I just picked up some new 103 twin cam heads and cylinders for a stupid low price so now I need to figure out the rest of it.

I'm looking at a Dark Horse crank and S&S timken cases for the bottom end. Does this sound like a good idea?

Could I title the bike using just the case numbers in Arizona? I'd like to modify a 80 FX frame to hold it. I have a 59 neck without numbers I could I could put on the 80 frame if I had to.

 

I can't help but I think you need to visit the AZ DMV and find out what the requirements are to register and pull a clear title for the bike. I know anything is possible given enough time and money but I suggest that you figure out exactly what is required to mate the later motor up with the early frame; time and cost might be a show stopper. Just sayin thoroughly research/investigate both before spending any money.

 

It’s gonna take a lot of parts to bring heads and cylinders up to operating condition. You’d be better off getting a take out mototvintwct.

JMHO. YOMV. .

 

Are you talking about bumping up your existing twin cam to 103? if so, what year and model do you have now? Did you get rid of your 22 Sportster?

 

What ever case you use will need a COG. Not a bill of sale from bubba's discount engine supplier.

 

The frame will have a title right? It will be titled as 80 fx. Find out how your state handles piecers. Only time I had numbers check was when moving, one state cared

Guys don't do this to save money. They want to

 

I'm keeping the 22 Sportster. I also have a 06 88inch Street Bob I bought new that I'm keeping for now. I'd like to build up a 103 in a old frame for my son. I couldn't pass up the deal I got on the 103 parts.

 

I don't have a title for the 80 FX frame but I could put a 59 neck and a drop seat on it as the pre 70 frames weren't numbered. Sent S&S an email about the cases but haven't heard back yet. Just starting to look into it.

 

I just had a good look at the cylinders and they are both around 0.0015 - 0.002 bigger at the bottom, a pretty gradual taper from 3.875 at the top. So I guess the factory does this on purpose?

 

Won`t a T/C in a Shovel frame require raising the top frame tube ?
Have to with an EVO