Congrats sts and ferroso!
I posted in the other sts 28 thread but will say again here. I recieved an sts.28 and .12 d5r last week. I am very very pleased with how clean both engines are. Two big thumbs up. Best condition of any engine I have bought! The sts.28 looks like it will be at home in my Savage bringing wheelies at 3meters spitting rich.
I began breakin of the sts.12 d5r last night and wow.....what a pinch! 3 heat cycles and the pinch is still as tight as it was before starting. I can see that the sts piston material must be very strong and have a long life. Cant say how it is going to run on track yet but sounds nice even spitting rich with sts 6mm pipe combo.
Dino a quick question.... How many manifold shims do you recomend for the 6mm sts pipe and the d5r combo?
Thanks for all the help and cant wait to get this baby on the track