Two Stroke Motocross

Two Stroke Motocross Forum => Technical => Topic started by: TheRadBaron on August 13, 2011, 12:08:00 AM

Title: '96 RM125 cylinder interchange?
Post by: TheRadBaron on August 13, 2011, 12:08:00 AM

My RM has a junk cylinder and I'm having a hard time finding a replacement.  The '96 cylinder was a one-year part.  Does anyone know if any other years of RM125 cylinders will work on a '96? The part numbers are different for different years, but the exhaust valves, cylinder heads, base gaskets, and other parts are the same from '96-'98. I know that sometimes a manufacturer will change a part number for an insignificant change that has no effect on the part's interchangeability.  Or maybe the porting was slightly revised and a '97 or '98 cylinder will still work on my '96.  Anyone have any insight?

Title: Re: '96 RM125 cylinder interchange?
Post by: rbigair40 on August 14, 2011, 12:31:57 AM

I had put a 94 on mine a few yrs back ,and also i had put a 92 on my 89 so any yr from 1990 up to it will work (89 had a steel sleeve) if you have the complete set up part numbers will differ with port timing ,color or even vent tubes

Title: Re: '96 RM125 cylinder interchange?
Post by: TheRadBaron on August 14, 2011, 01:10:41 AM

That's good info.  Thanks very much.  What year was yours that had the '94 cylinder?  Also a '96?

Title: Re: '96 RM125 cylinder interchange?
Post by: rbigair40 on August 14, 2011, 01:44:27 AM

a  96

Title: Re: '96 RM125 cylinder interchange?
Post by: TheRadBaron on August 14, 2011, 09:12:30 PM

Cool.  Did you use the '94 exhaust valve setup or the '96?  The valves and other pieces are different part numbers, but I'm hoping that they'll interchange.  The pre-'96 valves are a two piece design, while the '96 valves are one piece.

Title: Re: '96 RM125 cylinder interchange?
Post by: rbigair40 on August 14, 2011, 09:49:41 PM

i used the 94 assembly valves and all