Funny Motorcycle Engine Noises

1. By the time I had gotten back to the shop from our office to pick up my camera, Devin and Shop Tech Kazoo had the top-end off to inspect the pistons and the cam cover was removed.
1. By the time I had gotten back to the shop from our office to pick up my camera, Devin
2. The heads were dirty and one of the exhaust valves was cracked and chipped, the pistons were showing signs of wear and had a lot of carbon build up.
2. The heads were dirty and one of the exhaust valves was cracked and chipped, the piston
3. Once Kazoo had the cam out of the bike he could see the damage to the cam lobe (arrow) for the rear exhaust. That would match the cracked rear exhaust valve.
3. Once Kazoo had the cam out of the bike he could see the damage to the cam lobe (arrow)

4. The tappets were the next thing that Kazoo put under the microscope and found that the roller bearing for the rear exhaust was bad with a groove worn into the side (orange arrow) and so much play in the roller you can see the bearing (white arrow).
4. The tappets were the next thing that Kazoo put under the microscope and found that the
5. The new SEH-57 costs around $265.
6. Kazoo got started with the rebuild. Here he installed the SEH-57 cam and checked for clearance. The new SEH-57 cam lobe is a bit taller and the case had to be relived for clearance. (arrow)
6. Kazoo got started with the rebuild. Here he installed the SEH-57 cam and checked for c

By Ernie Lopez

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