What size main jet should I run in my 2008 trx450er that has full exaust, intake, camshaft, port and polish?

Question

What size main jet should I run in my 2008 trx450er that has full exaust, intake, camshaft, port and polish?

Answer 1

Depending on what exhaust it is, most on the manufacturers have jetting specs that they would be more than happy to tell you. Id try to get ahold of the company and see where that gets you.

Answer 2

Jetting is a tough one...All you can do is go up one jet at a time and try it...Once you start adding aftermarket parts..there is no magic jet number to just tell you to put in..

Best thing to do is to warm the motor..do a run down the road...on the way back chop the plug...say 3rd gear half throttle hit the kill switch.until stopped....Pull the plug and see if it is tan to dark tan (good)...If it is whiteish...to lean (Bad)...If it is black and oil-eee to rich.(bad)....smaller jet for leaner....bigger jet for richer.....

Hope this helps.....Good luck.

Answer 3

Contact me for a carb trouble shooting guide.

It will give you tests to make while riding and tell you what to change/adjust for optimum running performance.