Thanks for asking Eddie.
Yes time flies
Well I'm been busy investigating what parts I need order and also what remaining work has to be done on the crankcase.
I examined the original Vincent flywheel/crank assembly more in detail a few weeks ago and it was clear that it was not in the condition I assumed (of course). The inner bearings ET92 are not a tight enough fit to the main shafts anymore and these bearings have worn on the side of the flywheels. So I would need to replace the main shafts and fix the flywheels so that means much more work of course that I cannot fix myself (I have no machinery). And having it made for me would take too long time as I really want to ride the bike the upcoming Swedish summer. Preferably to the Rally June 17th !
So I contacted Terry Prince and luckily he had all the parts available to assemble a new 90mm stroke crank.
Terry is off soon for an eye operation but the op was delayed a couple of weeks so he managed to assemble the crank for me before going to hospital. It will be air freighted from Australia tomorrow! Together with two special tapered roller bearings I need to fit instead of the standard E91 and ET92 as the primary sprocket has chewed a bit on the case so there is not much material left for the outer circlip to rest on. Terry and I agreed this is a good solution. The 100mm bob weight crank I bought from him for the Holder crankcase is fitted with 30mm main shaft and to eliminate boring the case to fit 72mm bearings he recommended fitting tapered roller bearings. By fitting these only the inner circlip is needed. So I'm doing the same on the Shadow engine instead of trying to fix the case around the outer circlip as this probably would mean a lot more work (and time). A plus is that more space is provided for an oil seal carrier. However I need to have two spacers made to sit between the taper bearings.
Std setup (ET91 in the picture should be E91):
My new setup using ET-15101/15250X from NTN:
One crankcase half and some of the covers are back at the welder to fix small dents, more cosmetic fixes than strength related. Hope to fetch the parts tomorrow.
In parallel I have been trying figure out how to remove the old stove enamel paint. Been checking out different types of blasting processes, chemicals etc. Talked yesterday with a company manufacturing stove enamel and their technical guy strongly recommended not to use strong acids or alkalics. He said probably the paint is still there but the alu is not! He suggested MEK or acetone but also asked the obvious, why do I need to remove all of it.
I visited a sand blasting company but realized this is too tough on the metal so next week I will bring the parts to a company doing ice blasting and soda blasting. Already discussed with the owner and he said they can blast for me within a few days.
Haven't decided yet if I will paint the engine myself or have it powder coated or spray coated by a pro. Still to be investigated the coming days.
Will order the remaining parts this evening from different companies. Hope to have all of the parts within a couple of weeks.
So I am fully occupied and still haven't given up the attempt to ride the bike June 17th. But at least I will ride it this summer.
Cheers / Patrik