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  #31  
Old 22nd November 2020
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interesting i remember Kel Carruthers riding a 2 stroke Yamaha.didn't know about the Honda.
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  #32  
Old 23rd November 2020
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He also raced Beneeli's and won the world championship on one of them.

Nobody in Australia could touch him on a race track.

He was actually faster than me.
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  #33  
Old 24th November 2020
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Quote:
Originally Posted by needspeed View Post
Getting back to the original question, " if all 23 rollers are .0001" oversize will it be too tight?"
It's impossible to answer without knowing the exact ID of the race.
It's brand new. PS I don't have an inside micrometer. Should be stock size.
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  #34  
Old 24th November 2020
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Quote:
Originally Posted by needspeed View Post
Yes that's true.

I think Goldmember was asking if he could put slightly oversize rollers in without honing the race bigger. If he already had standard rollers at an unusually large running clearence then it's POSSIBLE he could and end up with an acceptable running fit without touching the race.

But we don't have all the facts. The size and condition of the race or if it's a new race and why he even needs new rollers. So he asked a question that can't be answered, yet.
My race was line lapped and is sized for standard rollers and my mainshaft is brand new.

My concern is because the first oversize is +.0004, so would .0001 over size at the outset be too much. We'll see I guess.

For all I know, having the rollers warm frorm being in the house and the crankcase cold from being out in the shed will matter.

My Chinese micrometer is likely a little wonky. The clutch needed a little grease so it would slip properly. I may give up trying to measure these rollers until I can pick up a Starrett mike. I've calibrated it a number of times and I'm not confident it's holding calibration. Would like a Starrett to compare it to.

Thanks for all who answered. I wasn't aware of just how sensitive measuring is to temperature. Will keep trying to understand this.
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  #35  
Old 24th November 2020
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There are correctives you can use if you keep your workshop at other than the 68 degree standard. So, for every 1 degree above you just subtract a tiny bit. (or add, depending)

But this presumes of course that the guy honing the race got it "Perfect" too.

I would probably just do a trial fitment. They will fit or they won't.
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  #36  
Old 24th November 2020
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Quote:
Originally Posted by Gold Member View Post
My race was line lapped and is sized for standard rollers and my mainshaft is brand new.

My concern is because the first oversize is +.0004, so would .0001 over size at the outset be too much. We'll see I guess.

For all I know, having the rollers warm frorm being in the house and the crankcase cold from being out in the shed will matter.

My Chinese micrometer is likely a little wonky. The clutch needed a little grease so it would slip properly. I may give up trying to measure these rollers until I can pick up a Starrett mike. I've calibrated it a number of times and I'm not confident it's holding calibration. Would like a Starrett to compare it to.

Thanks for all who answered. I wasn't aware of just how sensitive measuring is to temperature. Will keep trying to understand this.
Just curious how do you calibrate it?
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  #37  
Old 25th November 2020
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Quote:
Originally Posted by Steve9 View Post
Just curious how do you calibrate it?
The directions that came with it say to close it all the way and set the 0. On youtube a guy sets the .0009 right on the line on the barrel. Well anyway it's a little fiddly to do and wanders easily. Would like a .5000 standard but haven't seen one yet.
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  #38  
Old 25th November 2020
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Proper way is to measure a known object, usually a "gage block"

Zeroing out the micrometer is not calibrating the micrometer.

You are trying to measure "tenths" with an uncalibrated mic. And temperature just make sure you are in air conditioning, not warm garage.

Not trying to be a d#ck, you could bring it by a small machine shop. Someone would probably measure it for free
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  #39  
Old 25th November 2020
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Yep, Steve, only way to calibrate at home...





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  #40  
Old 25th November 2020
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Quote:
Originally Posted by Steve9 View Post
Proper way is to measure a known object, usually a "gage block"

Zeroing out the micrometer is not calibrating the micrometer.

You are trying to measure "tenths" with an uncalibrated mic. And temperature just make sure you are in air conditioning, not warm garage.

Not trying to be a d#ck, you could bring it by a small machine shop. Someone would probably measure it for free
You're not being a dick, I appreciate any and all tips and wisdom from the people who know what they're doing. It's the only way one can learn how to put one of these bikes together. You can't do it on your own without help.
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