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Old 08-07-2018, 09:11 PM
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Default 2001 Honda CR500R crank/countershaft seal depths

     

I cannot find this info anywhere and I have searched high and low. I also have the official Honda Service manual for 92-01. In the service manual the only thing indicated is to mount the ignition side crank seal flush with the case lip. That is fine.....but totally no definitive info about the countershaft seal or right side (clutch side) crank seal depths. Anyone know this? ..if so much appreciated. I am on the tail-end of a long (9 month) and meticulous superlight and modern 500AF build. This is one part I definitely need to make sure is right. Right now I can only assume flush or 1mm deep based on CR250 history.
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Old 08-09-2018, 09:03 AM
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Nevermind.....figured it out by measuring with a caliper (distance from weep hole in bearing cavity from top end to outside lip of bearing seat on transmission side vs the seal with itself). The crank seals must be flush with the outer edge of the lip when inserting them to leave that lubrication passage just barely totally clear with none of the seal body blocking it. If care is not taken here, this will eventually lead to a failed crank bearing via not staying lubed and seizing. This is why this must be perfect and so important.
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Old 08-09-2018, 09:11 AM
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Nice work! any photos of the build?
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Old 09-21-2018, 10:02 AM
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I'm pretty sure if you search Dogger's 500 engine build threads he mentions a specific measurement. It's been quite sometime since I read them but I do know for sure he mentions this in one of his build threads, just can't remember if it was the 500 or 250. Perhaps it was both. BTW Cowboy, whoever you contacted for me worked, got the confirmation email last night, thanks !
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Old 09-23-2018, 11:13 AM
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Quote:
Originally Posted by Greg376 View Post
I'm pretty sure if you search Dogger's 500 engine build threads he mentions a specific measurement. It's been quite sometime since I read them but I do know for sure he mentions this in one of his build threads, just can't remember if it was the 500 or 250. Perhaps it was both. BTW Cowboy, whoever you contacted for me worked, got the confirmation email last night, thanks !
This is a link to doggers CR 500 engine build thread.

CR500 Engine Build Pictorial Part 2

This is a link to Doggers CR 250 engine build. I know the seal depths for the 250 are in this thread.

92-01 Honda CR250 engine build tutorial
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Old 11-21-2018, 09:13 PM
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I purposely vary the OEM depth a bit at times to get the lip of the seal to ride on a fresh piece of steel. Cranks, collars etc get worn into over time.
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