yfz yzf?? whats the diffrence?

[kawasaki_ridah]

why dosnt the 4 wheeler sound like the dirt bike? is because the atv has a spark arrester and the db dont? and i heard the cams are diffrent? isnt the atv a 5 speed cause the bd is a 4 speed

[riggsracing]

yeah thats right

[Scottie Mac]

The YFZ (quad) has an extremely restrictive exhaust (see pee shooter) where the bike has a pretty much open system, much like that of an aftermarket exhaust. This is also why a bike gains very little in terms of pwer by adding an aftermarket exhaust.

Scott

[kawasaki_ridah]

could you use the bike exhaust on the quad?

[Scottie Mac]

Well, seeing that Yamaha thinks its parts are made of gold and price them accordingly, It would be a better idea to just buy an aftermarket exhaust (slip on) that is designed for the quad motor.

Scott

[RIDER11X]

The YFZ is basically a WR450f motor, not a YZF. Although with YZ cams, cam timing, and aftermarket pipe, the motor becomes very YZF like. Even the cam mod on the stock cams is very effective. ;)