2002 wolvy 350 probs

[cherokee1993]

Hi new to the forum but not the sport. i just picked up my first 4x4 which i love so far but got some minor or hopefully minor problems. well to start off it will start right up and idle with full choke on but pops and backfires through the carb and as soon as you touch the throttle it will bog and die. as soon as you can get it to go up past idle the machine runs great. it is all stock but came from alaska. pulled the carb apart and cleaned it good. drained gas out of tank and put fresh high grade fuel in. what would be causing the issues with the throttle acting like it does. i did the same that i did to my yfz and disonnected the parking brake sensor thinking that was it but still doing it. o yeah jetting sizes on it are main 141.3 (idk its wht is stamped on the jet. and pilot was 42.5. any help would be greatly appreciated.

 

[b_700x]

Welcome to the forum!

So it only idles with the choke on? Sounds like it could be a jetting issue. What elevation are you at, and what was the elevation where it came from?

 

[cherokee1993]

not to sure on the elevation it came from but im around 300 average elevation. i looked at the main again and its 140 which is stock jets for this quad as far as i can find

 

[b_700x]

Well if it runs fine on choke, I'd say it's a pilot jet or needle issue.

 

[cherokee1993]

the needle is on the third clip. any recomendations on pilot size or needle clip pos. where wolud i be able to order a jet from. our local stealership sucks.

 

[b_700x]

I would go up to a 45 pilot jet to start, see what that does.

Should be able to get jets at any Yamaha parts dealership, like Mr Cycles, Riva Yamaha, CheapCycleParts.com, etc.

 

[cherokee1993]

cleaned the carb again. pushed a small small wire through the pilot jet and put it together again now she runs great. thanks for all the help

 

[b_700x]

Awesome, glad ya got it all worked out!