Can't compress front left spring enough in left front fork to screw cap down!

Before you remove the fork loosen the top triple clamp on the fork you want to remove. Now loosen the top cap of the fork. Loosen the bottom triple clamp and slide the fork out of the bike. Remove the top cap of the fork.There is spring pressure pushing against the cap, but if the fork is not being compressed it not difficult to take off or to put back on. When it is removed pour the oil in to a container and reinstall the cap. In stall the cap all the way but you don't have to tighten it.
Slide the dust cap up and off of the fork without scratching any of the chrome. Now remove the "C" clip or spring that was under the dust seal and place with the dust seal.Flip the fork upside down to access the allen head bolt in the bottom of the fork. Using an impact driver break this loose. Once loose remove the top cap and spring from inside. Now remove the the bottom bolt. Holding both tubes of the fork compress and snap apart quickly. This might take a few times but the should come apart rather easily.

To replace the front fork oil first support the motorcycle so the front end is off the floor and the forks are fully extended. Remember that the FLSTC and FLSTF models have a preloaded fork spring and that the fork tube plug is under spring pressure.Then you remove the fork tube caps. And then you drain the fork oil. ON FXSTD models, your remove the drain screws and washers from each fork and drain the fork oil this way. ON ALL MODELS EXCEPT the FXSTD, remove and discard the drain screws and washers from each fork and drain the fork oil and then you install new drain screws and washers. ON FXSTD models, apply LOCTITE THREADLOCKER 243 (blue) to the drain screws and tighten them to 12-18 inlbs (1.4-2.0 Nm). ON ALL MODELS EXCEPT FXSTD, tighten the drain screws to 52-78 in-lbs (5.9-8.9 Nm).THEN fill the fork with Harley-Davidson TYPE E FORK OIL (Part No. HD-99884-80).Either by installing oz or cc's of fluid if the forks were left in the frame or by measuring the amount of oil in the tubes in inches or mm if the forks were removed from the frame and disassembled. In the latter case the oil level is measured from the top of the fork tube with the spring removed and the fork fully compressed.

MODELs FLSTC, FLSTN use 13.4 OZ 395 cc4.41 inches 112.0 mm
MODEL FLSTF uses 13.4 OZ 397 cc5.04 inches128.0 mm
MODELs FXST, FXSTB, FXSTC use 12.5 OZ370 cc 6.69 inches170.0 mm
MODEL FXSTD uses 11.6 OZ343 cc 7.48 inches190.0 mm

FINALLY tighten the fork tube caps to 40-60 ft-lbs (54.2-81.3 Nm).

To change the oil or to rebuild a 2007 DYNA front fork FIRST raise and support the motorcycle so that the front end is off the floor and the forks are fully extended, remove the brake caliper and the front wheel, remove the front fender, loosen the pinch bolt screws, do not remove the tube caps, slide the fork sides downward clear of the fork brackets, repeat the procedure for the opposite fork tube and slider assembly.

To disassemble a 2007 DYNA front fork clamp the fork tube and slider assembly in a fork tube holder tool mounted horizontally in a vise, use a 12mm Allen wrench is needed to loosen but do not remove the seat pipe screw, while the internal components are still under tension and less prone to rotate, on the right fork tube and slider assembly, remove the axle holder to access the seat pipe screw, remove the fork tube cap and its o-ring, remove the long spring collar, remove the fork assembly from the fork tube holder tool and invert it over a suitable container to catch the fork oil and allowing thefork to drain, extend and retract the slider several times to push oil out of the internal fork components, the washer, and the spring will fall out of fork tube. THEN clamp the fork tube in the fork tube holder tool, remove the slider cover from the slider by inserting a brass drift into the notch in the slider and lightly tapping the cover loose, compress the stopper ring and remove the stopper ring from the groove in the top of the slider bore, Do not remove slider tube caps without relieving the spring preload or the caps and springs may fly out. THEN remove the seat pipe screw and its washer from the bottom of the slider and retain them for reuse, withdraw the slider from the fork tube until the bushing guide contacts the bushing on the fork tube (the bushing guide is a slight interference fit in the slider), then using the slider as a slide hammer, hit the bushing with the bushing guide with a quick continuous stroke until the slider is pulled free from the fork tube, drain the slider and allow the stop oil lock piece to fall free. (If you are only changing the oil or replacing the slider the remaining parts can be left assembled and the fork re-assembled) If it is still attached to the seat pipe remove the stop oil lock piece from the lower end of the seat pipe, remove the seat pipe piston and the ring assembly, remove the rebound spring, remove the oil seal, remove the seal spacer, and remove the bushing guide. Repeat the foregoing procedure for the opposite fork tube and slider assembly.

