[mcoleman5]

I am removing the air filter box on my rapter 660. I want to know how many sizes up do I need to jet it?

 

[Flynbyu]

Need more info.

Location (for elevation), and your modifications.

~Brian

 

[mcoleman5]

I am located in Columbus, Georgia. I have a slip on exhaust, K&N filter and my Quad runs perfect. I do not know the size of the jets that are in right now because I bought the quad with these mods. But my question is how many jet sizes up do I need to go when I remove the airbox?

 

[raptor_rider]

I ended up going from a 140/145 to a 170/175 still was not right with mukuni jets ?
Only after putting the k & N on...
Would not rev past 3/4 throttle, made a huge difference to my bike...
I had to end up buying a dynojet kit to get mine right.... took weeks of troubleshooting...