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Can any of our knowledgeable members show some light on the prefixes on engine numbers for the late 50s - early 60s series of 175cc singles. My 1962 Tresette has the prefix "F" and I have seen others with "TS" (Tresette Sport?) and also "A". My question really is are th...

Jonathan, Not much help to you I know, but I have what appears to be an identical noise on my 1962 Tresette, bought last year. I too stripped down all the primary drive and found nothing obvious, though I also had a badly dragging clutch caused by an additional plate (!!) and odd length clutch sprin...

Doug, Just put the top end back together. The "odd" washer under one of the sleeved head nuts ,was down to one of the holes in the head being deeper than the other three. The reason for the washers being under the rocker carrier, rather than under the nuts, was due to the carrier just foul...

Many thanks Doug. Just taken the head off this morning, the head nuts are indeed 9mm, so 25 ft/lbs it is. Two odd things I've found is that only one of the sleeved head nuts had a washer fitted inside the casting "tunnel", obviously not correct, and there are also washers fitted under the ...

I'm having to replace the head gasket on my 1962 Tresette, (slight oil leak under the exhaust port). Can anyone suggest the correct torque figure?
Many thanks, Keith Bellinger (3387)