Thoroughly clean and inspect each part and if and as necessary replace any corroded, worn, bent, broken or otherwise damaged parts, inspect the fork tube bushing and the slider guide bushing and replace if and as required, always replace all oil seals and all o-rings, check the dust cover where it rubs on the fork tube (it should have a good and continuous seal and not show excessive wear, check the fork tube where it rubs on dust the cover and the tube should show a bright, shiny surface, free of scoring or abrasions, if any spring(s) is/are broken they must be replaced, if a fork tube or slider is bent or damaged it must also be replaced now, replace all other worn or damaged components if and as necessary.

To assemble a 2007 DYNA fork FIRST insert the seat pipe assembly with the spring into the slider tube, slide the bushing guide down to the bushing on the fork tube, follow it with the spacer, the oil seal, the stopper ring, the dust shield and the slider cover, install the fork tube into the fork tube holder tool, fit the lower stop onto the seat pipe, slide the seat pipe back into the fork tube until the seat pipe is centered in the tube, gently install the slider assembly onto the slider tube and the bushing, thread the seat pipe screw and washer into the seat pipe through the bottom of the slider assembly, draw the fastener into the seat pipe but do not tighten it at this time, verify the proper action of the fork by moving the slider up and down the fork tube, locate the appropriate fork seal driver over the fork tube in front of the oil seal with the fork seal chamfered lips facing the oil in the fork, in the following order assemble thetop oil seal, the spacer and the bushing guide into the slider bore, install the stopper ring into its groove above the oil seal, push the dust seal against the oil seal and stopper ring, rotate the slider cover to match any removal burrs to the notch in the slider and snap the slider cover into place. THEN operate the slider through its full range of travel several times to verify alignment and proper smooth operation, then pulling down on the slide to apply downward force on the rebound spring, tighten the seat pipe screw to 106-159 in-lbs (12-18 Nm), vertically re-position the fork tube into the fork tube holder tool and with the slider tube compressed, fill the fork with Harley-Davidson TYPE E FORK OIL until it is approximately the amount specified below for the type or motorcycle and fork that it is.

a. FXDWG- approximately 29.6 oz (875 cc) and distance from the top of the fork tube = 4.4 in (112 mm); and
b. All other Dyna models- approximately 26.6 oz (787 cc) and distance from the top of the fork tube = 4.3 in (110 mm)
THEN slowly pump the slider 8 to 10 times to remove air from the fork assembly and fully compress the slider to properly measure the oil level which is measured from the top of the fork tube, with the spacer and the spring removed and the fork fully compressed, then using an appropriate oil level gauge tool adjust the oil level to appropriate level for the fork type and model, pull out the slider and install the spring in the fork tube with the tightly wound end at the bottom, install the washer and the spring collar, carefully to avoid cross threading, install the fork tube cap with a new o-ring and tighten it to 16-43 ft-lbs (22-58 Nm). Repeat the process for the other fork tube and slider assembly.

To install the fork in a 2007 DYNA FIRST insert the fork tube and the slider assemblies up through the lower triple clamp and the upper triple clamp so that the fork tubes will protrude above the upper triple clamp 0.450-0.500 in. (11.4-12.7 mm) with the measurement taken at the midpoint of the fork tube between the top surface of the triple clamp and the top of the fork cap and when properly positioned tighten the pinch bolts to 30-35 ft-lbs (41- 48 Nm), install the front fender and bracket, install the front brake caliper(s), install the front wheel and align the wheel to the forks.

