Anyone know the stock main jet size for a wolverine? Also I installed a torque stuffer and the machine keeps backfireing... I'm trying to find out what the deal is with this thing....I have a 145 main jet in it, the needle is in stock position and when i test the plug its black with a faint white ring around it......Am i running lean? could this be causing the backfire issue? What should i do?

 

ok ,am i out of luck in this yamaha forum??????

 

Yes white does mean you are running lean. I am not to sure on the torque stuffer because I don't run one.

Start here and it should tell you what your stock jet is.

OEM Parts Details

 

Thank you jcsact , i allready have main jet 2 sizes larger than stock 145 as compared to 140.....should i try raising the clip on the needle a few notch's??? Will this richen it?

 

To be quite honest I don't know that much about carbs, but I do believe if you raise the needle it will let more fuel in and that is what you want. I think? [img]i/expressions/face-icon-small-smile.gif[/img] Sorry I could be of more help. Are you running stock exhaust?

 

if it's backfiring at 1/4-1/2 throttle, then yes, move the clip down to richen it. It it's backfiring right 0-1/4 throttle, you need a richer pilot, if it's backfiring at full throttle, you need a bigger main.

 

ok i went to adjust the needle and found a hole in the diaphram. This might be my whole problem right here.im going to try to repair it with some fishing wader repair glue........what do you think? If it works.....im trading her in for a Suzuki Vinson....nothin but problems with this junker. -------------> MAD <---------------

 

Zig,
I am sorry to hear that. What are all the problems you have had with her?

 

well my problem has always been tuning in the carb.....I had also put bearclaws (front 25x8; back 25x10) on douglas 190's on it and it seems a bit top heavy (tipsy) on off camber trails. I also think yamaha is way behind in the times with this machine.... You would think that they would have at least made it a 500 motor and the ability to switch from 2 to 4 wheel drive by now. All time 4 wheel drive on this machine is old......You realy dont need it when your cruising down a logging road to the next trail head...