Had to pull the engine to fix a stripped bolt hole and saw this. Why does the rear (right) piston have an obvious yellow tint on it? The tint is heaviest at the top and is roughly the size of the exhaust port. The tinting covers the exhaust port when the piston is a little below TDC.
A little background... The rear cylinder requires one size smaller low jet to prevent fouling the rear plug if I spend too long in the low revs. The high jets are the same. If I run out of gas, I will either foul the rear plug or come very close to fouling it. If I don't foul it, it will take some time to clear out the engine and requires high revs to do so. Speedwerx engine with dual 44 GRS carbs, total loss, B pipe, and ADA head running 200 psi.
A little background... The rear cylinder requires one size smaller low jet to prevent fouling the rear plug if I spend too long in the low revs. The high jets are the same. If I run out of gas, I will either foul the rear plug or come very close to fouling it. If I don't foul it, it will take some time to clear out the engine and requires high revs to do so. Speedwerx engine with dual 44 GRS carbs, total loss, B pipe, and ADA head running 200 psi.