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View Full Version : jetting help


jkiserracing
07-06-2008, 06:52 PM
so I have a 450r with a stock header but Pro Circuit slip on and K&N filter. Its jetted properly for this set up. My question is Im about to replace the stock header with a FMF power bomb header. Will I need to re jet by replacing the stock header or should it work fine as is.
jkiserracing
07-09-2008, 09:40 PM
update: since no one replied maybe no one knew. I put on the new header with no rejetting needed......
turcol450
07-16-2008, 08:22 AM
yea jet it asap. the whole reason for the pipe is more power and if its not going to get the fuel to it then theres no more power breing made. atleast bump it up 1 size. you can probaly go with 2 though . on my yfz450 i jsut have out my baffle and i jetted it up 2 sizes and it made a big difference so bump it upp dude