Ariel Owners MotorCycle Club

??????????????????????????????? Can't see how either would work unless done really carefully and cleverly. But why go to all the trouble? I think I remember my rocker spindles being 'blind' on the spark-plug side, so oil wouldn;t be able to get through that way. Unless I've misunderstood Paul's desc...

Some of the guys with BSA A10 Rocket/Super Rocket engines have got over the problem of barrel weakness after sleeving by brazing ithe top and bottom of the sleeves into the barrels, which allows the sleeve to take some of the stress and apparently isn't too difficult to do.

You can put standard 1" (shaft diameter) shims behind the thicker spacers and the flywheels - Drags sell 'em.

(I'd not be surprised at the clearance changing if mains/big end have been replaced)

My not massively accurate calipers say 1.940. A 350 rod can be machined out to take it (if I get your drift!) I know of one that's been done like this, although not for racing. I heard of this years ago as the mod that all the 'racers' used but I expect someone out there will know a bit more about t...

I think the 51-53 models used a copper head gasket and if I remember rightly the VH spigots are the same size and it fits the earlier ones as well.

(I seem to have acquired one of those copper ring gaskets somewhere along the way, Mr Collings might just have pointed me to its origins!)

This will be done and extra web will be welded in to suport it. I had some extra welding done in the timing chest, the welders had a lot of difficulty as some of the castings were seemingly quite porous and had absorbed an amount of oil. Two of my three timing-side crankcase halves ended up as scra...

I've had several 350 barrels and a 500 barrel (all iron-head type) sleeved and had no problems. It might depend on the OD of the sleeves - I doubt if any of the ones used for me were 'factory spec', probably the closest of what was available at the time. I don't find they wear particularly badly, I ...

john.nash wrote:.
The 500's are harsher, vibrate more...

Nothing like as vibratey as a 650 though

A10 engine won't fit directly - crankcases are different, as are all the external parts in one way or another. A10 top end will fit on FH bottom end but later 'big fin' A10 barrels/heads have a diferent exhaust port angle (earliy A10 barrels/heads are similer to FH but I'm not sure about the exhaust...

No 3 looks a ringer for what I've got from a 55 Huntmaster. (Can't measure its length because it's currently on my VH - so used to try to lock up the mainshaft in the main bearings properly and stop that infernal bearing creep that has worn every single-cylinder mainshaft that I've ever seen that ha...