Q: I’ve just bought myself a Yamaha BWS 100. I’ve been after one for a while now and, at last, I managed to source one from Gumtree.
According to the previous owner it’s completely standard besides the fitting of a Pincus race exhaust. The guy I bought it from says it’s been ‘jetted’ to suit, but as of yet I don’t know what size.
But my question is about the original Yamaha autolube system. Does this compensate for the bigger jet size or will it have to be adjusted because of more fuel now flowing though the engine? I desperately look forward to your answer because I don’t want any problems with my beautiful new scoot’.
Christopher Nell
A: I could answer this question but I decided to call Jeremy Pincus (082 645 8969) for you, because he’s without doubt the expert in SA regarding everything to do with two-stroke engines.
Jeremy here. Don’t worry about the autolube system in your ‘new’ BWS.
Even in my race bikes I just set the pump to the factory settings and I’ve never had any adverse lubrication problems. If you look underneath, next to the pipe, you’ll see a small window where the pump lies. Just make sure the two marks line up when the throttle is closed and you’ll be fine.
My race pipes tend to make the stock engine rev more, up to 2,000 rpm!
So as engine spins faster more oil is pushed into the engine, because the oil pump turns faster as the engine drives it. Just make sure you use decent autolube oil though, like Motul for example.
Any problems give me a call on the number above?
