As I understand it, the Morgo oil pump for the Ariel singles was produced for the Trials boys, who tend to operate at low revs. That makes some sort of sense to me. Of course, people then put the Morgo pumps in standard road going bikes which operate at much higher revs and found the consequences of...

Mid - January and John's funeral was today. The Gloucester Branch managed 5 Ariels to escort him on his last journey, a1926, 1928, 1929, 1937 and a W/NG fitted with 500cc engine and tele forks. 3 other AOMCC members were present, although not on bikes. We left the ceremony to the sound of a song, re...

Wow! How fantastic! I doubt we could achieve anything like this in the UK, even if we tried to in Birmingham.

2 questions:
Has the nut on the kickstart end of the mainshaft got a large internal chamfer on the side which should abut the kickstart ratchet?
Is the mainshaft bent?

I have a 21 T KH engine sprocket which I can measure for you or send it down to you for trial purposes although I want it back. Both my KH and KHA use 23 T Square Four sprockets with a minor mod which I can never remember but can work it out when fitting the sprocket. The sleeves are many and variou...

I have a 21 T KH engine sprocket which I can measure for you or send it down to you for trial purposes although I want it back. Both my KH and KHA use 23 T Square Four sprockets with a minor mod which I can never remember but can work it out when fitting the sprocket. The sleeves are many and variou...

I wonder what you have as a gasket between the kickstart cover and the main gearbox shell. There were some pretty thick gaskets for that joint about a few years ago but it should be a thin paper one.

The BYP series was issued from April 1961 so it ties up with the Norton and is nothing like a 1956 bike.

Mick. My gearbox started being noisy one cold winter's day. Addition of the egg cup full of gear oil solved the problem for the rest of the time I used that gearbox. Hence my suggestion but it may well be worthless when tried in this case. Simes. If you talk to AOMCC gearbox spares I suspect you wil...

For the record, I have found:
T on HA prefix cases (1935 250)
T on AC prefix cases (1937 250)
H on BC prefix cases (1937 350

(all marks between the pushrod holes)

but nothing on my 2 sets of AB prefix cases (1936 250) and nothing on my CB prefix cases (1936 500).