anyone know what the light patch on this piston is? Looks almost ceramic'y/rough.... Theres a few of these on each piston
You will find that those patches line up with the vertical edges of your transfer ports in your cylinder. The light patch is where the flow of fuel/air mixture is at its greatest from the transfers. It essentially washes the carbon off the top of the piston each cycle and doesn't allow it to build up. Nothing to worry about. Your engine is running on the rich side of things - there is a fair bit of carbon build up on the top of the crowns.
Ah good man. I did think the crowns were awfully dark, will have to have a tinker. Also, would you know if you can bolt a waveblaster1 standard exhaust straight onto the barrels (62T from memory) of the 760 engine? I know the bolt sizes are different, but had a friend ask wether the ports lined up which i had never thought about...
From memory there is a difference (vertical height and not width) but not 100% sure. You'll definitely need to use a 62T/760 Ex Gasket. Best way to check is use the gasket as a template against each surface to check before fitting. Only some minor grinding will be required to get them to match.