You may not have enough oil in the front forks or you may been a heavier viscosity of oil. I'm sorry but I don't have the oil capacity for your "Low Sportster". All I have is for "Hugger" models. They take 10.7oz. "wet" and 12.1 "dry". The difference between "wet" and "dry" is that if you simply drain and refill the front forks, it's call a "wet" oil change. If you disassemble and clean the forks of all oil inside, it's called a "dry" oil change. Contact the service department of your local shop and ask them how much oil goes in the front fork. To change the oil, there is usually a small screw in the trailing side of the lower fork slider down near the axle. Take these out and the oil will drain to a certain degree. Hold the brake while working the forks up and down with your weight to get all the oil that draining will get out of them. If you want all the oil out, you'll have to disassemble the fork tube. I would not do this if the seals are not leaking. Replace the screws in the sliders and then remove the top cap from one tube at the time and refill the tube with the specified amount of oil. Sometimes, the top caps can be difficult to get back in due to the pressure of the large spring in the front fork tubes. You may need a tool to compress the sping. I'm not sure on the "Low" model. I've always managed to the top caps back in without any special tool but I've never done a "Low" model bike. Harley uses what they call their "Type E" fork oil. I do not know what the viscosity of this oil is so I always use PJ-1 30 weight fork oil for most applications. Use only fork oil as any other oil may have a tendency to foam thereby negating any dampening action of the forks. If this doesn't solve your problem, you may want to check into changing the springs in the front forks. Progressive Suspension and others make kits for this.

Good Luck
Steve

I have no diagrams for you. MAke your own as you take it apart etc and take lots of cell phone pictures if you need help remembering how to put things back together.

Table 1-6. Type E Fork Oil Amounts

MODEL OZ CC IN. MM

FXDXT 11.5 341 6.10 154.9

FXDWG 12.0 356 7.28 184.9

FXDL 10.7 316 7.20 182.9

FXD 10.6 314 6.69 169.9

Changing fork oil is a simple mater for some models and requires fork disassembly for others. Here is the procedure for all 2001 DYNA models:

2001 DYNA FRONT FORK OIL 1.18

REPLACING FORK OIL Replace front fork oil at every 20,000 mile (32,000 km) service interval and/or prior to storage.

ALL BUT FXDX & FXDXT models

Raise and support the motorcycle so the front end is off the floor and the forks are fully extended, on FXDL models, remove the center plug from each fork cap, on all other models, remove the fork tube caps, remove the drain screws from the bottom of each fork and drain the fork oil, replace the drain screws and washers and tighten the screws

to 13-17 in-lbs (1.5-2.0 Nm) THEN see Table 1-6. and fill the fork with Harley-Davidson TYPE E FORK OIL (Part No. HD-99884-80) as set out in the Table. THEN if apart assemble the forks as follows:

a. FXD, FXDXT, FXDWG models: install both fork tube caps and tighten them to 11-22 ft-lbs (14.9-29.8 Nm).

b. FXDL models: install center plugs and tighten until secure.

Fork oil amounts can be measured two ways: use the oz./cc measurement if fork is left in frame; use the in./mm measurement if the fork is disassembled in which case the oil level is measured from the top of the fork tube with the spring removed and the fork fully compressed.

Table 1-6. Type E Fork Oil Amounts for 2001 DYNA

MODEL OZ CC IN. MM

FXDXT 11.5 341 6.10 154.9

FXDWG 12.0 356 7.28 182.9

FXD 10.6 314 6.69 169.9

PART NO. SPECIALTY TOOL

HD-41177 Fork tube holder

HD-41549A Fork spring compression tool

HD-41551 Spring plate tool

HD-36583 Fork seal installer

HD-59000A Pro-level oil gauge

FRONT FORKS: FXDX & FXDXT 2.20

REMOVAL

Raise and support the motorcycle so the front end is off the floor and the forks are fully extended, remove both front brake calipers and the front wheel, remove the front fender, remove the front fairing, remove the headlamp bracket and attach the headlamp to the frame using a rubber bungee strap, loosen the upper and lower triple clamp pinch bolts and pull the fork sides from the brackets.

DISASSEMBLY

Remove the stopper ring, remove the spring preload adjuster but DO NOT unthread the rebound adjuster from the damper rod because incorrect assembly could result in reduced adjustment range. THEN unthread the fork cap from the fork tube and allow the fork leg to drop, exposing the spring, THEN get a FORK SPRING COMPRESSION TOOL (Part No. HD-41549A) on the spring collar, turn the screws in to engage the holes in collar, compress the spring until the SPRING PLATE TOOL (Part No. HD-

41551) can be positioned between the spacer and the spring collar, THEN hold the fork bolt and compression adjuster, remove the fork bolt from the compression adjuster, remove the spring adjuster plate from the fork bolt, remove spacer, spring collar and spring, pour out the fork oil by pumping the fork leg and rod 8-10 times or until rod the moves freely. THEN position fork slider in vise using a FORK TUBE HOLDER such as (Part No. HD-41177) to avoid damage. THEN remove the socket head bolt, remove the damper from the fork tube, remove the cover from the slider, remove seal and stopper ring, pull the fork tube out of the slider, remove the oil seal, spacer and guide bushing from the fork tube.

