Interesting sounding build. Modern cylinders and heads don't look the same since the fashion for machining the edges of the fins came in! Even if you paint them they won't look quite right IMHO, best leave as is.....

 

Nice build plan.
Larry never dissapoints!!

 

Yes, you're basically correct. The spec sheet that came with my kit calculates top ring gap as bore x .0045 (4.125 x .0045= .01856) and add .004-.008 to top gap to get 2nd ring gap. I set the top ring at .019 and the 2nd ring at .024

 

Interesting because both instructions are supplied by S&S and don't "Jive"







http://assetcloud02.roccommerce.net/...s_20131230.pdf

 

Isn't the Pinionshaft TIR at the cam support plate the run out/endplay (.0010")?


Are you planning to go with chain or gear driving cams? If that .001" is correct, you should be perfect for gear driving, I would think.

 

It is weird that they have 2 different instructions, but the numbers I came up with fall within the specs you posted...so I should be good. In any case I feel comfortable following the specs that came with my particular kit.

 

Too bad about the initial build.. That should have made 100/100 easy.. It's good that you found someone to tune the bike for this build.. You got a heck of a lot more money into it..

I would have run the SnS 625 and let the CR end up at 10.8/11.0.. I've got an older SnS 116 in a carbed dyna at 11.3 with the 625 and it pretty much makes power from 2000 and the way to 6500..

You can't adjust crank end-play when the lower end is assembled.. I'm sure Darkhorse set it for you. One thing you need to do for sure is get the primary sprocket spacing correct. Make sure you have clearance between the stator windings and the rotor. Seen a few guys get that wrong.. The spacer will be a different length then what you had.. I would imagine Darkhorse should be able to get you close with the spacer but always check alignment.

While I've not had any issues fling rings by hand, I bought one of the Summit racing ring filers that has the crank on it.. Removed the hand crank and used and electric drill.

https://www.summitracing.com/parts/sme-906000

Works pretty good but the finish on the end of the ring is a little rough.. Broke the edges with a fine diamond hone.

 

I hear ya...

The specs I posted are shown for that kit also

That being said, I'm going to send them an email...my OCD won't allow the discrepancy to go unanswered.

 

That's probably what I was thinking of...just remembered reading something months ago when I was researching the build.

 

Glad you're moving on this. Looks like you have a solid build.