Jetting....When is it needed???

2003 YZ450F

How do I know if I need to re-jet my thumper???

Is there any place you could recommend where I could learn about jetting and when it is neccessary and what the different options are etc....

What I am trying to say is....I know nothing about Jetting and I want to learn!!! :banana:

I just installed a Boyesen Quickshot and a Power Now, it came with a FMF pipe and silencer.... and I have never touched the jetting...How do I know if I need to and how would it help my performance??

Sorry for my ignorance and I feel like a goon for not knowing about this stuff but I really would like to learn!!!!!!!!!

Thanks :ride:

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