S&S 640 Compression?

[Hillside Motorcycle]

I wont speculate what power numbers you will make because dynos and how the bike is dynoed vary. However, if you're not  240lb like myself, you should be able to get into the 10s with practice with this recipe.

We've set up a client years ago with even 113" engine that went into the 10's with ease.
He broke into the 9's after some seat time.
124" Softail went 10.5's first time out about 1 1/2 ago.
10's should be in easy reach.

[Badger711]

Thanks for the info. Tempting to ditch the lockup as I've heard the added pressure on the mainshaft makes trans bearings unhappy.

[Badger711]

I wont speculate what power numbers you will make because dynos and how the bike is dynoed vary. However, if you're not  240lb like myself, you should be able to get into the 10s with practice with this recipe.

We've set up a client years ago with even 113" engine that went into the 10's with ease.
He broke into the 9's after some seat time.
124" Softail went 10.5's first time out about 1 1/2 ago.
10's should be in easy reach.

That's good news.