jetting on raptor 350

[yamaha350rider]

i just installed a hmf slip on pipe is there a chance of me blowin up my engine if i dont adjust the jetting?

 

[dswwarrior350]

After a while yes... jetting will increase power and safegaurd your motor so do it.

 

[palerider]

If all you did so far was put on the pipe just take the 30 minutes to pull off the gas tank get to the top of the carb and drop the needle clip to the bottom position. There are 3 clip positions on the stock needle on the 350, stock it is in the middle. This is what HMF calls for on their jetting specs for the 350 with only a pipe.