HarleyTechTalk

I use a 6 jaw chuck, and made an angle/taper aluminium slug in the rear/id of the cylinder with a true flat area to indicate off of and center hole. I use this with a dial indicator on a live tailstock. 100 % accuracy. Love the mandrel, but way out of my price league.
John

Here's a link that shows what I use now. It goes between centers.

Mandrel

I don't think I paid that much, I found a whole set that went from 1/2" to something over 4" a long time ago. Prior to that I held the head end of the cylinder in the headstock chuck and supported the base end with a rotating 3MT chuck in the tail stock. Here's a link to that.

Chuck

I didn't like expanding the jaws inside the base spigot, I was worried about distorting or cracking it. That's why I switched to using the mandrel.

Fluff, only time I see them broke and only place I have seen them broke.  The index notches for injectors and I blame this on poor maintenance practices.

My biggest problems with crate motors.  In the end.  You have a crate motor.  Now offering unassimilable and a couple things off the list like pistons and cams.  Now we are building performance.

Quote from: SP33DY on Yesterday at 08:00:26 AMI tried a few things that didn't work!

 Now when I get an Evo cylinder with baked on gaskets, I use a mandrel to hold the cylinder in the lathe and carefully skim it off.

Got a picture of that mandrel?

Thanks. Bike has 22k on it.

 


thanks for the pics

Any jetting changes to your CV40?

The problem was a pigtailed DFO/TFI failing.

Looks like someone did some clearencing to two of the inner primary cover screw mounting bosses on the bottom of the inner primary. Were the cover mounting screws shortened as well or were none used in those two places?