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Old 08-21-2012, 10:37 PM
Doug Richardson Doug Richardson is offline
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Default 1984 FXSB Build

I just purchased a 1984 FXSB Low Rider. The bike is a basket case. I am doing a complete frame up build. Not looking to bring the bike back to stock. Here is what I have done so far..

S & S 103 cu shovelhead crate motor (keeping original)
Baker 6 into 4 tranny
New sheet metal and paint

Now, here is the question..

I'm looking at a Primo open belt drive, brute IV, it lists fitment as 1970 thru 1978 shovelhead. what changed?

Baker says I have the same output shaft on tranny thru 84, and same case

S&S says same crank on motor from 70 thru 84

I don't know why this won't work with the exception of electric start. However, Primo says I will need to update to Evo style starter anyway, so this factor is eliminated. Am I missing something.

This is my first build, don't want to make a bunch of costly mistakes

Thanks for any help you can offer
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Old 08-22-2012, 09:51 PM
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TwiZted Biker TwiZted Biker is offline
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Your in complete custom fit as you can find what works territory now forget anything that has to with model year as it doesn't count anymore . Off hand I'd say it will fit but the question is still the starter issue , late model starters have different gear drive & tooth count than shovels did and the way they engage the clutch shell is spaced different too . Better do some serious digging before you spend money on big ticket items for compatibility issues .
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Last edited by TwiZted Biker; 08-23-2012 at 08:41 AM..
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Old 08-22-2012, 11:00 PM
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Tom84FXST Tom84FXST is online now
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The only justification for the Baker 6 into 4, is you can reuse stock primary,clutch,starter etc...as soon as you start changing these items...doesn't stack up. For less than the price of the Baker, you can get a Rivera-Primo shovelhead conversion kit, which has everything you want...ready to bolt on and go.

http://www.jpcycles.com/product/603-150
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Old 08-22-2012, 11:08 PM
Doug Richardson Doug Richardson is offline
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I am familiar with the primo conversion kit. I decided against it because I did not want to loose the kicker...I know it is just there for looks with the 103, but I want it there none the less. With primo primary drive, and 1990 era starter, I think I have pieced all of this together, assuming I have room under the oil tank for the new starter, but primo conversion kit uses the same late model starter, and I believe their 6 speed is taller than the original 4 speed, which is the same height as the baker. I will know more when tranny comes on Friday. I will let everyone know how this turns out. All I can say is it's goin to be fun, well maybe?!?!?!
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Old 08-23-2012, 05:27 PM
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Tom84FXST Tom84FXST is online now
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I have both the baker and primo trans...the baker shifts sweet but it still has the 4 speed clutch release and the tapered shaft. The spined main shaft and ball and ramp clutch release is trouble free and more suited to the 103...not to mention a LOT cheaper even after adding a $400 kicker kit....Good Luck
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Old 08-23-2012, 05:27 PM
 
 
 
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