With time on my hands I’m taking the opportunity to investigate the high oil consumption on my Suzuki GS 1000.
So first up a bit of background information. The purchase was a bit of a spur of the moment, I really should have gone for a sorted GS 550 but a big shiny picture fooled me. If nothing else I have learnt a lot about spannering. The first problem I encountered was the bike was running very rich, you only need your nose to tell that. The standard air box had been removed and cheap foam pods added and the carburettors rejetted. I stripped them and found two bodies had broken pilot screws (the sharp tapered one) wedged in the body. In addition the main jets had been increased 10 steps above standard, way in excess of a pod requirement. So two replacement bodies sorted, all then ultrasonic cleaned and smaller mains put in and proceed to road test and change mains again settling on 3 steps up.
So about 2,000 miles later oil consumption high, no obvious leaks but brown/black staining around exhaust I start to suspect the valve stem seals. So commence top end rebuild not knowing the history, as I strip I am finding a number of new parts, cam chain, guides and healthy looking stem seals. Piston crowns and head are heavily coked, not soft, I think a combination of oil and unburnt fuel.
So here’s some pictures.
So am I suffering from bore glaze due a poorly run in engine? What do I need to check? Will a simple hone cure the issue or will I require new rings as well?
Many thanks for all advice.
Greg