C: Clutch Comet Burman clutch questions
- Thread starter craig
- Start date
A Ball Bearing !!,
I have just fitted one of Timetravellers Mods,
I like it , But now think I should put a Thin steel shield around the drum ,
To make it even better.
I have just fitted one of Timetravellers Mods,
I like it , But now think I should put a Thin steel shield around the drum ,
To make it even better.
Or better still. Cut down the pushrod, re- harden, fit a tappet from a small side-valve Briggs and Stratton motor mower engine. Or, if you actually want to spend money, Royal Enfield have a needle roller lifter that suits.
I can't see if the ball is missing on yours Craig ?,
This is T.T.s mod' , I find the balance on the springs is more easy with the mod' ,
The old type can change with the heat,
Mine was Perfect after the mod', Till I had done a few miles ,
They were old plates which I just wiped,
Then the oil got to the plates and made gear selection not SO good, But still good,
It always been a nice clutch !,
So next time it's in bits, I will weld a cover round the drum ,
To keep excess oil off the plates.
Cheers Bill.
I think I had to bore out the centre hole in the plate a Nats !, To take T.T. s Mod.
This is T.T.s mod' , I find the balance on the springs is more easy with the mod' ,
The old type can change with the heat,
Mine was Perfect after the mod', Till I had done a few miles ,
They were old plates which I just wiped,
Then the oil got to the plates and made gear selection not SO good, But still good,
It always been a nice clutch !,
So next time it's in bits, I will weld a cover round the drum ,
To keep excess oil off the plates.
Cheers Bill.
I think I had to bore out the centre hole in the plate a Nats !, To take T.T. s Mod.
Attachments
Just to point out that the first of Bill's pictures is the kit for twins, which was the first one I designed. It is true that with the Burman clutch I designed it in such a way that one has to increase the diameter of the central hole. The insert is different between the twins and singles. The design is intended to help to lift the plate squarely as well as to reduce wear.
Sorry Norman, Too early for me 
.
.No problem Bill. Most of the bits look the same so anyone can get some idea of what is used for the Comets.
Thank you. It seems the Burman clutch cover would have an inserted steel ball, but I dont find this ball referenced anywhere in Burman literature.
If there were a steel balls, both have fallen out, so this is a loose piece when installing?
What is the stack length/components of a Burman clutch rod, without splitting it.
1/4" ball, 11¼" rod, 5/16" ball, fork end?
If there were a steel balls, both have fallen out, so this is a loose piece when installing?
What is the stack length/components of a Burman clutch rod, without splitting it.
1/4" ball, 11¼" rod, 5/16" ball, fork end?
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Hello Craig, I think the ball is held in by Tapping with a hammer on the edge ?,
I always use 2 rods with a 1/4" 1/4" roller in the middle on Comet and Twins,
If I change clutches, I can alter the length by adding rollers,
For Racing.
Norman was worried about the length using His Mod ' ,
But I found I only needed to adjust a small amount at the gearbox.
I always use 2 rods with a 1/4" 1/4" roller in the middle on Comet and Twins,
If I change clutches, I can alter the length by adding rollers,
For Racing.
Norman was worried about the length using His Mod ' ,
But I found I only needed to adjust a small amount at the gearbox.
Hi Norman,
The post-war 500 clutch pushrod is a one-piece 1/4" silver steel rod. I have never had a problem with it being one piece or heard it mentioned as a general problem on the 500's pre- or post-war.
My book of notes on post-war clutch pushrods says:-
Ron Kemp- 11.1/4"
Ed Stevens- 11.3/8" not 11.5/8"
Know thy Beast - 11.3/8" long or 2 x 5.9/16" and a 1/4" roller.
Robin [Blackwell I guess?] -11.1/4", cut in half and 2 x 1/4" x 5/16" rollers.
Clearly originally they fitted them with a finite length, but we're some years away from that now.
A dogs breakfast, depending on the number of clutch plates and lots of other variables, I just make the pushrod to suit the individual bike.
I'd just send the kit out with an explanation to replace or trim the clutch pushrod to length and re-harden.
Hope that's of some help.
Delboy.
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