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royaloilfield
royaloilfield
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My 1959 5Ta has a belt drive fitted in the primary transmission. According to the PO it was an Alistair Lawrie (of twin Triumph engined sprint fame) kit. The clutch is from a B40 with the drum machined to suit

I noticed a juddering when pulling away in 1st gear so pulled the clutch apart today to fit new cush drive rubbers. I also noticed the belt is slightly damaged so I will need to replace this.
I can barely make out some writing on the belt but have convinced myself that it says

991 Synchroflex AT10 730

I have looked online and have seen some of these belts listed as timing belts. Anyone know if they are one and the same and would handle the high power (haha not) output of the 5Ta

https://www.beltingonline.com/at10-synchroflex-timing-belts-30

















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T
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Yes, Synchroflex AT10 is the type of belt.

You need the correct width in mm (measure it) and the number of teeth.


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Cheers TT

The belt listed is 25mm with 73 teeth, and thats what came off the bike

















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I’ve got the same belt (longer though) on a Tony Hayward kit on my pre-unit 650.

It gives no trouble at all.


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Tony Hayward could probably source a belt if he doesn't have one in stock?

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Last time I checked, he didn’t mark up the price much more than the industrial suppliers.


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Thanks folks


















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