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Old 11-28-2012, 03:03 PM   #16
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What about a Destroyer crank. I seen a post somewere were someone posted the difference from a stock 1250 crank to a Destroyer crank. It was slightly longer. Obviously I would have to take the engine apart but to have a stroker engine would be nice
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Old 11-28-2012, 03:22 PM   #17
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Destroyer cranks are pretty hard to get a hold of the last time I looked around. Would probably be easy to pick on up from Falicon.
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Old 11-28-2012, 03:29 PM   #18
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Quote:
Originally Posted by Demthios View Post
Destroyer cranks are pretty hard to get a hold of the last time I looked around. Would probably be easy to pick on up from Falicon.
I might have a source for one, Question is would it fit? Bearing size,case size etc. What's different from the Destroyer cranks to the factory
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Old 11-28-2012, 05:51 PM   #19
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Those oversized TBs from Vreelands are for track only anf for their equally obscene BB motors (LOL) not for the street!
Yes. When I asked about installing 58's, Ray told me that 53's flow plenty of air, on both the 1130-1250cc motors. 58's are for all out drag racing, sure you could use them on our "street driven bikes". However the Co$t vs. HP gains don't add up. That's why I kept my 53's.
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Old 11-28-2012, 07:35 PM   #20
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I have a guy that does head work. BUT if I can get away with a stroker engine then all the better. I found a old post on CC/Stroke differences

Stock stroke = 72mm
Destroyer stroke = 75mm


1250 with Destroyer Crank = 1298.9cc

I MIGHT be lucky that a friend MIGHT have a Destroyer crank on hand. Only thing I wonder is will it work with factory parts and will it raise the compression too high were it would need race fuel? I believe the compression on a stock 1250 is 12:0:1
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Old 11-28-2012, 08:34 PM   #21
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Originally Posted by vrunner79 View Post
I have a guy that does head work. BUT if I can get away with a stroker engine then all the better. I found a old post on CC/Stroke differences

Stock stroke = 72mm
Destroyer stroke = 75mm


1250 with Destroyer Crank = 1298.9cc

I MIGHT be lucky that a friend MIGHT have a Destroyer crank on hand. Only thing I wonder is will it work with factory parts and will it raise the compression too high were it would need race fuel? I believe the compression on a stock 1250 is 12:0:1
You would also need to install longer rods. Stock rod length is 5.708inches. Destroyer rods are 5.588 inches. A set of Dyer rods runs about 500 dollars (plus bearings).
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Old 11-28-2012, 08:42 PM   #22
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Originally Posted by WhosUrBuddiee View Post
You would also need to install longer rods. Stock rod length is 5.708inches. Destroyer rods are 5.588 inches. A set of Dyer rods runs about 500 dollars (plus bearings).
1130,1250 and destroyers use the same connection rod.
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Old 11-28-2012, 08:59 PM   #23
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VrodG is correct, all three use the same rods.
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Old 11-28-2012, 09:17 PM   #24
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SO.. a Destroyer crank should be a direct drop in? Unless the Journal size is different.
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Old 11-28-2012, 09:23 PM   #25
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1130,1250 and destroyers use the same connection rod.
Damn, I must have misunderstood K1 when I was talking to them about it.

Edit: Checked my email, was refrencing the Falicon crank, not the destroyer crank sorry.
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Old 11-28-2012, 09:24 PM   #26
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Look around others have used the destroyer crank in there stroker projects. Fits the stock cases just fine, more goes in the just that, do some searching.
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Old 11-28-2012, 09:35 PM   #27
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Wouldnt a 1/4 weld up crank be better than the destroyer crank? Easier to get, about the same money, stronger.
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Old 11-28-2012, 10:26 PM   #28
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I've searched for Stroker engine posts. Most I see are people doing it to the 1130cc engines or just full on Big Bore packages. I have someone very close to me (family) that was involved in the devlopment of the Destroyer before he retired from HD. i'm trying to do my own research before he will work on the project
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Old 11-29-2012, 02:17 AM   #29
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Quote:
Stock stroke = 72mm
Destroyer stroke = 75mm

1250 with Destroyer Crank = 1298.9cc
Those 48cc would be like a $5k job and give you like 7 hp? If you're doimg it gonall the way with the BB IMHO
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Old 11-29-2012, 06:53 AM   #30
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I agree with Fabio, really not worth spending the money and splitting the case just to swap cranks. Go bb and stroke at the same time... save you alot of $$ in the long run.
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