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Old 05-24-2005, 10:00 PM   #1 (permalink)
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03zq8's Avatar
 
Join Date: May 2005
Bike: 04 GSX-R600, 95 RM125, 78 RM125
Location: Van Buren, OH
Posts: 39
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Default 1995 RM125 slower than my 1978 RM125???

Well, like the title says, my 78 (air cooled all stock) is faster than my 95. I'm in the process of diagnosing the 95 and could use a little advice.

-It starts up on the 1st or 2nd kick
-It *runs* flawlessly
-Compression is 155-160 psi, and holds all day, I couldn't find a spec anywhere, but I think this is good

The bike has absolutely no lower end power at all. I know it's a two stroke, and it shouldn't make much, but it's bad. I can't take off quick without feathering the clutch severely, or it just stalls or boggs. When I race my 78, the 78 kills it off the line. If we start from the top of 1st, the 78 pulls on it about 2ft per gear.

Any Idea's? I don't know much about the newer 2 strokes like this one (ie power valve, exhaust valve, etc.). Are the reeds worth pulling out and checking?

BTW the 95 has an FMF gold pipe on it, not sure if the carb was tuned for this.