1) That's normal - should have auto advance-retard fitted
2) No idea, unless it's happening under load in which case it's the engine shock-absorber cam slipping (unfortunately, my particular area of hard-won expertise for these)
3) Half-width is standard spec for '55 and often considered better than the later full-width variety, they are often not properly adjusted (same hub/brake as singles and 500 twin, see a couple of other recent posts).
4) Should have a magneto 'kill' button.
(Engine-wise, it's the same as a BSA A10)
john.whiting wrote:The alloy full width hubs are notorious for brake locking up suddenly when slightly rusted from non use ,and pitching the rider ......they are a BSA design ,and BSA ditched them after one season and fitted the later FWH cast iron version ,familiar to all A10 owners.
nevhunter wrote:The primary chain may need a little tightening. Check it when fully hot. The iron Qualcast brake works OK till you get it real hot so long as it's running true and adjusted properly Have the wheel off the ground to check it properly . Sometimes a bit of lining material has to be removed from the trailing shoe. Nev
Mick D wrote:Hi
To amplify the advice posted above:
You should have a working choke system - originally the choke lever was integral to the front brake lever.
Depending on the seller, you can easily check the tension of the primary chain by removing the inspection cover - also worth removing the clutch dome to feel if there's any play in the clutch.
The primary chain case and gearbox main shaft assemblies are modified if the Fully Enclosed Rear Chain guard is fitted - incorrect components can result in the primary chain rubbing on the chain case.
I've no experience of the half width hub brakes but the ones on my FWH 58 FH are pretty poor at the moment but improving slowly with use.
The kill switch can be a little inconspicuous:
I finished restoring mine a few months ago and am loving the ride it gives.
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