ANLAF
XS650 Guru
I have grey (not black) smoke at start up, and some miss-firing at low revs.
Looking at the threads these symptoms point to low-level oil ingress. There are various suggestions: valve guide seals, head gasket, and the oil scraper piston ring. I am inclined to valves.
This engine hadn't run for a couple of years until I got hold of it recently, and I've only just got it ready to ride - only a few short test runs and one 60 mile round trip.
I have the carbs set-up correctly so it is not running rich (as I first thought). At first it was just the plug on the right cylinder becoming blackened, today, on another short run, it was both plugs.
I checked the torque as correct on the cylinder head bolts.
QUESTIONS
1. How many miles should I run this engine to see if it settles down? (I read an engine not run for a while might need to be run to evacuate particles that might be collected around the valves, which allows low-level ingress).
2. Should I need to get into the cylinder head are there any threads or videos showing how to sort out valve guide oil seals?
Anlaf
Looking at the threads these symptoms point to low-level oil ingress. There are various suggestions: valve guide seals, head gasket, and the oil scraper piston ring. I am inclined to valves.
This engine hadn't run for a couple of years until I got hold of it recently, and I've only just got it ready to ride - only a few short test runs and one 60 mile round trip.
I have the carbs set-up correctly so it is not running rich (as I first thought). At first it was just the plug on the right cylinder becoming blackened, today, on another short run, it was both plugs.
I checked the torque as correct on the cylinder head bolts.
QUESTIONS
1. How many miles should I run this engine to see if it settles down? (I read an engine not run for a while might need to be run to evacuate particles that might be collected around the valves, which allows low-level ingress).
2. Should I need to get into the cylinder head are there any threads or videos showing how to sort out valve guide oil seals?
Anlaf
