Recent Posts

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91
The Star and Garter / Re: Gold Star admirers in the sixties
« Last post by LJ. on 19 February, 2018, 16:31:27 »
Looks like the Mods went across the road.  ;D
92
The Star and Garter / Re: Gold Star admirers in the sixties
« Last post by Daniel on 19 February, 2018, 16:24:11 »
Dear AWJDThumper,

I just found this picture in pinterest without additional information. I thought BSA people will like it and I am happy to see your interest.
93
The Star and Garter / Re: Gold Star admirers in the sixties
« Last post by AWJDThumper on 19 February, 2018, 14:46:20 »
Fascinating photo - do you know where it was taken? The two new machines in the foreground appear to be Norton Dominator Delux's which would make the photo from the early 1960's.
94
The Star and Garter / Re: Gold Star admirers in the sixties
« Last post by Old Biker on 19 February, 2018, 14:21:00 »
Great pic thanks for sharing, could even have been this Old Biker back in the day!
95
Singles / Re: B40WD gearbox oil level
« Last post by AWJDThumper on 19 February, 2018, 13:46:25 »
That's par for the course - hopefully, its not the gearbox sprocket oil seal!
96
Singles / Re: Trials specifications for C15
« Last post by AWJDThumper on 19 February, 2018, 13:44:32 »
The attached table gives the overall gear ratios for a standard 1961 C15 (Col 1) and C15T (Col 2) with the gearbox (GS) and rear wheel sprocket (WS) sizes indicated. Column 3 shows the C15T gearbox ratio comparison with standard C15 if the 4th gear ratio is made the same and gives some idea of the differences in ratios provided by the C15T lower gears - obviously, the C15T gearbox offers much higher 1-3 gear ratios. In all cases, the engine sprocket and clutch sprocket are assumed to be same; namely, 23/52T.

For a trials bike, which is intended for both road and off road, it's difficult to get the balance right with the gear ratios. You need to work out what 4th gear ratio you can get away with on the road and then see whether the resulting 1st and 2nd gears are then low enough for off road. As a comparison, the B40WD has similar gear ratios to those shown in Column 3 and can do 50 mph in top but the lower ratios (especially 1st and 2nd gears) are next to useless on the road but not too bad off road. Changing gearbox sprocket would obviously change that balance between the gears.

In terms of the difference between the standard (1961) C15 and C15T, the latter used a different camshaft. It also used an oversized inlet valve. There was also a higher compression piston (10:1) available compared to the standard 8:1 piston.
97
Singles / Re: B40WD gearbox oil level
« Last post by Triumph2000 on 19 February, 2018, 11:48:48 »
Yes, original ratios still fitted, only need 3rd and top on the road.

My next task, having put oil in, is to find out where it's coming out!

We have a nice puddle underneath
98
Singles / Re: 1957 B31 Maroon colour scheme
« Last post by AWJDThumper on 19 February, 2018, 10:48:47 »
You might even find chrome under the mudguard outer paint layers!
99
Singles / Re: 1957 B31 Maroon colour scheme
« Last post by JulianS on 19 February, 2018, 10:31:30 »
I expect you will find chrome under the tank paint - look under the badges or around the neck of the filler.
100
Singles / Re: 1957 B31 Maroon colour scheme
« Last post by Matchymarty on 19 February, 2018, 10:21:15 »
This is the bike we have.
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