20 Most Recent 1991 Honda ST 1100 Pan European Questions & Answers

Hi, Johnshore74 and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
13. Faulty auto choke or wiring connection.
For more information about your issue and valuable "Free" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Won run without the choke on
Thread 95 St1100 Runs on choke only and stumles from idle to mid range
HONDA ST1100 ABS BIKE 1990 2002 WORKSHOP SERVICE MANUAL Download Manuals... $17
Honda pan european ST1100 Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1991 Honda ST... | Answered on Feb 18, 2018

Hi, Terry and the usual suspects are:
1. Severely discharged or a damaged battery must have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
2. Faulty alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Faulty main circuit breaker or ignition switch, check for loose connections and continuity.
5. Faulty system and or ignition relay, check for continuity.
6. Faulty ignition coil, ignition/electronic module.
7. Faulty CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Faulty neutral, side stand or clutch lever safety switch.
10. Fuel tank empty
11. Fuel tank contaminated with ethanol sludge.
12. Water or dirt in the fuel system, or clogged filter.
13. Restricted, blocked or kinked fuel line.
14. Faulty fuel pump.
15. Faulty pressure regulator.
16. Faulty or clogged fuel injectors.
17. Lean angle switch is faulty or needs adjustment.
For more information about your issue and valuable "FREE" downloads that you need please click on the blue links below. Good luck and have a wonderful day.
Honda ST1100 Pan European cutting out
Honda 2003 ST1300 Service Manual
Honda ST1100 Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

1991 Honda ST... | Answered on Jun 12, 2017

what exactly does "the battery checks out good" mean? What is the voltage reading that you are getting? If anything lower than 12.7 V then that battery is shot or on its way out.

The solenoid not clicking could mean 1 of 2 things.
1. Not enough juice going to it to activate it.
2. The solenoid itself is bad.

If you short out the solenoid by touching both terminals with a screw driver, does the starter start then?

1991 Honda ST... | Answered on Apr 19, 2017

Cylinder head bolt - 42ft-lb or 57Nm ( use engine oil on the thread surface)
Cylinder had cover bolt - 9ft-lb or 12 Nm

1991 Honda ST... | Answered on Oct 25, 2013

you will find that its a faulty actuator common fault.somtimes its the front somtimes it the rear they are costly buy a manual on disc from ebay and go though the checks.

1991 Honda ST... | Answered on Jun 15, 2011

The CDI controls the firing order of the coils independantly of each other, if you are getting backfiring then that means that there is enough fuel getting to the combustion chamber, it's just not igniting when it should, which can be caused by faulty spark plugs (you've replaced) faulty coils (you've replaced) the only things left are the CDI and the ignition pulse generator, either of these could be faulty but the CDI is the most likely, unfortunately you can't really test it, the only thing you can do is to swap it with a known good one. Just a thought, check connectors for corrosion.

1991 Honda ST... | Answered on May 19, 2011

The general rule for oil sight glasses is check them with the bike on level ground and the bike held horizontally, NOT on the side stand or centre stand. It's a good idea to get a helper, especially for a heavy bike like a this one. If you can't see any oil, you don't have enough, add more until it reaches the top of the sight glass. Just make sure it's really empty. Sometimes the glass get's an oil stain over time and it can be hard to tell when it's full of clean oil. If you really aren't sure, get someone to lift the bike off the sidestand while you are watching it and you will definitely see the oil level rise up and go over the top if it's actually over full rather than not full enough.

1991 Honda ST... | Answered on Feb 22, 2011

Do you have it on a trickle charger? Maybe low battery voltage.

1991 Honda ST... | Answered on Aug 16, 2010

A small punch or chisel may get it to turn.
If not you may need to drill the head off with a 6mm drill, this should leave a little bit of thead that can be removed with vice grips after the ignition is off.

1991 Honda ST... | Answered on Jul 03, 2010

replace the caliper seals and clean up the pistons clean the grooves that the seals sit in then refit and bleed the system problem will be sorted

1991 Honda ST... | Answered on Oct 08, 2009

With difficulty
either take off the panel under the headlight & struggle
remove plastics (possibly including the screen as well!) until the rear of the headlight lens is accessible
Good luck
Ride Safe

1991 Honda ST... | Answered on Aug 03, 2009

I'll give you 100 bucks for it. Sounds like you need some TLC.

1991 Honda ST... | Answered on Jun 15, 2009

280mls its the same as cc,s

1991 Honda ST... | Answered on Jun 13, 2009

The bike gets 3.25 quarts of 10w40 motor oil. Use 20w 50 if in hot areas like Nevada / Texas etc.. Don't use any synthetic oils, oil marked "EC", or oil with "special" additives. Stick with the major brands; Pennzoil, Quaker State, Mobil or Shell. The drain plug is on the front edge of the bottom pan. Change the oil filter also. Put a film of oil on the rubber seal when installing.

Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx

A “very helpful” rating for this answer? Thanks!

1991 Honda ST... | Answered on Jun 13, 2009

The only way to raise the seat is to have the seat re-upholstered and have the upholstery shop add some very solid additional padding.

1991 Honda ST... | Answered on Jun 08, 2009

the floats are sticking. use good fresh gas with a bottle of carb cleaner should do the trick.

1991 Honda ST... | Answered on Mar 20, 2009

Hi and welcome to FixYa,

Initially, pls check the airbox, air cleaner and how the assembly is fitted. Backfire on deceleration indicates lean mixture (too much air, too little fuel). A flatspot could be anything, let's try the air cleaner/box first and proceed from there. Might get lucky to solve both problems with 1 solution.

A favor, I would rather that you please do not rate this solution (yet) not unless it solves the problem. Due to my current rank and rating, even a Helpful would be detrimental to my standing.

Good luck and Thank you for using FixYa. Happy Holidays.

1991 Honda ST... | Answered on Jan 20, 2009

1) Firstly, try using DUCK OIL. Heat it up and then pour it down the spark plug holes. Leave it a week and then gently try and induce the engine to turn over.

2) This is the hardcore option. Apply a blowtorch or gastorch to the barrel itself and see if the heat frees it up.

1991 Honda ST... | Answered on Dec 13, 2008

Use Marvel Mystery Oil, it will loosen the rust that you may have incurred while the bike was sitting. Just one word of caution, if the mystery oil does get the pistons free I doubt seriously that you will have any significant ring seal left. You may be better off removing the heads to see if there is serious damage. You can easily bend a rod if you are not careful and it's not worth destroying the engine because of the rust issue.
What most likely has happened is your cylinders suffered from condensation which will promote the rust. The pistons will not rust, (they are aluminum), but the rings and the cylinder walls will. You may need to simply remove the pistons and run a quick hone through the cylinders, put new rings in and be good to go.
By no means should you attempt to push start it or anything remotely close. You can take a wrench and try turning the motor over by wrenching on the end of the crankshaft where the electrical stator is. A small amount of rust will stop the starter motor from turning the motor over.
Let the Marvel Mystery Oil soak over night before trying anything like turning the motor over. You may be very surprised and lucky if it works.
Best of luck to you.

1991 Honda ST... | Answered on Dec 10, 2008

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