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View File 2023 Yamaha RMAX4 Wolverine 1000 service manual
Factory service manual
2023 Yamaha RMAX4 Wolverine service manual
Submitter flyinbrian365 Submitted 06/08/2026 Category Yamaha UTV  

View File 2021-22 Yamaha RMAX4 1000 Wolverine service manual
Factory service manual
2021-22 Yamaha RMAX4 1000 Wolverine service manual
Submitter flyinbrian365 Submitted 06/08/2026 Category Yamaha UTV  

Setting the timing on a 2005 Yamaha 250 Bruin

Hi everybody!  Just wanted to introduce myself coming from NBTX.  Got some used Honda TRX250's this year and have been hooked on more fixing them up than actual riding right now.  Probably could use some help from the folks here on getting 2 of them in proper running order, but I'm sure I'll have to post that elsewhere!
But anyways, glad to be here and looking forward to chopping it up with y'all!

I got asked to work on a pair of Yamaha 350's.  One has grizzly stickers, one has bruin stickers.  Both are 2wd, straight rear axle.  Not sure what year.  I'd guess '04-'08.
Both have a no start condition.  Both have been sitting 2+ years.  One came with box of parts the owners 15 year old kid removed to try and get it running.
Started working on one last night.  Pulled the rack, front plastic, fuel tank, recoil starter, carburetor.  
Removed petcock from tank, cleaned screens, made sure if flows air, reinstalled.
Drained fuel tank, put in fresh fuel, swirled it around, letting is soak and will drain and check it later.
Cleaned up the motor a bit since its covered in mud.  Checked the valves.  The intake had less zero, actually, probably less than zero clearance.  The valve seems like it was hanging open just a touch even at TDC.
The exhaust had maybe .004 clearance.  I assume that went to zero once running.  
Adjust intake to .008.  Adjusted exhaust to .018
Scrubbed the carb in a sink with a toothbrush, dawn, and water.  It looked like a mudball.
After that, sprayed it down with carb clean and took it to the bench.  A/F screw was 1.75 turns out.  I'm thinking this is a factory setting.  It seems like this machine was never touched by a mechanic.  All the jets actually seemed clear.  The bowl had minimal residue in it.
That about as far as I made it for the night.  Going to get a fresh plug, clean the air filter, add some fresh gas, and see if it will run.  If so, I'll probably clean up the oil cooler before putting it back together.  Maybe change the engine oil  and rear diff fluid too.