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Have you tried grease on the gasket?

macdaddy wrote:rocker arm end clearance?

+1

Ken, I installed a 12mm MC on my R90/6 to the stock single ATE and got significantly improved breaking and feel. I am very happy with this set up. I used an R65 MC and an R80ST single line to the ATE. I was also able to use my stock two throttle cables and eliminate the need for the splitter...Jeff

Hudson, reread George's post slowly. He is right on the method that I've used for years.

Welcome Alphons; Nice bike!

Major Softie wrote:Just to clarify: esman100's explanation is all correct, but I wanted to make sure you noticed that he was talking about cylinders, not heads. You asked about heads, but, like esman100, I presume you really are asking about the cylinders.

Thanks Major; I was refering to cylinders.

It's called Nikasil and is a nickel carbide plating. The first year used, I believe, was 1981and not without problems. Their were reports of the plating lifting and I personally have an '81 cylinder with a spot that lifted. They did get the process perfected and I have a nice set on my '78 S bike. I...

I'm at work and don't remember, but I think mine are 27mm. Measure across the flats and head to an automotive store.

I use an impact gun with a socket that I machined off the end radius to gain more purchase on the nut. I normally work by myself and don't have someone to help hold it, so this works well for me. Make sure you smooth the socket end edges after machining flat to keep from marking the triple tree plate.

Frank, I have found the grey drive gear to usually be the culprit. I have repaired 4 or 5 with great success over the years by reaming the grey gear hole to a slip fit, +.0005" to .001" to make room for Loctite bearing mount. I then put a 1/4" ball bearing on the outside hole of the g...