When I was building to go fast with twin cam. I mentioned to him I was worried crank pin would slip. he said they are fitted at tighter tolerance 's than the XR 750 flat track racers. but mine slipped.

S&S never slip as fitted like your saying, but Harley crank pins do, seen a few but not all riders put them to the limit.

this motor won't see the stress my twin cam has seen as not building it for high rev's or high HP. I'm confident and will take to the track & race.

thanks for your thoughts.

I think if I was planing on higher revs crank could break. won't stop me riding it everywhere & enjoying it.

my one had 70,000k up when it slipped and that many passes down quarter. I used to go to the track almost every week if not raining.

surprising it still ran 11's with the crank pin slipped, but trap speed went from 120's mph to 112mph.

pulled heads & could not believe how hard it was to turn motor over. surprised me it even done 112mph standing quarter.

welded new crank pin in and that was 10 years back still going.

I loved that bike! 

the sporty lighter, but can feel the vibes! but lot smoother than the old Shovel I had. just have to see how it goes down quarter.

cheers

if you want to go EFI on yours could get an Aussie Autronic ecu they are good but I don't know how much, just friend uses them a lot with race boats & cars. cheaper than motec.

I'm using the carb as had the carb I'm using on a twin cam 88" & jetting & tune was perfect on that & got good economy.

She is a runner!!

Started up easy, three year old battery was standing for 6 months. it was on bike when I got it and the lady owner said it was two year old, I have not see this brand before don't know what type. was bought at Battery world in Queensland. motor 1450cc 10.5 comp, so good battery good tune out the box.

it's turned out good I'm happy.

Krash, good to see it come together.

I would love to hear the old girl fire up !

Must be the old style ignition that starts up easy, my twin cam used the crank sensor ignition and was never as quick to start as the old carb Buell or the Sporty. I have no experience with the late XR or sporty's that use same ignition as the twin cam did.

but have to also remember this is same style ignition I used ( almost ) with a kick start only shovel, they had to fire up quick & easy or you were stuck.

Talking about my old shovel, my friend who now owns it, got a Rivera 6 speed with the 3" open belt primary but with a late style geared up starter & that motor also is one of the quickest easiest to start Harley's I've seen, as it's still basically same set up as I used to kick start, so it's just a touch of the button and it bursts into life quick . amazing to watch as he turns on petcock for fuel & the starter button is hidden and you don't see him use it, like the handle bar button, and the old shovel bursts into life. but I know EFI starts up real quick, I was talking about carb crank sensor ignition. the shovel starts like an EFI

Krash, when you get time, the start up Vid would be good to see.

I have a strong 120" Twin Cam that I built running a 48mm Mikuni.

I'm using an aftermarket Daytona Twin Tec ignition, and it can struggle to fire.

It doesn't have the Cam sensor fitted as it had originally, just the crank sensor, so it uses the MAP sensor to decide when the correct cylinder

is on TDC to fire. The Auto comp' releases  bleed off too much compression, and it has trouble sorting itself out.

If I don't use the comp' release's it will fire straight away, but it is too much stress for the starting system !

My Twin Cam was the same , no cam sensor just the crank position sensor & I had the Crane Hi-4 ignition I think they are similar but Daytona Twin Tech has a few more adjustments. I loved that bike. it just had the old 2001 casting heads, but welded up in ports and chamber was a custom machine & I had one off custom ordered JE pistons. I had the same carb on it as this Sporty has on it now Wood Rebel 43.5 CV, we put it on a Super Flow flow bench and flow tested the cv carb & an S&S G we had & we were surprised as both flowed same air. I think it might flow more than this sporty need's but just have to see. I also put an S&S Super D with TJ on the Twin Cam & no excellerator pump, it needed 3,500 before you could give it a full bore, but it flew. then I picked up a CV51 & SE tunners Kit I ran an S&S G manifold with a custom machined 1 " spacer that could mount the D or the CV51 the D made more HP but I was quicker at the Drag strip with the CV51, it was a 95 inch 11.5 comp, best time was 11.2 I was consistent as raced it a lot. best speed was 121 mph but speed would be up some days down others depended on quality of the air on the day, as I just left the tune as it was & road it on street too. had Sonic Pipes.

Cow's son owns it now & has late 2007 head castings S&S easy start cams. I always liked and used the Andrews 55G.

but can't upload seem's to take forever, probably too big.

Krash, I've uploaded your videos to Youtube, but apparently youtube is all Fu*%ed up today, will post when it lets me.

I'll put the links here for now

This should also work if you click on the link:

Sorry about the Number plate, If your worried, I can take the video down.