yamatyb9
New member
I have 2-'02 yamaha vipers, one runs like a top and the other just doesnt seem the same. As far as i know they're all stock, the one just doesnt seem to idle as high or have as much power when throttled. Just wondering if i'm overlooking something or whats the problem?? any help appreciated, Thanks!
gil7247
VIP Member
I would start by assessing both sleds condition, compression checks, clean carbs condition of plugs etc. then post your findings and their are lots of guys on here who'll help you out.
yamatyb9
New member
both sleds just had a once over (carbs and clutch cleaned, new pugs, etc etc etc) everything was fine.. Never rode the one sled before though as i just purchased it this year recently. Thought the mechanic would have caught it, but maybe not? Maybe just a fluke and bad gas coming through or something? seemed to have a little extra smoke in the exhaust as well.
super1c
Super Moderator
Like gil said a compression check is in order. That will at least give us an idea if the engine is healthy. I have 3 vipers and they are all a touch different.
Devilin AblueDress!
New member
I would say the 2 things that have the biggest impact towards what your talking about are the carbs and power valves. You say you just bought the one, any ideas what previous owner may have done with it? Clip position/jetting wise? I would tear into carbs and see what they are set up for and check them power valves.
yamatyb9
New member
ok, thanks for the responses!