CLEANING AND INSPECTION

Measure the fork spring free length and replace the spring if it is shorter than 17.00 in. (431.8 mm), check the fork tube and the slider for score marks, scratches or abnormal wear, check the slide and guide bushings for excessive wear or scratches, set the fork tube on V-blocks and measure runout which should not exceed 0.008 in. (0.2 mm).

ASSEMBLY

Coat the oil seal with TYPE E FORK OIL, before installing the slide bushing and guide bushing, lubricate them with fork oil, THEN install the guide bushing and the spacer seal noting that the guide bushing opening must be oriented to the side and NOT to the front or rear, THEN slip the slider into the fork tube, place the slide bushing over the fork tube until it rests on the slider, drive the guide bushing with the spacer seal into the slider, lubricate a new oil seal with TYPE E FORK Oil, drive the oil seal into the slider using FORK SEAL INSTALLER (Part No. HD-36583). install the stopper ring and dust seal, (if the rebound adjuster was removed from the damper rod bottom the lock nut on the threaded portion of damper rod, holding a thumb on the detent spring and ball, back out (turn counterclockwise) the rebound adjuster to the last "click." and then turn down (clockwise) 17 "clicks", thread the rebound adjuster onto the damper rod until the adjuster stops at maximum thread engagement (but do not force it), thread the locknut onto the damper rod up until it contacts the base of the rebound adjuster and tighten it in place), THEN holding the slider in a vise while being careful not to damage it. install the damper tube into the fork tube and tighten the socket screw and washer to 22-29 ft-lbs (29.8-39.3 Nm). THEN pour half the TYPE E FORK OIL into the fork tube, slowly pump the damper rod 10 or more times, position the damper rod in the fully bottomed position and pour the remaining amount of TYPE E FORK OIL into the fork tube. THEN using a PRO-LEVEL OIL GAUGE (Part No. HD-59000A) or similar adjust the oil level to 5.04 in. (128 mm). THEN carefully clean and install the spring, the spring collar, and the spacers with the sharp edge created when they were stamped out when manufactured, facing the collar. THEN using a FORK SPRING COMPRESSION TOOL such as (Part No. HD-41549A) push spring collar down and place a SPRING PLATE such as (Part No. HD-41551) between the spacer and the spring collar, install the fork cap and tighten it against the rebound adjuster to 22-29 ft-lbs (29.8-39.3 Nm). THEN tighten the fork cap onto the fork tube to 11-22 ft-lbs (14.9-29.8 Nm), install the spring adjuster plate, replace the O-rings on the spring preload adjuster and lubricate them with fork oil. THEN install the spring preload adjuster and the stopper ring and carefully drive the slider cover into the slider.

INSTALLATION

Insert both fork side assemblies up through the fork stem and bracket and upper bracket and tighten the fork stem bracket pinch bolt(s) to 30-35 ft-lbs (40.7-47.5 Nm). Then re-install the headlamp bracket, install the front fender, install the front wheel and the brake caliper When the motorcycle is again ready for the road adjust the headlamp and road test the motorcycle.

Hopefully you will glean all you need to know from this but if you want or need more information or more FXD specific information PLEASE H

Hopefully the information below will be okay BUT if you need any more or any more specific information please post a comment and describe what you want/need.

REPLACING FORK OIL Replace front fork oil at every 20,000 mile (32,000 km) service interval and/or prior to storage.

ALL BUT FXDX & FXDXT models

Raise and support the motorcycle so the front end is off the floor and the forks are fully extended, on FXDL models, remove the center plug from each fork cap, on all other models, remove the fork tube caps, remove the drain screws from the bottom of each fork and drain the fork oil, replace the drain screws and washers and tighten the screws

to 13-17 in-lbs (1.5-2.0 Nm) THEN see Table 1-6. and fill the fork with Harley-Davidson TYPE E FORK OIL (Part No. HD-99884-80) as set out in the Table. THEN if apart assemble the forks as follows:

a. FXD, FXDXT, FXDWG models: install both fork tube caps and tighten them to 11-22 ft-lbs (14.9-29.8 Nm).

b. FXDL models: install center plugs and tighten until secure.

