Originally Posted by cwsharp

The gear is attached to the shaft. If the shaft isn't true, for whatever reason, the gear won't be true. So, you can measure runout where the gear is mounted on the shaft. I see that all of those videos have been removed. Wonder why?

Originally Posted by cwsharp

I don't understand the relevance of these videos... other than they explain the difference between the original cranks and the pressed cranks in terms of manufacturing.

Answer..... The whole purpose IMO was to show that U can't compare the way of the old method of checking the crank vs the new way.
Between centers vs in V Blocks on bearing points.




The 'tolerance' of the primary chain sprocket shaft is not the issue. The tolerance spec of the QC from the factory might address this or might not. It isn't the issue. The tolerance of the runout at >machined< surfaces are the only QC specs of any consequence and on a pressed fit crank the tolerances in truing are just as dependent upon the pressing activity. The runout for cams is checked with the engine in the bike resulting in the same effect as putting the >assembled< crank in vblocks but it has always been checked that way.

Answer.....IMO.. The Tolerance of the output cam shaft IMO is the Whole Issue. This is why some say the Crank is junk.. While the truth is, ITS NOT... The vids show that the crank is still with-in 1/1000 of an inch, but because the output shaft it not ground on center because its not needed with the sprocket and chain cams..

But I'll agreee it not good for those who want GEAR cams as of old.




I am not aware of all of the specs (where they are measured) but as I understand they have all been 'loosened' because of the capability of the press fit approach which would imply that it is less likely that the crank is within geared cam tolerance requirements. That is the point that is being made.

Answer,, True, I agree,, But not all specs have been Loosened,,, just the Run out at the Cam side output side. Because its doesn't have to be as close as the pre 07's 96'ers because the Roller chain and new HYD tensioners was supposed to have eliminated the need of Gear Cams.



The videos were only talking about the unassembled crank halve tolerances. Yes, the quality of those seems to be very good based upon their analysis. Still not relevant to the use of the geared cams, however... except in a foundational way (they are starting out with good quality).

Answer,,,, If U listened and watched the first vid,, He stated some of the cranks were new, some used, and some that had the Chit beat out of them. So they tested all end of the sprectrum for their test..



Of course, I could be missing something. After 8 commercials I was losing interest.

Answer,, I don't doubt that at all... I also tired of watching them..

But I Wanted to learn more about the cranks in the 96'ers..
It seems in here that not matter what the MoCo does to make the bikes and motors better Their seems to be the old bunch that thinks anything new or any changes made is BAD or just not good.

All I wanted to do was learn more about the change and why it was done and IF it was a good decision or just a Cheap decision to save money and Pi$$ on us consumers.






C#