classic motorcycle forum

A pre 36 maggdyno will have a ring cam ,and quite often these rings are very worn,altering the timing adversely..........you cant regrind the ring ,as its case hardened ,and once the hardening is worn thru ,very soft steel.

A late A10 should be alternator with the 4 spring Triumph cluctch....not the six spring pressed tin BSA clutch...........anyhhoo,people replace the clutch with a Suzuki one ,cant recall which ,but the swap is well documented.........Incidentally the dragging clutch will smash your gearbox gears apart.,and sharp gear chips will score the shafts.............To cure this problem ,I fitted an army beezer clutch ,this freed easily,but tended to slip under power.,just had to ride the bike sedately .............Anyhoo,when I sold the bike ,it lasted only one day , and was on the news that night..........he tried to pass a bus on the inside as it turned left .

Fail to start can also be flooding of a hot motor ...........I diagnose start problems with a can of starting spray ......this stuff will fire with flooding or with fuel starvation .......but it wont fire with no spark.

The exhaust seat has been well recut (several times) and pocketed ......not that it matters for road use ..........however it means that a new seating ring cant be fitted without major expense..........If your timing is extreme ,you need to be sure the valves wont collide ............Must say it seems strange to me that Burlen and others sell replica Amal carbs for astronomical sums ,when you can buy new carbs for 15 quid on ebay or temu.

One engine Ive worked on ,the roller tappets had only half an axle ,the other 1/2 of the space in the roller was taken up by a spring looked like a paperclip .....the lifter body had half a  hole broached into it,so there was no chance the axle could turn in the lifter ........very reliable system for an engine that would do a million miles.

Thats corrosion pitting..........I wouldnt worry about it .............I can say one thing for sure .....do not replace the rollers with ball bearings ...... disaster when the bearings break up and wreck the cams...........My motor has new rollers and cam ,as the 500 motors use the same parts as the rotary cultivator engines ,and I was lucky enough to find a stash of NOS engine parts

The little Sturmey Archer box is still for sale on marketplace ...down to $400 now.

 Im about to bore out a 276 carb to 1& 1/16  for my Ariel .........question is ,can I simply bore out the jet block/slide guide assy as one piece ? ....or do I have to unsolder the lower part ,so that the short tube on the jetblock is unchanged ?...........Unsoldering/resoldering could be tricky so as not to block  or obstruct any of the passages or jets...............I see lots of horribly bodged Amals about,seemingly enlarged with  coarse sandpaper wrapped around a stick,but they are never attached to engines ..............which Id assume is because they dont work anymore.