do twins run richer on one side over the other?

[orthobird]

I have noticed that on some of my twin 2 strokes, that one muffler will produce more smoke than the other at idle or low rpms. once i rev up to half stick, this becomes even on both sides or no smoke at all. anyone else ever notice this?

 

[WoodisGood]

On our twins the forward cylinder will always run leaner and a bit hotter than the right side. This is due to the way the fuel air mixture rotates inside the crankcase and is distributed to each cylinder.

 

[orthobird]

Aha!!! that makes sense now. thank you for that.

 

[2robinhood]

Can't doubling up the cylinder gasket on thr front cylinder bring the temperature on that cylinder down a little ?

It shouldn't change the timing of the cylinder, since the TDC is still the same, you just changing the compression by shimming the cylinder out ?



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