The BSA A7-A10 Forum

Technical => Clutch, Primary, Gearbox => Topic started by: Bess on 13.08. 2018 15:50

Title: Re: A10 primary belt drives?
Post by: Bess on 13.08. 2018 15:50
Hi,
     I am contemplating a belt drive, preferably oil free in the primary, I would be interested to hear people's experiences and recommendations.

Many thanks...
Title: Re: A10 primary belt drives?
Post by: gt6uk on 13.08. 2018 18:06
I fitted a Bob Newby clutch and belt drive on my RGS last year and have had no problems. They are not cheap but in my opinion worth every penny.

Steve.
Title: Re: A10 primary belt drives?
Post by: muskrat on 13.08. 2018 21:01
G'day Bess.
Got one made by a fella down here (Melbourne) that uses a Notrun Commical diaphragm clutch on my A10 Cafe. Gearing is a little taller than an RGS and motor pulls it well. About 10 years on the original belt. Run dry but it's an open primary. Luv it to death.
Cheers
Title: Re: A10 primary belt drives?
Post by: harvey mushman on 14.08. 2018 11:58
Hi musky, thats the type im getting for my tribsa. Can you tell me is there any modification reqd to clutch mechanism at gearbox side.

I also have to run it open as the belt is a bit wider so i may use your design as a pattern!

cheers

derek
Title: Re: A10 primary belt drives?
Post by: BSA_54A10 on 14.08. 2018 15:21
Mr Arthur ( retired fireman on here occasionally ) fitted on to his A 10 about 10 years ago.
The only real problem with it had been the fact all the other noises that the primary hid became apparent.
That bike has done 8 BSA National Rallies ridden all the way from Coffs Harbour to the various locations , including Claire , Norriopta , Torquay , Goulburn & Cowra .
Lots of these were better than 2000 mile round trips carrying a big load of camping gear.
So yes they work really well.
Weather they are worth the price is a matter of personal choice.
Title: Re: A10 primary belt drives?
Post by: duTch on 14.08. 2018 15:36

 That's a good cover photo Musky... *whistle*
Title: Re: A10 primary belt drives?
Post by: muskrat on 14.08. 2018 21:15
G'day HM.
The hub is machined to fit straight on the tapered mainshaft. Made by a fellow down in Melbourne (can't think of his name Scarry or similar) sort of like the Quietpowerdrive.
Cheers
Title: Re: A10 primary belt drives?
Post by: coater87 on 15.08. 2018 00:21
 cover sure makes it easy to check that the safety wire is in place. *ex*
Title: Re: A10 primary belt drives?
Post by: bl**dydrivers on 15.08. 2018 00:59
Subscribed!

I’m interested in purchasing a Bob Newby clutch! But debating on a wet or a dry clutch.

Wet = Leaks and Dry = Overheat (as I want the original look with primary cover on).

Are they expensive? Yes, but will eventually pull the plug on getting one and have just purchased a SRM oil pump.
Title: Re: A10 primary belt drives?
Post by: BSA_54A10 on 15.08. 2018 10:14
Steve has a dry belt on his and overheating has not been a problem.
We get roughly California weather down here, perhaps a little hotter and he does long runs generally about 3 to 4 hours at a time and 6 to 8 road hours a day.
Title: Re: A10 primary belt drives?
Post by: Klaus on 15.08. 2018 12:07
I have Newby Belts on all of my bikes *conf2* 4 or 5 for Touring with the original cover on. No problems with the heat.
First belts for many years, plug and ride, forget all the trouble with oil, slipp and drag.

cheers Klaus