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I noticed that you had kept the black panels on the side covers the way they were, with tapered panels on one pair and larger, non-tapered panels on the other pair. You will be able to tell the two bikes apart.

Making progress.

I stole this pic from Antietam Classic Cycle, my engine builder. I'm excited!

My friend sent me a link to the Guy Webster motorcycle collection. I believe he sold all his bikes but he had an early sport that he purchased new.

https://m.youtube.com/watch?v=poq2q1moMkU

Mepstein wrote:I stole this pic from Antietam Classic Cycle, my engine builder. I'm excited!

Never seen an engine look like that. Dobyou intend riding it?

MickeyMoto wrote:Never seen an engine look like that. Dobyou intend riding it?

Most likely vapour blasted (aka hydro-blasting...uses glass beads in a high-pressure water stream, sometime with other chemicals such as inhibitors). Quite a common process these days for cleaning all sorts of metallic parts. In this case it looks like the engine has been 'dummy' assembled for the purpose as there are many fasteners missing, not to mention the kick start shaft.

Lambs is exactly right. I had sent out the parts to be vapor blasted and my shop owner liked the result so much, he purchased a machine. The parts were so corroded from storage that I felt I needed to do some sort of clean up to them. If it wasn't vapor blasting, I would have soda blasted all the parts.
The bottom end is built and the top end is mocked up. The parts for this engine are from a couple different sources so the builder is correct in making sure everything works together.
I do intend on riding it but making it look nice is also important to me. It certainly doesn't cost more to assemble a clean engine vs a dirty one.

Yes, that was empty cases loosely assembled to ease storage until all parts were gathered and work began. Here's the engine at present. Still have the clutch to assemble, valve timing to set, alternator stator & flywheel, etc. to install.

Hi my mk1 sport is A1 05** does that make it an early number?

Does your bike have polished alloy fork clamps or black-painted ones? The first drum-brake Sports had the polished alloy.

Hi yes polished clamps and all the right parts for a MK 1 Sport as far as I can tell . its a 1975 ,just starting 2nd year of Tax exemption.

Enter 'frame numbers' into the 'search' facility in the top right corner to get more info on numbers.

Seems strange that a '75 would have polished clamps. I thought by late '74, they had moved to black clamps.
Does it have a two piece assembly to hold the gauges or is it one piece of steel with small holes to hold in the rubber nubs. Even the seat pans are different on the early '74. The painted one is early, same size but different hole in pan.

Actually they can have black or polished ones. There is a roadtest from Motociclismo back in 1975 that has both versions in them, the pdf should be in the online archive but I can't find it anywhere at the moment.

mine had wrong seat when I bought it so cant check seat pan ,got new "Bum stop" seat from NLM , very good quality . According to V5 it was first registered on 01/11/1975,it was imported in 2012. it would be wrong to think it has all original parts after 42 years ,all I know is it looks great and I enjoy looking at it and most importantly riding it ! thanks for all your replies.