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May 12, 2024 | 07:11 PM

#11

Rounders

Seasoned HDF Member

Joined: Mar 2021

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From: backwoods

If sending to dark horse,is there any savings with the donor engine? Other than can do it while bike is being used

May 16, 2024 | 08:46 PM

#12

Max Headflow

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Joined: Dec 2005

Posts: 19,960

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From: poway

Quote:

Originally Posted by Streetglide938

So I’d like to run a 124”, and what I’ve read a lot of guys are using the stock 110” crank and bearing. I personally don’t think that is a good idea with as much work that is going on in top end. So looking to see what crank and bearings guys are using on the high compression builds and what other internals guys are using. Also I don’t know what kind of machine work will be needed in the bottom end as well. I’m not afraid to spend money on this project as I’m not in a hurry for it. I have a motor in the bike now that I’m still running but wanting to build a good big bore motor for it.

In order to get 124 with a stock cranks you'd have to bore to 4.25. I wouldn't do it and I own a 131..