Upon further investigating and acually trying it at the shop a higher reading will occur at an angle rather than 90 degrees. It'sthat old triangle thingy coming into play. Anybodyknow of a good spice thatgoes withCROW ? Same thing applys to the lever type indicators in relation to pivot angle.
Ron
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We should never stop learning. I am glad you tried it at a shop to see kind cool when you see it for yourself aint it?


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Yes it is. Logically I can see where one can get the idea of less reading, but once demonstrated as well as a sketch with triangles and hypotenuses (sp?) it all makes sense. What we did was setup an indicator on the milling machine bed at 45degrees and set it to zero. We took a known .125 thick piece of flat and slid it under the indicator probe. At 90 degrees obviously it would read .125, but at an angle it read a lot more. No question about it. Surprisingly even fooled the shop machinist at first when I questioned him about it,but he eventually remembered the theory and set me straight.
Ron
Ron

 

I read these and I have to laugh because I'm thinking "if they only knew how much runout they had with the thermal dynamic load on them under operating conditions it would scare them so bad that they would probably quit riding and sell their bikes." I have checked several new SE billet cam plates and they have .0025" clearance to the bushings, I only allow .0012" as a maximum on the R&R cam plates I use on a lot of the builds I do. The way I deal with this is if the crank is more than .003" I recommend that we pull it and true and weld it. If the customer doesn't want to do this I recommend the R&R plate (up to .006" runout) for gear drive cams. The more torque you have the more the flex you have so I'm causious with the over 110 torque builds as to the condition of the crank and the cam plate used. Hope this helps.

 

I agree, it's a piece of spegtti rolling around in there, especially with the sprocket being that far away from the main bearing. Add in some lack of concentricity between the sprockets changing the pressure rate on the chain and it's brutal in there. I choose not to think about it It's the classic ignorance is bliss that keeps me climbing back on it.
Ron

 

Roll out happens when the two halves of the crank spin. Thats how it creates rollout. Heavy acceleration and heavy deceleration. They need to be welded with the connecting rod pin. And timken bearings are they way to go. It removes end play of the crank. If you a light on the throttle then ok. But since your upgrading Im thinking you want more power.

 

Im sure he got all the power he needed.........17 years ago

 

I was going to say no bleep. But then I noticed the date of 2008.

 

It is runout, not rollout, and there is no need for Timken bearings.