I need help with my rm 125 issue!!!

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9/4/2017 2:03 PM
Edited Date/Time: 9/4/2017 2:06 PM

I got a rm 125 2 stoke 1999 Was riding my bike today and it was running fine but black oil was dripping out the exhaust i dont know if this is normal or not i put it up against the wall while it was running to let it warm the gear box oil up because i was going to replace it then i revved it and it just bogged out now it wont start it stated after about 10 kicks and bogged out start away and now just wont start so i changed the air filter and i changed the gear box oil and it still wont start any ideas i left a little of the old petrol mix in there which was sitting for 3/4 years in the bike as it was not started for 3/4 years but was only a tiny and was running sound and put about 3 lieters of new petrol mix in was a little rich on 2 stoke about 36-1/ 38-1 its ment to be 32-1 but i dont think that matters does it dont know if the carb is dirty or whats going on got any ideas i bought the bike 2 days ago and have done nothing to it it was running fine till this happend i do not know if the fuel and air mix was right as when it was ideling turnt on not in gear it kept cutting out so i had to tighten it in but it did not need tightening before but it did today when i started it up help please this is my first 2 stroke bike??

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9/4/2017 2:19 PM

Drain the gas, clean the carb if you can and new spark plug.

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9/4/2017 2:50 PM
Edited Date/Time: 9/4/2017 2:51 PM

What Joe said....
Look into the gas tank with a flashlight and make sure there's nothing n the bottom of tank that could be clogging the screen on your petcock.

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9/4/2017 3:13 PM

Perhaps a fine cat that purrs upon first touch would be a more suitable hobby.

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9/4/2017 4:36 PM

Sounds like you need a stoke installer tool to convert it to a 4 stroke

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9/4/2017 5:51 PM

rmoto003 wrote:

Sounds like you need a stoke installer tool to convert it to a 4 stroke

Stupid

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Motorcrosser

9/4/2017 6:07 PM

For me , black oil leaking out the exhaust was the result of a leaking crank seal.

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9/4/2017 6:21 PM

Im sure the old gas didn't have anything to do with it

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Don’t piss off the old people - the older they get the less “life in prison” is a deterrent for them!

2020.5 KTM 450 SXF FE
2006 KX250

9/4/2017 6:57 PM

Every RM125 all the way back to 1984 leaks black oil out the exhaust in stock form.... they are simply too rich from the factory. If nobody ever changed the jetting, this is 98% likely to be your problem.
Change the spark plug, put fresh gas in it, mixed at 32:1. I bet she'll fire right up.

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Braaapin' aint easy.

9/4/2017 7:07 PM

BUT IS IT FASTER THAN A SUSUZKI GSXR 1000????

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9/4/2017 7:41 PM

Falcon wrote:

Every RM125 all the way back to 1984 leaks black oil out the exhaust in stock form.... they are simply too rich from the factory. If nobody ever changed the jetting, this is 98% likely to be your problem.
Change the spark plug, put fresh gas in it, mixed at 32:1. I bet she'll fire right up.

Listen to this guy. He beat me to it.....

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