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all of the mount or just certain ones?

You would have to see how the motor fits in the frame. You would then find where the motor mounts on the motor are and then weld some tabs to mount that motor to the frame. I've seen plenty of people do it with the CRs so I don't know why the Yammies wouldn't work.

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OK i have a 06 yfz450 motor that has a hole in the bottom end by the shifter shaft and i know 04-05 yfz has 11:9.1 comp and the 06-08 have 11:4.1 if i where to use a 04-05 bottom and and mate it with my 06 head and use my 06 piston would i get the 11:9.1 comp or would i have to use the 04-05 piston?

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good question!! i think the bore, stroke and head are the same, i think it was a piston change.. not for sure tho. let me know what you find out its something besides the piston. just get an R6 motor if you have to modify motor mounts:biggrin:

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i has to be something in the bottom end like the crank or piston b/c 04-05 yfz have 11:9.1 comp. with only a 439cc and the 06-08 have 11:4.1 with a 449cc. And the only thing i can think of is its either the crank or the piston

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OK, im about to atempt my first rebuild i have a manual and everything i have to put a new hot rods crank in put all the new athena gaskets i bout a 05 yfz bottom end b/c my 06 is cracked puttin my 06 head on the 05 bottom end, how hard is this to do and when i split the case whats the best way to do so and will anything come flyin out at me?

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OK, im about to atempt my first rebuild i have a manual and everything i have to put a new hot rods crank in put all the new athena gaskets i bout a 05 yfz bottom end b/c my 06 is cracked puttin my 06 head on the 05 bottom end, how hard is this to do and when i split the case whats the best way to do so and will anything come flyin out at me?

Nothing should coming flying out. Lay it on it's side. It may sound like a pain but get a digital camera and take pics step by step. If you get lost anywhere you can just refer back to the photos.

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which side should i lay it on the exhaust side?, I plan on taking pics for my rebuild/ racing video im goin to make with some kck azz backround music

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i found out how to thanks guys, the bolts are only on one side, so i would un bolt everything and lay it on the gear shifter side and and split the cases

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i found out how to thanks guys, the bolts are only on one side, so i would un bolt everything and lay it on the gear shifter side and and split the cases

Right on, good luck. Let us know how it goes.

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The big deal is you have to remove a bunch of stuff just to split the case i think, like removing the a.c. magneto, clutch and some other stuff ect.

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So i was taking the nut off the flywheel i had the motor on its side and all of a sudden i hear something it the ground i dont know if its a bearing out of the motor or what it about 1/4 inch round and i was thinking theres noy way a bearing just feel out of this motor nothing is lose yet all the gears are still together everywhere were theres a bearing everything is still tight i dont get it and if it is a bearing i would of known i would of been able to spin the crank or anything else you can spin to move the crank, its weird

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