CR 480 crank the same as CR 450?

[Chevy200s]

Hi I was wondering if the crank out of an 81 CR 450 is the same as the crank from an 82 cr 480? Thanks!

[Bryan Raffa]

the 82 480 is a 89x76mm bore/stroke I cant find nothing on the 81cr hope it helps..

[cr480r]

They at least share the same stroke as the 480's...the 450 is 85mm x 76mm...

[Bryan Raffa]

might be like the yamaha from that era ,,all used the same crank,465,490,500

[Chevy200s]

Thanks guys, I guess they are different, they both have different part numbers, although I have heard of situations where this was not the case. as in, same part different numbers. I guess I have to fork over the extra cash to do it right:lol: thanks!

[cr480r]

Thanks guys, I guess they are different, they both have different part numbers, although I have heard of situations where this was not the case. as in, same part different numbers. I guess I have to fork over the extra cash to do it right:lol: thanks!

Remember... Identical and interchangable are two different things... they may just be weighted differently... You might check the interchange on the bearings and primary gear... I think the flywheels physically interchange, and I know the 480 piston fits on the rod... I bet the 450 crank is lighter... If so...just weight match the pistons for correct balance....the 450 was known for having a lightswitch powerband...unlike the mellow 480...

[rot box]

Man I should be able to answer your question after having owned about 10 480's and 450's, but I think old age is creeping up on me :wondering

Good luck though, and thankfully 480's arent on the endangered species list (yet) so I'd probably just find a replacement 480 crank and be done with it :)