Need some help!
Thread Starter
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Tourer
Joined: Aug 2009
Posts: 359
Likes: 2
From: central Mississippi
Compression was 200 psi on each cylinder, within 1 lb of each other, before I pulled it apart. I'll do another compression check tomorrow and see what I've got. The only reason I pulled it apart was because it had developed a loud tick, off and on. Thought a lifter might be going south on me. It was really loud at 68-70 mph. I can't imagine what I've done to screw things up this bad. I've installed lifters and adjusted pushrods before with absolutely no problems. This has me scratching my head.
Thread Starter
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Tourer
Joined: Aug 2009
Posts: 359
Likes: 2
From: central Mississippi
I think I've figured it out. The cam is twice the diameter of the pinion gear. The cam has 42 teeth, the pinion gear has 21. Takes two rotations of the pinion gear/crank shaft to rotate the cam one rotation. I think I have the stroke off by 180 degrees when I reinstalled the cam. I think the solution is to remove the cam, rotate the pinion gear/crank shaft one full revolution then reinstall the cam and align the dots. We'll see in a few minutes.
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Elite HDF Member
Joined: Sep 2007
Posts: 4,468
Likes: 12
From: Bluffton, South Carolina
That's not going to change anything, the dot rotates with the crank so every time it is up the crank is in the same place. The same goes with the cam. Your problem is in the adjustment or cam is not in properly. You may have done it before, but this time you are doing something different. Do you have the right pushrods in the right places?? How many threads per inch are your pushrods ?? Make sure the lifters are on the base circle by watching them. Hope this helps.
John
John
Club Member
Joined: Apr 2011
Posts: 5,816
Likes: 7,847
From: SE Louisiana
You sure your looking at the correct mark on the pinion gear? it's normally a line, and not a dot.
Just to verify there's no damage from valve to valve, or valve to piston contact, loosen or remove all pushrods, take your compression gauge hose and remove the shrader valve in the end, screw the hose in plug hole and connect to your air compressor line.
Listen for major leaks at carb and exhaust, it'll be obvious if a valve is damaged.
No need to find TDC for the test, make sure bike is in neutral, so it doesn't roll when you hook the air line.
Just to verify there's no damage from valve to valve, or valve to piston contact, loosen or remove all pushrods, take your compression gauge hose and remove the shrader valve in the end, screw the hose in plug hole and connect to your air compressor line.
Listen for major leaks at carb and exhaust, it'll be obvious if a valve is damaged.
No need to find TDC for the test, make sure bike is in neutral, so it doesn't roll when you hook the air line.