Fork oil amounts can be measured two ways: use the oz./cc measurement if fork is left in frame; use the in./mm measurement if the fork is disassembled in which case the oil level is measured from the top of the fork tube with the spring removed and the fork fully compressed.

Table 1-6. Type E Fork Oil Amounts for 2001 DYNA

MODEL OZ CC IN. MM

FXDXT 11.5 341 6.10 154.9

FXDWG 12.0 356 7.28 182.9

FXD 10.6 314 6.69 169.9

PART NO. SPECIALTY TOOL

HD-41177 Fork tube holder

HD-41549A Fork spring compression tool

HD-41551 Spring plate tool

HD-36583 Fork seal installer

HD-59000A Pro-level oil gauge

FRONT FORKS: FXDX & FXDXT 2.20

REMOVAL

Raise and support the motorcycle so the front end is off the floor and the forks are fully extended, remove both front brake calipers and the front wheel, remove the front fender, remove the front fairing, remove the headlamp bracket and attach the headlamp to the frame using a rubber bungee strap, loosen the upper and lower triple clamp pinch bolts and pull the fork sides from the brackets.

DISASSEMBLY

Remove the stopper ring, remove the spring preload adjuster but DO NOT unthread the rebound adjuster from the damper rod because incorrect assembly could result in reduced adjustment range. THEN unthread the fork cap from the fork tube and allow the fork leg to drop, exposing the spring, THEN get a FORK SPRING COMPRESSION TOOL (Part No. HD-41549A) on the spring collar, turn the screws in to engage the holes in collar, compress the spring until the SPRING PLATE TOOL (Part No. HD-

41551) can be positioned between the spacer and the spring collar, THEN hold the fork bolt and compression adjuster, remove the fork bolt from the compression adjuster, remove the spring adjuster plate from the fork bolt, remove spacer, spring collar and spring, pour out the fork oil by pumping the fork leg and rod 8-10 times or until rod the moves freely. THEN position fork slider in vise using a FORK TUBE HOLDER such as (Part No. HD-41177) to avoid damage. THEN remove the socket head bolt, remove the damper from the fork tube, remove the cover from the slider, remove seal and stopper ring, pull the fork tube out of the slider, remove the oil seal, spacer and guide bushing from the fork tube.

CLEANING AND INSPECTION

Measure the fork spring free length and replace the spring if it is shorter than 17.00 in. (431.8 mm), check the fork tube and the slider for score marks, scratches or abnormal wear, check the slide and guide bushings for excessive wear or scratches, set the fork tube on V-blocks and measure runout which should not exceed 0.008 in. (0.2 mm).

ASSEMBLY

Coat the oil seal with TYPE E FORK OIL, before installing the slide bushing and guide bushing, lubricate them with fork oil, THEN install the guide bushing and the spacer seal noting that the guide bushing opening must be oriented to the side and NOT to the front or rear, THEN slip the slider into the fork tube, place the slide bushing over the fork tube until it rests on the slider, drive the guide bushing with the spacer seal into the slider, lubricate a new oil seal with TYPE E FORK Oil, drive the oil seal into the slider using FORK SEAL INSTALLER (Part No. HD-36583). install the stopper ring and dust seal, (if the rebound adjuster was removed from the damper rod bottom the lock nut on the threaded portion of damper rod, holding a thumb on the detent spring and ball, back out (turn counterclockwise) the rebound adjuster to the last "click." and then turn down (clockwise) 17 "clicks", thread the rebound adjuster onto the damper rod until the adjuster stops at maximum thread engagement (but do not force it), thread the locknut onto the damper rod up until it contacts the base of the rebound adjuster and tighten it in place), THEN holding the slider in a vise while being careful not to damage it. install the damper tube into the fork tube and tighten the socket screw and washer to 22-29 ft-lbs (29.8-39.3 Nm). THEN pour half the TYPE E FORK OIL into the fork tube, slowly pump the damper rod 10 or more times, position the damper rod in the fully bottomed position and pour the remaining amount of TYPE E FORK OIL into the fork tube. THEN using a PRO-LEVEL OIL GAUGE (Part No. HD-59000A) or similar adjust the oil level to 5.04 in. (128 mm). THEN carefully clean and install the spring, the spring collar, and the spacers with the sharp edge created when they were stamped out when manufactured, facing the collar. THEN using a FORK SPRING COMPRESSION TOOL such as (Part No. HD-41549A) push spring collar down and place a SPRING PLATE such as (Part No. HD-41551) between the spacer and the spring collar, install the fork cap and tighten it against the rebound adjuster to 22-29 ft-lbs (29.8-39.3 Nm). THEN tighten the fork cap onto the fork tube to 11-22 ft-lbs (14.9-29.8 Nm), install the spring adjuster plate, replace the O-rings on the spring preload adjuster and lubricate them with fork oil. THEN install the spring preload adjuster and the stopper ring and carefully drive the slider cover into the slider.

