Parts arrived today, not bad, only a weeks turn round time, so it’s on with the job!.
The Velo special spanner made snugging up the barrel base nuts a doddle!, wish I’d had it when taking them off!, not only that but it doubles for removing the magneto mounting nuts on the big Velo!.
Once I had both barrels snugged down I had to reset the tappet clearances. This meant taking off the inspection covers to get at them. Valve clearances on these engines is 4thou on the inlet and 6thou exhaust at TDC. As one turn of the adjuster is 38thou you can set the inlet to about 2/3 of a flat open on the adjuster , nip it up, check it with a feeler gauge and if OK then lock it down. For the exhaust you set 1 flat open and then check, spanner access to the tappet lock nuts was poor so I dug out the obstruction spanners used for doing the Panther’s tappets. Have to try and get some better quality ones though, the Panther ones are simply cut from ¼ inch sheet and are a bit crude.
Next was refit the exhausts, bit fiddly but no problems.
I refitted the cylinder head studs, these had been removed to send the barrels away to have the water stubs replaced, and then put the heads back on, but while I had them off I took the opportunity to check the ignition timing — points opening at TDC on full retard –, while there is a marking on the flywheel for TDC, because the flywheel is not keyed onto the crankshaft the accuracy of this depends on the workmanship of the person who last refitted the flywheel. Since the ignition is really a flywheel magneto this setting is important, the fact that Veloce did not key the shaft suggests they did not fully trust the accuracy of manufacture of Miller, who supplied the system, as neither the flywheel or the ignition advance unit are keyed.
Onto the home straight now! Just refit the inlet manifold and carburetter put on the water hoses and all that’s left to do is refill the radiator. It’s now into October so that’ll have to wait until I can get some antifreeze.