Split Primary Chain Case

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PeterW
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Split Primary Chain Case

Postby PeterW » Sun May 05, 2019 10:14 pm

Does anyone know if these were a factory option, an after-market thing or something people modified for themselves?

Seems like a good idea to be able to access the chain & engine sprocket without disturbing the clutch etc

http://www.imcdb.org/vehicle_247575-Ariel-350-1946.html

Simon.Gardiner
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Re: Split Primary Chain Case

Postby Simon.Gardiner » Mon May 06, 2019 12:13 am

As far as I'm aware cutting the chaincase outer is an owner mod!
(I'll make no comment on the descriptions of that single in the photo :? )

SG
'55 Huntmaster, '56 VH, ' 51 VH, '80 R100RT, '00 Sprint ST (but all those Ariel parts can only make one running bike...)

will_curry
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Re: Split Primary Chain Case

Postby will_curry » Mon May 06, 2019 1:47 am

It does make swapping engine sprockets much less of a chore but you don't get something
for nothing. It can be tricky to say the least to seal the joint. Not a problem in it's day
when trialling or scrambling but in these times there can be unfortunate comments made.

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adrie.degraaff
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Re: Split Primary Chain Case

Postby adrie.degraaff » Mon May 06, 2019 3:58 am

I would say it's a 1948-49 VH in the photo becouse it has the new frontbrakedrum.

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Re: Split Primary Chain Case

Postby johnwalsh » Mon May 06, 2019 1:42 pm

I've seen a number of alloy chain cases on different marques with the engine sprocket bulge modified in a similar fashion. One in particular was an AMC twin. It was obviously done by somebody that knew how to machine as it was very tidy and appeared factory spec. As a bonus too it could be a damage limitation device if the engine sprocket should come a drift!!
1958 Huntmaster
1960 Matchless G12
1958 AJS 18s


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