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C: Clutch Comet Burman clutch questions

craig

Well Known and Active Website User
VOC Member
20220103_BumanClutch1.jpg
Sumpthin go in this Burman clutch cover recess?
Just the clutch rod?
Thank you
Craig
 

erik

Well Known and Active Website User
VOC Member
Yes Greg! The slot should point towards the cable.The adjustment screw on the backside of the box where the cable run through is so long that there should be no problem to find a convenient length for the lever on the handlebar.Erik
 

chankly bore

Well Known and Active Website User
Non-VOC Member
Originally the Comet gearbox had no adjuster at the cable entry, just a plain slotted abutment, G94/1. Most gearboxes, however do have a 3/8" C.E.I. thread there. Panther gearboxes have an adjuster there because it is easier to get at than the Comet. I sometimes do fit an adjuster, though it is a bugger to reach, but fitting an adjuster in the cable about 15 inches back from the gearbox entry is an easier wheeze for adjustment. The original cables had an adjuster right where it scrapes paint off the top fork link. Not the best plan. I've not noticed a taper in the fork end, but these old eyes aren't what they used to be; they used to be my knees.
 

revderek

Website User
VOC Member
Not a reply, but request for related info.
What's the thread on the kickstart end of the mainshaft (post-war)? The nut I have (found in the bottom of the outer box) is totally munted & wasn't, I think, correct anyway.
 

Martyn Goodwin

Well Known and Active Website User
VOC Member
Not a reply, but request for related info.
What's the thread on the kickstart end of the mainshaft (post-war)? The nut I have (found in the bottom of the outer box) is totally munted & wasn't, I think, correct anyway.
The nut you refer to holds the mainshaft in the gearbox. If the nut is removed its possible to then simply slide the mainshaft, complete with the clutch, out from the drive end of the box. Also the kick start would not be operational. See attached.
 

Attachments

  • Burman BAP Main Shaft End Float.pdf
    499.1 KB · Views: 18
Last edited by a moderator:

chankly bore

Well Known and Active Website User
Non-VOC Member
Er, mine's bigger'n' yours! 5/8" x 20 t.p.i. .920" hex. as supplied by V.O.C. Spares and as tabled in "Know Thy Beast." Saying that, however the Spares Co. item is poorly machined and too wide endwise. Some original nuts I've seen had the first couple of inboard threads relieved, possibly to better locate the driving ratchet. The possible good news is that your mainshaft, if it is 1/2" diameter here may still serve as long as all other dimensions are kosher, particularly at the clutch end. The clutch end nut is the same thread but a 1.300" hex. A pleasure to note the term "munted", my Kiwi mate uses it all the time. Can you provide the derivation?
 

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