Dave Ett wrote:

Harold wrote:I would recommend rather to run premix as it is a safer way to spare the engine. It is to easy for the oil pump lines to get blocked

Have you or anyone ever heard of this happening? I don't think I've even heard of an oil pump failing on an NSR...

Ive had an oil pump oil my rear tire before. Not sure it was the oil pumps fault however. Something about putting a later model MC21 oil pump on an earlier mode MC21 set of cases...

Seems that oil feed for the right crank shaft bearing not having anywhere for the oil to go but all over the engine, and then onto the rear tire.

Best fix for that? remove oil pump and go pre-mix.
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Charles Gallant