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Singles / Re: C15 ss Max speed
« on: 28 January, 2019, 14:09:26 »
My c15 weighs 300lbs.
I cant manage anything heavier
Even some of the later 250 bikes are much heavier.

Singles / Re: C15 ss Max speed
« on: 28 January, 2019, 14:03:52 »
I now have a 17 tooth output sprocket fitted. Top speed is now 80 MPH, on a good day.

Singles / Re: Modern day usability of big singles
« on: 28 January, 2019, 09:29:55 »
The brakes should be OK on an old bike.
My 1954 C15  has good brakes. I can easily lock the back wheel.
The front brake will get near to locking if I put in on hard. I would not do that in the wet.

Singles / Re: Throttle twistgrip doesn't snap back
« on: 28 January, 2019, 09:17:16 »
I would not want my throttle to snap back when released.
Every time you want to hand signal, operate switches, adjust your goggles, scratch your nose etc, you would be slowing down
and holding up the traffic.

Singles / Re: Modern day usability of big singles
« on: 28 January, 2019, 09:07:42 »
I ride a C15 SS.
I see no reason why these old bikes should not be very reliable, as they were 'in the day',
provided they are in good order to start with.
I ride it mostly flat out  when out of the speed limit .(March town is only about a mile wide.)
No brakedowns yet, though I have lost the odd bit falling of. Silencer, Tool set, three times!

Singles / Re: Carb stud washers
« on: 26 January, 2019, 16:01:52 »
I have always used just plain washers, never a problem.
 Thats how they were made.

Singles / Re: B40 stops after 5 mins and won’t start again.
« on: 26 January, 2019, 15:59:10 »
can you get good flow from the carb when you disconect from the carb

Singles / Re: Modern day usability of big singles
« on: 26 January, 2019, 15:56:19 »
I ride  1964 C15.
Spares and parts are obtainable. Try ebay ,but there are several suppliers of new parts.

Singles / Re: BSA C15
« on: 25 January, 2019, 11:46:25 »
My tool kit weighs a bit over 1/2 stone.

Singles / Re: rocker box leak.
« on: 25 January, 2019, 11:15:24 »
I did look at that, but decided there would still not be enough clearance.
In fact, withe engine mounting bolts removed, there was still not enough clearance. I had to remove the rear wheel,
and the chain guard, the n lift the engine  out.

Singles / Re: BSA C15
« on: 25 January, 2019, 11:11:27 »
My tools dont weigh that much. perhaps 1/2 stone.
My own weight is 12 stones, but I dont think dead weight affects top speed, but mainly acceleration.
The limit is due to air resistance, and mechanical friction.

If i rode with my body prone on the tank, I guess a higher speed would be possible.
I would need to remove my wintertime windscreen!
Also fitting a one tooth less output sprocket (back to standard 16 tooth) might do it.
But I dont want to rev the engine too high. My engine is doing 6800 rpm at 80 MPH.
High revs are where the main stresses on the engine happen.

Singles / Re: BSA C15
« on: 25 January, 2019, 06:54:06 »
I carry a complete set of tolls for any job on the bike.
They are in a box on the back of my C15, also handy when working on it.
Includes sticky tape, chain link, rag for oily hands, plastic ties. etc.

Singles / Re: rocker box leak.
« on: 17 January, 2019, 08:00:33 »
The studs were too tight to remove with two nuts locked.
Perhaps they would be easier with the engine hot, but alas
I cannot start the engine anymore!!

Singles / Re: B44ss frame
« on: 14 January, 2019, 07:50:24 »
The Rupert Ratio book shows measurments of frames. Should be a help.

Singles / rocker box leak.
« on: 14 January, 2019, 07:48:25 »
When I assembled my C15SS engine, I used the old rockerbox gasket, expecting I would need to dismantle again later.
I found the engine was fine. no further work needed, except -- leaking rocker box!!
To replace the gasket, the engine has to be removed. A long job, and I needed help to lift the engine.
Next time, I intend to replace the rockerbox studs with hex headed bolts. Then it can be removed with the engine undisturbed.
It should work??

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