YFZ450R FMF 4.1 with Mega Bomb header

[Black 93 Fox]

Well I decided to go different on the exhaust with my R. Haven't seen anyone yet run the FMF 4.1 with the mega bomb header. I got everything in today put it on fits pretty good only issue the header bend is pretty close to the lower rad hose. Hopeing to get it dyno tuned this week see what the gain is since the last tune with the factory exhaust.

[Koopa]

Nice! Keep us informed!

[Scooter86]

I have been running a mega bomb on my YFZ ('05, not an R.) I melted a bit of radiator hose the first ride with it. Had to use some zip ties as a field expedient stop gap. I've also melted the plastic logo on my Fox boots. Otherwise it does perform well.

[Black 93 Fox]

I guess I just wanna be super carefull. I'm gonna try to find some high temp foil tape or something. I'll post a pic to show how close it is to the rad hose.

[bigned1904]

where about r u from?

[Black 93 Fox]

Vancouver, WA I normally ride at Sand Lake, OR or Winchester Bay, OR.

[YFZ660R]

that's really gonna open her up.. the yfz comes quite restricted in stock form. enjoy your new ponies!

[bigned1904]

nice dunes up there forsure. now u just need to get some real paddles lol

[Black 93 Fox]

Alright guys results are in ended up with 49 HP and 35 TQ. The graphs he gave me are not that good of quailty he gave me one and another in excel format. I'll post them both on here... Big Thanks to Arlan at Led Performance

[bigned1904]

u have a graph for the a/f reading? just want to see how good this guy is at tuning, may have another option for a dyno up there