Author Topic: bob newby clutch  (Read 1001 times)

Offline rocker21

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bob newby clutch
« on: 03.11. 2016 12:56 »
any one had any experience of a bob newby clutch and belt drive? just got one to fit to my A7ss . i know they need some ventilation to make them work properly and wondered how best to do this while still keeping it looking original .
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Online Klaus

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Re: bob newby clutch
« Reply #1 on: 03.11. 2016 13:12 »
any one had any experience of a bob newby clutch and belt drive? just got one to fit to my A7ss . i know they need some ventilation to make them work properly and wondered how best to do this while still keeping it looking original .

Hi rocker,

yes me *smile*
All my bikes run with BNR or NEB belt drives. No drag and slip,no oily spots easy to fit its plug and play.
Its a fairy tale that the belt need ventilation, doing this for years without and still runs with no problems.
It worth the money *wave*

cheers Klaus
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If you think, everything is under control, you are not fast enought.

Offline rocker21

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Re: bob newby clutch
« Reply #2 on: 03.11. 2016 13:27 »
ta for that info Klaus
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Offline Triton Thrasher

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Re: bob newby clutch
« Reply #3 on: 03.11. 2016 20:39 »
Another vote here, for what Klaus says.  I've been using a Synchroflex belt, like what NEB uses (I think) without case ventilation for many years.

If you chicken out and want discreet ventilation, make gaps in the primary case gasket.
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Online gt6uk

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Re: bob newby clutch
« Reply #4 on: 04.11. 2016 19:55 »
I recently fitted a Bob Newby clutch with belt drive and the advice he gave me was that no ventilation is needed for normal use. With having a rrt2 gearbox he suggested leaving the drain plug out and fitting small O rings over the screws before replacing the chain case which leaves a small gap which is not noticeable. They are not cheap but beautifully engineered and i think worth every penny.

Steve.
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Offline danma

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Re: bob newby clutch
« Reply #5 on: 04.11. 2016 21:06 »
 I have one on another bike and can't fault it.

 Very robust, earlier this year I dropped a screwdriver while fiddling with the carbs and it fell onto the bottom belt run  and round the rear pulley till it hit the chain and battery carrier - horrendous noise. No damage to belt or pulley but side of battery carrier bent .

 It has also munched a glass fuse so keep important body parts well clear.
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Offline Rocket Racer

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Re: bob newby clutch
« Reply #6 on: 06.11. 2016 02:59 »
I can recommend (BNR) them too, yes mine is ventilated and both inner and outer heavily cut away so I can strip very easily, but its also lugging two middle aged blokes off the line with a third wheel and no mercy given.
no problems in the six years its been fitted and raced.
But I'd agree with Klaus, ventilation not necessary.
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A good rider periodically checks all nuts and bolts with a spanner to see that they are tight - Instruction Manual for BSA B series, p46, para 2.
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Offline rocker21

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Re: bob newby clutch
« Reply #7 on: 07.11. 2016 12:18 »
many thanks for all the useful comments, looks like my A7ss should not have any problems .
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