[yz400 and yz450] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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yz400 and yz450
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Posted by: rancid

can a yz400 with a crank or piston be turned into a 450 are they basically the same motors, and will it bolt into a yfz quad frame.

Posted by: EvilJester400EX

The YZ450 engine will bolt into the YFZ frame, the only modification that you will have to make is to the front sprocket, you will need to put a spacer behind it for the chain to line perfect.

Posted by: zeppelin

the 400 wont its completely differnt tfrom the 450

Posted by: stocktires

They all bolt up the same, but I know internally the 400f is a different motor in a good many of ways compared to the 426f, and especially the 450f.

Posted by: sampleez

yzf450 and yfz450 are not the same. you need different motor mounts, and have to mod the frame

http://www.yfztech.com/forum/index.php?showtopic=2937

Posted by: stocktires

wow, news to me. So do all the bike motors mount up the same, and just the quad motor is different?

Posted by: Chino886

quote:
Originally posted by sampleez
yzf450 and yfz450 are not the same. you need different motor mounts, and have to mod the frame

http://www.yfztech.com/forum/index.php?showtopic=2937

Have any of you guys heard of the YZ450F Motor in a 400EX frame, I heard it works!