INSTALLATION

Insert both fork side assemblies up through the fork stem and bracket and upper bracket and tighten the fork stem bracket pinch bolt(s) to 30-35 ft-lbs (40.7-47.5 Nm). Then re-install the headlamp bracket, install the front fender, install the front wheel and the brake caliper When the motorcycle is again ready for the road adjust the headlamp and road test the motorcycle.

Spring preload FR
To increase the spring preload and
thereby harden the suspension, turn
the adjusting bolt on each fork leg in direction
a. To decrease the spring preload
and thereby soften the
suspension, turn the adjusting bolt on
each fork leg in direction b
NOTE: _
Align the appropriate groove on the adjusting
mechanism with the top of the
front fork cap bolt.
_
CI-10E
Rebound damping force
To increase the rebound damping
force and thereby harden the rebound
damping, turn the adjusting screw on
each fork leg in direction a. To decrease
the rebound damping force and
thereby soften the rebound damping,
turn the adjusting screw on each fork
leg in direction b.
CI-02E
Compression damping force
To increase the compression damping
force and thereby harden the compression
damping, turn the adjusting screw
on each fork leg in direction a. To decrease
the compression damping force
and thereby soften the compression
damping, turn the adjusting screw on
each fork leg in direction b.
CI-02E
1. Current setting
2. Front fork cap bolt
Setting
Minimum (soft) 8
Standard 6
Maximum (hard) 1
1. Rebound damping force adjusting screw
Minimum (soft) 26 clicks in direction b*
Standard 13 clicks in direction b*
Maximum (hard) 1 click in direction b*
* With the adjusting screw fully turned in direction a
1. Compression damping force adjusting screw
Minimum (soft) 20 clicks in direction b*
Standard 13 clicks in direction b*
Maximum (hard) 1 click in direction b*
* With the adjusting screw fully turned in direction a
_
Although the total number of clicks of a
damping force adjusting mechanism
may not exactly match the above specifications
due to small differences in
production, the actual number of clicks
always represents the entire adjusting
range. To obtain a precise adjustment,
it would be advisable to check the number
of clicks of each damping force adjusting
mechanism and to modify the
specifications as necessary
CI-10E
Rebound damping force RR
To increase the rebound damping
force and thereby harden the rebound
damping, turn the adjusting screw in direction
a. To decrease the rebound
damping force and thereby soften the
rebound damping, turn the adjusting
screw in direction b.
CI-14E
Compression damping force
To increase the compression damping
force and thereby harden the compression
damping, turn the adjusting screw
in direction a. To decrease the compression
damping force and thereby
soften the compression damping, turn
the adjusting screw in direction b.
CI-14E
Setting
Minimum (soft) 1
Standard 4
Maximum (hard) 9

Whole process where need to turn toward "a" means clockwise and "b" counterclockwise. From Yamaha service manual. Hope this is good enough info to help you out. Good?

Remove the spring caps but leave the springs in. Compress the front suspension fully. Find a rod or wood dowel that will slide easily down the middle of the spring. Mark it 6 - 7 inches from the end. Insert the rod/dowel to the mark. The bottom of the stick is the proper level of fluid, in most cases. Please buy a service manual!

With the springs out,compress the forks fully then fill them to 150mm (6in) from the top. Refit springs and caps and you are good to go

do not compress the fork springs you must take the pressure off the springs by jacking up front end of the bic this will take some of the pressure off but be careful when removing the fork bolts there will still be some spring pressure there. drain all oil out of the shocks then you have to find out the right amount of oil and grade you need for your specific bic. hope this helps