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Old 03-19-2013, 10:44 PM   #1 (permalink)
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Cam end play?

Putting together a 80inch EVO and when I check the cam end play I have about .075 with just the thrust washer. It is a pre 90 motor so it didn't use a shim originaly. My question is could I double up thrust washers instead of hunting down a shin? I try'd it for shots and giggles and it brings me into specs perfectly. Any opinions?

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Old 03-20-2013, 01:30 AM   #2 (permalink)
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Cam end play?

Odd... I am sure that my 86 Evo has two washers, the odd shaped one and a standard shim one.

I suppose you could double up on the thrust washers, so long as you get the right end play. Mind you if it was my bike I would sped the $20 for a shim pack and do it proper.


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Old 03-20-2013, 05:09 AM   #3 (permalink)
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Measure and find out what you need, then get the appropriate shim, either from your local dealer or order on-line. The goal is proper end play within specs. I don't think the engine/cam cares what the spacer/shim is called.
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Old 03-20-2013, 06:08 AM   #4 (permalink)
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If the extra thrust washer gets the end play within spec you can use it. You'll want to get the end play to about .015". I would remove the ear from the washer though.
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Old 03-20-2013, 06:58 AM   #5 (permalink)
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if youve got .075 with just the t. washer,get a .070 cam shim,end up with .005 clearance,no big deal.not really understanding what the question is??
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Old 03-20-2013, 07:40 AM   #6 (permalink)
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He wants to know if he can use a thrush washer as a shim. Which we suppose he can...BUT i still hold firm that spendign $20 on a proper set of shims would be the ticket - or the correct shim at a very minimum.
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Old 03-20-2013, 09:25 AM   #7 (permalink)
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Re: Cam end play?

Thanks guys,I know I should get a shim but Nearest dealer is 90 miles away.same for any indy. I'm just trying to keep from getting sidelined another week. I only have Sundays off work. Schmidty.. the second thrust washer puts me at .013 of end play.

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Old 03-20-2013, 09:47 AM   #8 (permalink)
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That's good to go. I think the book spec is something like .005 - .050 ! I usually try to keep it to between .010 - 015, that's tight enough to keep the cam from rattling back and forth.
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Old 03-20-2013, 10:17 AM   #9 (permalink)
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Agreed. End play specs insanely vary at a .005-.050" range. .010-.015 is perfect and a desired range. If you add the .065" shim, that puts you at .010" and that's perfect.

I have a .065" cam shim sitting on the desk in front of me. I'm in PA. I can mail it if you need it........ PM me your name and address if you need it. Not sure how long it takes to get to CA from PA. 3 days?

Truthfully, that puts you at .010", but if you have one that puts you at .013", that's fine too. Always make sure to check end play with the cone on, and tightened. That alone (or the thickness of the gasket) will change end play readings.

Thinner gasket.....closer tolorence. Less end play.
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Old 03-20-2013, 10:45 AM   #10 (permalink)
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Re: Cam end play?

Thanks Dave. I'm tryin to talk my buddy(its his motor) into running to reno to get a shim for me. If not I'm just gunna cut the ears of the old thrust washer. I don't see what it would hurt. Thanks for the offer tho. I probably had my mind made up from the get go,but I like this place so much I wanted to get your guys opinions. Lol
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