I am moving up to a 124 CI and do not want to bore the stock cases, Therefore, I am in the market for quality aftermarket case.
4.375 crank, 4.625x4.250 will be the basic set up.

Any recommendations? PM me if necessary.

BD

 

R&R or maybe Jims

 

S&S all the way...I'm biased toward S&S because I've never broken an S&S part!!!

 

Is it me? or are your numbers off?? I have a 124 & i'm at 4.125(B) * 4.625(S).If you go with a 4.375 stroke you need a 4.2550 bore right??Why not bore the stock cases & save money?? If you go after market cases then you should go bigger than a 124ci.I would be looking at a 131 minium if i change cases.Just my I would watch how big you go with bore,because of the sealing surface.Not much meat there to seal cases.Call Ron Dickey at Axtell ,or Dan Baisley, & see what they would recommend.I don't think Axtell would recommend going that big on the bore,but I could be wrong!!!

 

I will be doing the 4.2550 bore. As to why i am not interested in boring my stock cases, I've heard of too many horror stories about bored stock cases seeping.

I do not want to take that chance. Furthermore, if i get aftermarket cases now, should want to go bigger later on, i have room to build. I do believe however the 124 will be enough.

Have you had any problems?

Phil

 

4K on my 124 so far. No problems at all, unless you consider tire spin a problem.

 

I would use the Jims or R&R or S&S I also I have sold 124 kits cylinders and Wisceo pistons, to other shops with theese combo no problems...... I have had good luck with the Jims Cases for larger bore motors. with up to 135 inch motors...... 135 is the biggest I have gone so far on the Jims Cases and no probs. here......... Now I would not do this size with a blower...... you will have head gaskets problems..... even if you try to
o-ring them not a enffff serfice area... you are pushing it.....

 

Thanks guys,

Are S&S and R&R the only other case makers out there?

 

If your going that big of a bore with stock cases then yeah you could have a problem,if its not done right.I have not had any problems,but mines is still fairly new too.The bigger the bore the more i would worry about seeping.Delcron also makes cases!! I'm just curious why you keeping the 4.375 stroke & going with such a big bore?? With a bigger stroke comes tq!!! Whose going to do the build ,or are you doing it?? How much Comp you going to run?? Cam?? When it's done you will be smiling!! My bagger is nothing short of awesome.It gets up & goes for a heavy bike!! The sound is awesome too.I'm at about 11.2 comp & it hits hard!!!

 

Quote:

Originally Posted by rob71458

4K on my 124 so far. No problems at all, unless you consider tire spin a problem.

rob,
as Dennis would say...

If you're spinnin', I'm winnin'!