Is it oil or fuel?
Grand HDF Member
Joined: Dec 2007
Posts: 4,999
Likes: 55
From: Bay Area
It is more than likely your ex valve guide seals. Been there done that. Its exh seal and or guide, you wont get a plug reading because the oil is not going in the cylinder. If you have true duals ask your buds which pipe was smoking, then pull that pipe off and look at your valve stem. Ill bet you anything that cyl will have an oil trail on it. if you dont have true duals you need to pull both pipes.
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Road Captain
Joined: Aug 2005
Posts: 616
Likes: 1
From:
Do people behind you see blue smoke on decel? If so, it would indicate worn valve guides, but 17k miles is very premature. To check, have someone follow you at night, which will make the smoke much more visible with only headlights. Run it up to 4k and let off. Who tuned your PCIII? If he tuned in too much fuel for the rear cylinder, perhaps in an attempt to keep heat down, he overdid it and causes cylinder washing from an overly rich mixture. That wouldn't likely cause problems for valve guides/seals, however. Did you use proper break-in procedure? If you didn't vary the speeds it could have starved the valve guides during their crucial break-in period. I'm just speculating here.
Anyway, a quart per 2k miles sounds high to me. My TC96 uses about 6-8 oz. between 5k-mile changes. Even my old Evo used only about 1 qt/5k miles, even after 106k miles with no engine work at all, and most Evos used more oil that your typical TC. Like you I used Royal Purple in that bike, and at last check it's still going at >115k.
Anyway, a quart per 2k miles sounds high to me. My TC96 uses about 6-8 oz. between 5k-mile changes. Even my old Evo used only about 1 qt/5k miles, even after 106k miles with no engine work at all, and most Evos used more oil that your typical TC. Like you I used Royal Purple in that bike, and at last check it's still going at >115k.
We did the throttle test many times on the ride home and only a few times did the guys see anything come out the left tail pipe which means it's the rear cylinder. I had to really get on it. They said it happend right before I shifted and the smoke was black which indicates fuel. They say it smells like oil. There was five of them and they all say oil smell. I smell gas on the bike?
I did an average job breaking the bike in. It had 80 miles on it when I got it new. The Harley dealer was riding it for a demo.
I will check the plugs today and see what I find, if they look good then I'll have to pull the pipe and look at the valve stem.
I was hoping to go 25,000 miles before a tear down etc.
Big Kahuna HDF Member
Joined: Apr 2008
Posts: 38,428
Likes: 896
Looks OK to me. Carbon is normal in the exhuast port, and it is not wet. I would expect to see evidence of oil on the valve stem if you had a problem, and even tracking out into the port if it was really bad.
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Road Captain
Joined: Aug 2005
Posts: 616
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If the valve guide seal was bad would there be evidence in that picture or do you have to tear down to find out?
I'm close to having to replace the cam chain tensioners so I figure it might be time for a 95 kit. My brother in law can do all the work and has the special tools. I wanted to finish the summer out but I can't stand the exhaust smell when I ride.
I'm close to having to replace the cam chain tensioners so I figure it might be time for a 95 kit. My brother in law can do all the work and has the special tools. I wanted to finish the summer out but I can't stand the exhaust smell when I ride.