KX Riders

Maintenance & Technical => KX500 Original => Topic started by: Fowler Racing396 on December 07, 2009, 10:37:01 AM

Title: ??? k5 crank???
Post by: Fowler Racing396 on December 07, 2009, 10:37:01 AM

is there any difference in the 88 89 k5 cranks compared to the newer models 90 and up?  thanks

Title: Re: ??? k5 crank???
Post by: DoldGuy on December 07, 2009, 11:45:30 AM

Fowler,
The 89 has the same updated P/N as the 90 and on. Obviously the 88 is in discontinued status so?
DoldGuy

Title: Re: ??? k5 crank???
Post by: RoostDaddy on December 08, 2009, 08:59:16 AM

cant remember 100%, but a buddy had an '88 and his crank did look different.  I'll try to dig up something if nobody responds.

Title: Re: ??? k5 crank???
Post by: Fowler Racing396 on December 08, 2009, 11:09:50 AM

had one of my buddies tell me that he thinks they will match up in the cases with the bearins, seals and flywheel. . .but it could be a weight difference but wont sure. .

Title: Re: ??? k5 crank???
Post by: RoostDaddy on December 08, 2009, 11:21:42 AM

I would think it would match as I believe the bearings are the same.   The older flywheel alone is a big weight savings.  Something tells me that the crank appeared different and looked to have been lighter.(never weighed it, may have just been an optical-illusion) 

Title: Re: ??? k5 crank???
Post by: don46 on December 08, 2009, 11:48:48 AM

I actually think the 88 crank will work in the newer motors, 86/87 had a nut holding the gear on the clutch side but the 88 used the same snap ring as 89 and newer. I think I could use a 87 crank in my newer motors it looks to me like it would fit with no problems. I wonder if there was a part number change and in reality they are the same (88 and newer), I have both and they look dimensionaly equal with the only difference being the nut holding the gear on. Not sure though, haven't weighed them to see if there is a difference.