Thankyou for your help guys.

A couple of weeks ago I tried using a Perry regulating pump working from crankcase pulses with the standard glow carbs. I spent an afternoon trying to get pump and carbs to work together, but in the end gave up as I began to lose the settings, couldn't remember what needle settings I'd started with, and couldn't achieve reliability. I wondered about getting a Cline or Iron Bay regulator, but then the Zamas came up on Ebay, and as the pair were cheaper than one Cline or IB, I decided to get the Zamas and give them a go.

With the limiter pulled off and choke shaft shortened, I should be able to fit one per cylinder. Looking at the engine this morning, I spotted what might be an easy way of fitting a single carb. Laser vees aren't just as straightforward as the usual 4-stroke singles or flat twins for fitting gas carbs. It doesn't matter whether I fit one or two carbs, I'll still have to replace the existing radial mount arrangement. A "U" style as used on various flat twins made from alloy plate will suffice. I'll keep you all posted with progress, but please don't hold your breaths as I'm dealing with some other projects right now.

The pulse hole is quite some distance from the intake throat. I'm planning to buy some PTFE sheet to make a heat spacer, so presumably, I can cut a slot in that to link the pulse hole with the intake?

Thanks again

Gordon