big bore question

[jcs327]

I am thinking of going to an athena 470. everything else is stock except for fmf t4 slip on and k&N with no lid. has anyone installed this kit and had to make any major jetting changes? thanks.

[Trx4Life]

I herd they were asome, dont know about jetting though. I put one on and snaped the rod before it was warmed up the first time. I would now advise installing an aftermarket rod with this kit.

Hey does any one know where I can find one for an 06 - 07 yfz?

[dr.dyfz]

i just got that kit and i am installing it and a hot rods crank and rebuilding my motor but i talked to some guys that have it and they say it is bad ***** and so much fun. cant wait to ride it:D :D :D
Trx4Life go through www.motosports.com they got it for 04-06 so it should fit thats what i got 4 mine