By: Al - 24th May 2012 at 19:53
Some WW2 military Ariels used similar steel chaincase covers when aluminium was at a premium.
That teardrop design over the engine sprocket was used by Triumph and Ariel…
By: Bruggen 130 - 23rd May 2012 at 23:36
bike
I’d say Matchless myself.
By: Easyrider5258 - 23rd May 2012 at 23:02
It is a bike primary cover, the round / jagged hole at the left of the image seems to be non standard or a damaged area, originally I don’t think there would be a hole there, the vertical “slot” in the middle is for the footrest, the upper centre hole would have had a cap / seal and is for adding oil.
The image here is not the same part, its a 1946 Triumph 3T cover and is in alloy, but shows a similar design.
,
By: Lincoln 7 - 23rd May 2012 at 22:47
Got to go with Dr Starangelove on this one, as the 2 round holes and the oval ones wouldnt hold any oil for any possible chaindrive/oil bath, as there are no holes over which a cover could be screwed.
Jim.
Lincoln .7
By: pistonrob - 23rd May 2012 at 21:21
difficult to make out but its a pre 1950/55`s pressed steel chaincase. you have the outer part. the other half would be up against the crankcase and the 2 parts held together by a steel or ally band or by a series of screws as with yours with a rubber or cork (leaky) seal inbetween. its similar to AJS/MATCHLESS
from about 1955 onwards the leaks got a little less
By: Dr Strangelove - 23rd May 2012 at 20:54
Looks more like something off a piece of agricultural equipment to me, drive chain cover off a gang mower or such like?
By: paul178 - 23rd May 2012 at 20:46
Looks rather like a BSA to me.
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May 23, 2012 at 7:45 pm