AMA is the 1957 350 prefix but was also used for most of the HT3. As far as I understand it crankcases were supplied blank, the idea being that the old number would be transferred and the old cases destroyed, given the number of machines with blank cases this didn't always happen. Complete engines a...

Given the recent interest in HT3 this one popped up https://www.carandclassic.com/car/C1695764?utm_campaign=saved-search&utm_source=email-alert&utm_medium=email&utm_campaign=website&utm_medium=email&utm_source=sendgrid The standard road frame number is already on the register lis...

The HT head races are BSA parts that are almost but not quite the same size as the Ariel ones. The yokes are BSA, check out the parts book, it is the bible bottom yoke 4800-55 (42-5012), top yoke H3-55 (42-5011), std Ariel bottom legs and hubs listed in 1955 and 1956

The HTs do have BSA yokes but the parts book lists a standard FW hub in 1956 and 57 for the HT. As some BSA use the FW hub I am pretty sure the stanchion spacing is the same so the hub shouldn't need to be narrowed. I have a BSA 8" hub in my regular bike and the width is OK. My 1958 HT3 has a F...

I noticed that as well and have told him that he is incorrect. In the caption to some of the photos he mentions the BSA brake but the wheels are definitely the Ariel 1/2 width with fulcrum adjusters, BSA were not that sophisticated. He mentions them in a photo part way down "Ariel the other GOV...

I have already spoken to Alan but I thought others might be interested to know what we know about numbers of HT3. 32 were built in 1957, there are 13 known survivors, 8 of which have the correct prefix 44 built in 1958, 21 known survivors, 17 have the correct prefix. These numbers put them in the to...

There should not be a gap there

Or a bad battery! Does it loose charge when not connected to the bike?

The modern Lucas stuff is mainly made in Taiwan, not India but again quality control is good, just as it was when Lucas was alive.

Yup 29-7390 see part number in parts book, used C10L and some Bantams