Do you use the t mark or the f mark to set the timing on a 2002 Yamaha big bear. I read to forums one had to put it on the timing mark another put it on the firing mark

Question edited for clarity.
Question moved to model category.

It is a Speed Sensor issue.

https://www.google.com/search?q=yamaha+big+bear+flashing+red+brake+light+on+dashboard

..

If the CV Joints are new and correctly inserted, the most likely culprit for the noise would be the brakes. Remove the front wheels and turn the hub.

It could also be the front differential, or failed wheel bearings. Details in the link.

https://www.google.com/search?q=Yamaha+big+bear+350+4x4%2C+front+wheels+grinding+noise

..

go to an oem parts supplier (for example, cheapcycleparts.com) and look at their parts diagram.

The timing is not adjustable. I would start with a clean air filter, clean carb, good spark plug, check and make sure that your cam timing matches your flywheel.

Hi Ryan , the timing gear marks will possible not mark hundred percent when timing chain is worn much . the tensioner should be inside when you check the valve timing .

No matter which atv model you have - take a look and measure your inside diameter for your swing arm. Salvage motorcycle yards in your area would have one somewhere - but the cruisers are shaft drive, too. If you take a look at some of the swingarm assemblies online - it'd definitely work - and worst case? A little bit of alteration - and if you keep your eyes on the like the Yamaha street cruiser swingarms - just a small drive shaft there in between engine and final driven gear - easily modified at any shop that makes or alters driveshafts/welders. These pics are from a 2002 Yamaha 1100 and a 2002 Yamaha Big Bear 400. If you look for a rear assembly your year and manufacturer odds are some of the parts will even be the same.

This is from the 1100
This is from the Big Bear



Middle Drive Gear for the 1100:


Middle Drive Gear for the Big Bear:



And here's what the swingarm and wheel assembly look like for the 1100:





It's doable. My dad took a 69 or 70 Volkswagen Beetle, cut it up, took the front half of the front fender and the back half of each back fender, combined them and on each side was a long fender with a headlight. He didn't want it to be a beetle so he called it the widow and painted the red hourglass on the back. The front end? That's the front bottom of a hull from an old jet ski. Foot clutch, shifter in the middle, electric mirrors, stereo, new pipes, Two seater and a paint job later -



Won best homemade or trike, etc. everywhere he went. Had no choice but to put the wheelie bar on it'd come up 18 inches if you popped the clutch. Sold it for just under $10k to a guy from Indiana who was down here for the Turkey Rod Run Antique Car Show in Daytona at the speedway they do every year. Saw it. Went home. Called my dad a few days later. Week's time he was loading it onto a trailer and hauling it back. I'd really appreciate seeing a picture if you get yours together. All The Best, Justin Lee, 17 South Industries, LLC

Removing The Rear Brake Drum & Shoes on Grizzly 600 ...

? 5:04
www.youtube.com/watch?v=n5oO7v3nT6s
Mar 11, 2012 - Uploaded by myquadrepair
Removing the rear brake drum & shoes on Yamaha grizzly 600. ... Yamaha Big Bear Oil Change and More! - Duration: 10:43. by jfrost77hd ...

HONDA FOREMAN REAR BRAKE CHANGE PART 1 ...

? 11:49
https://www.youtube.com/watch?v=xQanZdlDCI0
Jul 17, 2012 - Uploaded by 400EX99N
HOW TO CHANGE REAR BRAKES ON A HONDA ATV. ... is this about the same for a 2004 yamaha big bear 400? Read more Show less.

You will need to find the timing marks and have the firing specifications to line it up. Most timing marks have the Top Dead Center position marked with a large raised triangle mark. Take out the spark plugs and use a pencil with an eraser to determine (by feel) when the piston raises all the way up the cylinder... this is the TDC position. Line up the chain so that the TDC triangle corresponds to the actual piston travel inside the cylinder. Once you have them aligned, dial back the timing the few degrees specified in the manual. Put the plugs back in and fire it up. It it sounds "off" then repeat the process, something wasn't aligned correctly.

Got a 2001 400 big bear has good spark but won't fire off. I was told by a friend that it might have jumped time how would I go about timing this model