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Author Topic: Mechanical Timing  (Read 1079 times)

Crossrodes

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Mechanical Timing
« on: July 31, 2010, 05:10:15 PM »
Awhile ago, while working on my engine I ran into a problem and screwed up my thrust washer on the crankshaft.  So I have had to replace the thrust washer which I have done.  

While I was at it I decided to order a timing chain kit and have now installed it.  The problem I have is that while I marked the crank shaft sprocket with a marker pen as outlined in the Clymer manual, the mark has gone...probably due to a coating of oil (next time I'll use a scribe on this sucker).  So I have installed the chain and lined up the sprockets according to where I "think" I marked the sprocket.  After re-installing the heads etc I have turned the crank to TDC and adjusted the valves.  

So now I have turned the engine over by hand several times and there is no interference between the pistons and the valves.  The question is can I now assume that I have the crank/cam sprockets lined up properly or is there something else I can do to verify correct timing between the crank and the cam?

Offline Bob_Roller

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Re: Mechanical Timing
« Reply #1 on: July 31, 2010, 06:17:08 PM »
I know it's quite difficult to see the marks on the gears, but are they close where they should be ?

And congrats on replacing the thrust washer on your engine, not a small task to say the least bit !!!
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I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Crossrodes

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Re: Mechanical Timing
« Reply #2 on: July 31, 2010, 09:43:54 PM »
Bob, I believe that the sprockets are close if not right on where they should be based on the valves not interfering with the pistons when I turn the engine over.  I don't know if there would be interference if the timing was off by one or a few cogs though.