[Swale]

I've got a yfz on order and should get it next week i've told the dealer to put in a yz exhaust cam,and pull the baffle out the stock pipe will i need a rejet if so what settings (ps)I'm at sea level

 

[cjpoole1]

i would to be on the safe side. They come a little lean from the factory

 

[killerkx327]

if you would like to save some money don't buy the yz cam , the only difference between the yz and yfz cam is where the timing marks are on the cam. otherwise they have the same lift and duration.
just turn the exhaust cam clockwise one tooth and then you have the same timing as the YZ.
and with just the exhaust baffle out and the cam mod you won't need to rejet. but take the airbox lid off and put the fuel screw at 2 1/2 turns out go to a 162 main. and you'll be ready to rip and you'll have about 42 hp.

 

[FAST1]

so are you saying if you only remove the baffle, no other changes, you can run the stock jetting and not be lean at WOT?

 

[edgerat]

EHHHHHHHHHHHHHH!!!!!!!!!! wrong. The lift and duration are the same but the gear position is different. Trust me they are different. :woo