KX Riders

Maintenance & Technical => KX500 Original => Topic started by: witdogg on August 30, 2009, 01:13:09 PM

Title: Differences in KX500 motors
Post by: witdogg on August 30, 2009, 01:13:09 PM

Hey guys, first post.   :mrgreen:

Does a 89 and newer KX500 motor have the same motor mounts as the 87/88?

Is it a bolt in swap?

Title: Re: Differences in KX500 motors
Post by: RoostDaddy on August 31, 2009, 08:29:05 AM

I believe its an easy swap as the head stay brackets are the only thing I know that are different.  You may just need to fab up a new set of these.

Title: Re: Differences in KX500 motors
Post by: don46 on August 31, 2009, 09:50:14 AM

bottom motor mount is narrower than the newer ones, I think.

Title: Re: Differences in KX500 motors
Post by: witdogg on September 02, 2009, 12:37:22 PM

Thanks guys.

Does anyone know for sure?

Title: Re: Differences in KX500 motors
Post by: toomany on September 03, 2009, 02:59:36 AM

I put an 87 motor into a 92 frame. The bottom mount and front mount lined right up and were the correct width. The one with the swingarm was even in the right spot. I had to fab up some spacers for the shock linkage, but I was using the 87 swingarm on the newer frame/shock. The cylinder head stay had to be fab as well. I could get it to bolt to the head and hit one of the two holes on the frame, but not both.

Title: Re: Differences in KX500 motors
Post by: witdogg on September 03, 2009, 01:15:55 PM

Quote from: toomany on September 03, 2009, 02:59:36 AM

I put an 87 motor into a 92 frame. The bottom mount and front mount lined right up and were the correct width. The one with the swingarm was even in the right spot. I had to fab up some spacers for the shock linkage, but I was using the 87 swingarm on the newer frame/shock. The cylinder head stay had to be fab as well. I could get it to bolt to the head and hit one of the two holes on the frame, but not both.

Thanks a lot for all that info.