Vintage Dirt Bike Q & A
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MT125 Oil Pump
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Author:  jammin [ Tue Apr 05, 2011 2:16 pm ]
Post subject:  MT125 Oil Pump

Any suggestions on priming an oil pump? It's been disassembled and cleaned, and the tank has been put under modest pressure with a bike tire pump after removing the spark plug, and then spinning the crankshaft with a power drill. No oil output. Very aggravating as this is the last step before cranking a 2 year restoration!

Author:  rayivers [ Tue Apr 05, 2011 2:48 pm ]
Post subject:  Re: MT125 Oil Pump

If I were you, I would run premix until you're sure the pump works. This is what I did when I resurrected an MT250 last year, and although it ended up not being necessary - the MT's pump put out plenty of oil - I was glad I did it just in case.

The MT oil pump is an unusual design and puts out very small and precise amounts of oil. I think it may be difficult to test it conclusively on a non-running motor.

Ray

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