tuning carb

[MRcandyshorts]

i have a 35mm keihin pwk car on my 2001 blaster. it came with a dynoport exhaust system. its been running terrible in the high end when i hit 4th-6th gear. so im assuming its the clip on the needle or i need to jet it. any suggestions on which groove to put the clip on? and how do i take apart to get to that clip? also i have no idea what the model the exhaust is. i cant find it online using the model number

 

[scotj77]

It's running terrible how? detonation or bogging? if you are running at wide open throttle it probably isn't your needle

 

[MRcandyshorts]

once i hit 4th gear and up i lose all my power and it just sounds like its studdering. and i also have hard time climbing hill in trails and pits. even small inclines it bogs down more then most other wheelers.