Author Topic: fully enclosed chainguard help  (Read 1589 times)

Offline bonny

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fully enclosed chainguard help
« on: 05.04. 2012 20:31 »
i bought a fully enclosed rear chainguard for the a10 a year or two back, i did nothing with it apart from paint it , it is an original bsa one and not a reproduction so should fit perfectly, i know how the thing fits aprt from the very front section , i have looked in the useless haynes manual and it was no help. can anyone tell me how or what it attaches to ? the only thing i can see is two small tubes that run across the front section. do i have to drill the engine plates for bolts ?

Offline trevinoz

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Re: fully enclosed chainguard help
« Reply #1 on: 05.04. 2012 21:32 »
Bonny,
              The front section bolts to the inner chain case. There are two long shallow head bolts for the job.
They also hold the sliding seal plate.
 
 Trev.

Offline bonny

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Re: fully enclosed chainguard help
« Reply #2 on: 05.04. 2012 21:58 »
Bonny,
              The front section bolts to the inner chain case. There are two long shallow head bolts for the job.
They also hold the sliding seal plate.
 
 Trev.

thanks for that trevinoz, its sounding more and more like a fiddly job to get it altogether though  *sad2*.

Offline trevinoz

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Re: fully enclosed chainguard help
« Reply #3 on: 05.04. 2012 22:26 »
I fitted one to my '62 Super Rocket.
The worst job is getting the chain around the gearbox sprocket with the front section in place.
In fact, the front section should be on all bikes with full width hubs but it mostly has been removed either because of the difficulty fitting the chain or because it has been mangled by a thrown chain.
If the section is not fitted, there is an ugly gap between the inner case and the chain guard.

   Trev.

Offline LJ.

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Re: fully enclosed chainguard help
« Reply #4 on: 05.04. 2012 22:31 »
Yep! It's fiddly but well worth the effort, I think they look rather smart too. Before you fix the gearbox sprocket on, just check that the front part will go over the sprocket itself... I cannot remember if I had to remove the sprocket to fit that front part as you don't want to have to remove it again.
Ride Safely Lads! LJ.
**********************
1940 BSA M20 500cc Girder/Rigid- (SOLD)
1947 BSA M21 600cc Girder/Rigid-Green
1949 BSA A7   500cc Girder/Plunger Star Twin-(SOLD)
1953 BSA B33  500cc Teles/Plunger-Maroon
1961 BSA A10  650cc Golden Flash-Blue
1961 BSA A10  650cc Golden Flash-Red

Offline trevinoz

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Re: fully enclosed chainguard help
« Reply #5 on: 05.04. 2012 22:52 »
LJ,
         Just curious, but how do you fit the sprocket with the inner chain case in place?
It would be a cow of a job to have the front section hanging loose around the sprocket and trying to bolt it to the inner case. If you understand what I mean.
My inner with front in place went over the sprocket with a bit of twisting and turning and cursing but I use a standard 19 tooth sprocket, a larger one may cause some added difficulty.

  Trev.

Offline bonny

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Re: fully enclosed chainguard help
« Reply #6 on: 05.04. 2012 23:32 »
it did fit over , i have the whole primary dismantled at the moment , its the last thing i have to do really.   

Offline LJ.

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Re: fully enclosed chainguard help
« Reply #7 on: 06.04. 2012 00:39 »
Quote
Just curious, but how do you fit the sprocket with the inner chain case in place?

Hi Trev... lol. nigh impossible I'd have thought. I read in another thread that Bonny had fitted a 21 tooth sprocket, mine like yours was a 19 tooth and it was awkward, although in the last post he says it did fit over. I was thinking that because of a larger sprocket it might not have gone through the sprocket side hole of the forward part of enclosed chaincase... but it did.  *conf*

But as you say it was a cow of a job I DO remember that much.  *eek*
Ride Safely Lads! LJ.
**********************
1940 BSA M20 500cc Girder/Rigid- (SOLD)
1947 BSA M21 600cc Girder/Rigid-Green
1949 BSA A7   500cc Girder/Plunger Star Twin-(SOLD)
1953 BSA B33  500cc Teles/Plunger-Maroon
1961 BSA A10  650cc Golden Flash-Blue
1961 BSA A10  650cc Golden Flash-Red

Offline bonny

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Re: fully enclosed chainguard help
« Reply #8 on: 06.04. 2012 01:44 »
I bought a 21 tooth sprocket because any british bike i have ever owned has been buzzy at speed, thought a larger sprocket might calm things down a bit. Does the fully enclosed chaincase do a good job at prolonging chain and sprocket life and keeping muck off them ?

Online Brian

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Re: fully enclosed chainguard help
« Reply #9 on: 06.04. 2012 01:52 »
Just one small tip, remember to put the footpeg distance piece in before you fit the inner primary case.

Its one of those "dont ask how I know" things.

Offline trevinoz

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Re: fully enclosed chainguard help
« Reply #10 on: 06.04. 2012 23:07 »
Yeah, Brian, like putting the generator clamping band on before the inner timing cover!!


  Trev.