Over and over 1250 kit here, 1250 kit there...

But why 1250? Why is that the magic number? Does the 50cc difference from a 1200 make any difference?

Just curious as I am planning to do a sportster build in the near future.

 

Cus they don't make a 1251!

Sorry I'll move along!

Actually, looking into all this as well. I was pondering it during my rebuild. But think I'm gonna keep my ole 96 and 883.

 

it was more cost effective then purchasing a 1200 kit from Harley or buying a 1200 sportster. I had an 883 & knew when I bought it I'd be doing a 1250 conversion.

 

I am by no means an expert on this subject, but I believe the benefit of the 1250 kits come from the increased compression. I think 1250, just happens to be the biggest displacement you can go without a case overbore.

 

1250cc is as large as you can go without having to bore the lower cases (where the cylinders attach.)

You can simply swap the cylinders and pistons up to 1250cc.

You can bore a sportster to over 1400cc, but it takes a lot more work.

It's true that the 1250 kits from Hammer Performance and NHRS have higher compression than the 1200 kit from HD, but that has nothing to do with the displacement. It's just something HD decided not to do.

 

What's unmentioned. Is customer service after the sale of a 1250 kit from hammer.

Any question I have engine related can be answered with a email or a phone call.

Another thing not mentioned is the pure joy of twisting the throttle after conversion.

It's why these kits are so popular

 

Bottom line. Would a Hammer Sledge build hold it's ground to an R6 on the 1/4 mile stripe.

 

Search Madnss on here. You'll see the answer. He's an excellent rider and his bike has always been set up right to make fast passes, even before the stretched swinger. He's got probably hundreds of sport bike kills under his belt Good rider, solid combo up against a relative newb on a 600 rocket.. it's HD wins all day. Match rider skill however and it gets a little ugly for the V-Twin camp. Light weight, lots of power and aerodynamics are hard to beat.

 

Yeah, that Sporty is fast. The reason I ask is there's a guy that rides an R6 around here that always bragging that he can beat any Harley on the street here. He even says that he would put up his title to his bike to prove it. I heard he lost to another rocket and ran with his title afterwards, don't know if it's true though. No way I would put up my title against anything, you never know what someone else has under their ***.

 

I think the point is to upgrade to 1250 from an 883, I don't think many people upgrade to 1250 from a 1200.