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Craig380 · 20-10-20, 12:28 PM

Indeed, my GT380's pistons and cylinder head never had as much carbon build-up than that!

I suspect that it's a combination of repeated short run / stop-start riding and poor-quality US fuel, I'm not sure their pump fuels have the same levels of detergent additives etc that UK / European fuel has.

20-10-20, 12:28 PM	#2
Craig380 Member Mega Poster Join Date: May 2015 Posts: 1,245	Re: Z900RS carbon build up Indeed, my GT380's pistons and cylinder head never had as much carbon build-up than that! I suspect that it's a combination of repeated short run / stop-start riding and poor-quality US fuel, I'm not sure their pump fuels have the same levels of detergent additives etc that UK / European fuel has.