Mystery Motorcycle - what is it?

[themike]

That IS a BIG TWIN Flathead top end = 74 c.i./80 c.i., on a Sportster bottom

[Rubone]

That IS a BIG TWIN Flathead top end = 74 c.i./80 c.i., on a Sportster bottom

The green bike yes, but not the original one he asked about, the KR hybrid.

[EKHKHK56]

I have supplied heads and jugs over time to people with custom 45” W projects. 45” & 55”. Used K cams. The photo posted shows my friend Jonas Wickman’s Capitol “K” with new BigTwin mill built in conjunction with Anders and Co at FlatHead Power Sweden. Based on modern XL cases, the top end is 80” UL but all new and all alloy. Erik