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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 03-03-2012, 10:37 AM   #1 (permalink)
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Belt primary drive conversions?

Just used the search and looked though as many previous threads on this subject as possible. Did my head in man! So I realise this risks reopening a horrible can of worms, but I would really like to hear from anyone who has personal experience of belt primary kits.

I'm not personally interested in the US manufactured stuff (MAP, QPD etc), becuase the import hassles are too much to bother with. What I am really interested in is the Tony Hayward kit, and the cheaper kits that use std T140 plates (or alloy versions of std plates), as sold by LP Williams, the T140 Shope/Shropshire Classics etc.

Anyone out there got one of these on their T140/TR7? Please tell me about it! And to all the quantum physicists, mathematicians and readers of technical articles - I don't mean to seem rude, but it would be great if this thread could be resrved for actual experience rather than taken over by theoretical arguments, which is what seems to have happened to the other attempts to discuss this topic!

Ta very much!
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Old 03-06-2012, 06:58 AM   #2 (permalink)
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I'm answering this primarily to bump it back up to the top of the list.

I have considered the conversion and spoke at length to Tony H.
One thing that has put me off is either converting the bike to run the bike dry, or replacing the belt every 4 years as they age in oil AFAIK.

I've ammended this as I stated 2 years - now it's 4. Maybe in a few years it will be 6-8 years. I don't do large milages by bike anymore

Last edited by DAVE M; 03-06-2012 at 07:00 AM.
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Old 03-06-2012, 08:14 AM   #3 (permalink)
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I have been using belt drive primary's since 1981,1st one I used had a rubber belt and the clutch ran dry.
That one did not stand the test of time after a few thousand miles it wore of all the anodizing on the pulleys also the thrust washer and rollers were also worn out in a short space of time because the kit ran dry which it also posed problems with the breathing as it was a T140.
I believe you can still kits get based on that system,but I binned it after 6 months.
Then I started using kits with a 10mm syncroflex oil proof belt,these kits were far superior to the rubber belt kit.
I have now got several bikes fitted with this type of kit,no problems in over 30 years and many 1000`s of miles off using them,in all types of weather from -10 C to
+ 38 C (Scottish winter and Spanish summer)

Belts do last a long time and are a doddle to change,the last one I changed had been on for over 10 years and was only changed as a precaution as I had a 4000 mile trip planned in a few months.
The kits are available at any good British Bike shop I got some kits from here-

http://www.grintriumph.com/page6.htm
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Old 03-06-2012, 08:52 AM   #4 (permalink)
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Thanks for your replies Dave and Tom, it's good to get views based on experience of using such kits. Tom, are the kits you use the alloy version of the Grin Triumph? I'd be interested to know how well the friction plate tangs and the corresponding slots in the drum wear?
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Old 03-06-2012, 01:39 PM   #5 (permalink)
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spoken at length to Tony Hayward...

Mmmm yes, he can talk can't he?

:-)
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Old 03-06-2012, 03:43 PM   #6 (permalink)
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Quote:
Originally Posted by Steve69 View Post
spoken at length to Tony Hayward...

Mmmm yes, he can talk can't he?

:-)
Ha Ha! Yes indeedy!!!
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Old 03-06-2012, 03:58 PM   #7 (permalink)
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Quote:
Originally Posted by Steve69 View Post
spoken at length to Tony Hayward...

Mmmm yes, he can talk can't he?

:-)
So it was you on the phone all afternoon when I was trying to get through!

I've taken a risk now, and ordered one of LP William's kits - alloy drum, alloy friction plates, steel front sprockey/pulley, uses std T140centre/shock abosrber, uses std steel plain plates. They seem to be very similar (if not exactly the same?) as the kits sold by Burton Bike Bits, Shropshire Classics, Grin Triumph etc (poss also N.Hyde?). Can't be many manufacturers out there producing these, so probably all the same source I'd guess.

About 150 cheaper than Tony Hayward's kit but very likely not as good. Time will tell.... Meanwhile, if anyone out there is using one of these and has found it to be fine, I'd appreciate the reassurance! On the other hand, if you bought one of these and it fell apart within 500 miles, I'd probably rather not know!
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Old 03-06-2012, 05:01 PM   #8 (permalink)
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About 150 cheaper than Tony Hayward's kit
And 21 dearer than Grin Triumph`s !
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Old 03-06-2012, 05:13 PM   #9 (permalink)
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before you fit it, i would be interested in the weight difference,
though that is not the whole store as it is the angular momentum that matters, though it would be interesting to seethe numbers...

-Steve
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Old 03-06-2012, 06:41 PM   #10 (permalink)
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Originally Posted by tomt140 View Post
about 150 cheaper than tony hayward's kit
and 21 dearer than grin triumph`s !
aaargh!
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