Question about 2003 Suzuki RM 125

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Just got a '96 dr 125(se?)3500 miles and it runns very tired 6 gear is too weak,i compare it to a 75cc.sproket gearing is 16/53, no idea if its normal,but i am disapointed.need help

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1st. - Does it rev out in all other lower gears?

NO.. DO step #4 first... then do the others!!

Yes.. then do ALL the following -- IN ORDER..

1. Put in a new spark plug and clean/treat OR replace the air filter, then check your exhaust system for blockage
2. Run QUALITY 93 Octane gasoline.
3. Find out the factory original gearing ..GO TO your local dealer.. the PARTS man will be able to help you quicker than the service guys! His parts listing will tell you the stock parts and # of teeth on the sprockets.
My Opinion??....16/53 sounds a little tall?? .... 14/15 - 54/56 sounds better..you might lose some top end speed but should turn up the RPM's.
4. Have a PROFESSIONAL run a compression check on your engine. It needs to be in the UPPER RANGE for your engine to perform at its peak! This will tell the mechanic what he needs to know for further diagnosis.

If these are all PERFECT..
Have a professional check the timing with a light. Electronis sometimes mess up??

one , or a combo, of these WILL fix or diagnose your bike.

Signed: 5Keepers, Just a mechanic with 35 years exp.
...who stumbled onto this site by accident!

Posted on Jun 16, 2009

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Posted on Jan 02, 2017

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