Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - VintageBike

Pages: [1] 2 3 ... 26
British Bikes / Re: More Vincent Comet Burman Gearbox Issues....
« on: November 10, 2016, 01:25:58 PM »
Thanks John.

As I haven't removed the inner gearbox cover at any stage, and the timing of the gear selection seems OK as I am getting all 4 gears, I can't help feeling that the grease might be playing a part in this.  It is a "proper" sloppy gearbox grease, but I think I will try adding a bit of oil to it to see if it improves the situation...


British Bikes / Re: More Vincent Comet Burman Gearbox Issues....
« on: November 04, 2016, 07:25:04 AM »
Hello John

Many thanks for your reply.  I don't have the GB gearbox on my vincent.  I have the older BA(P?) type.

This doesn't have the facility to drain or level oil, and as far as I can gather from all of my manuals and the VOC, it should be grease filled (although some say that adding some oil to the grease can be a good idea).  I shall have to look into this a bit further, but unless I have misunderstood the advice, this should be a grease filled box.

With regard to the clutch plates, I have used Surflex.  Where these the plates that you were talking about?



British Bikes / More Vincent Comet Burman Gearbox Issues....
« on: November 03, 2016, 10:07:09 AM »

A little while ago, I had some clutch related issues on my 1954 Comet.  A new clutch centre, plates, pushrod and operating plunger seemed to remove the horrible noises I was getting.

So far so good.

I have removed and replaced the outer gearbox cover so often during this process, I have gradually come to understand the process for timing the gear selection mechanism....  Or at least, I think I have...  But I still have a feeling this may the cause of the issues I still have.  I have also filled the gearbox with gearbox grease as it seemed very dry.

I currently have 4 good gears and a neutral.  This suggests to me that the selection mechanism is correctly timed?  But when changing from 1st to 2nd, 2nd gear is not there.  However, if I make this change in two discrete steps, i.e. go from 1st into neutral and then from neutral into second, all is OK.  But I can't make the change in one movement. 

All other gears seem to select fine in both directions - although some of the down-changes are crunchy if the engine speed isn't right.  I suspect this is down to the new clutch plates being a little sticky and not freeing up fully.

Any ideas why the change from 1st to 2nd could be so fussy?  I have not removed the inner gearbox casing at all, and the gears worked perfectly before I starting messing with the outer cover and clutch, so I can't help thinking that it is something I have done (my golden rule!). Could the presence of grease in the gearbox be a factor in this?

Thanks in anticipation...


British Bikes / Re: Vincent Comet Gearbox Issue
« on: September 16, 2016, 09:39:53 AM »
yep, although it has proved to be one step forward and two steps back.... Took the bike to the IoM for the Manx, and after the first day developed a very nasty whining from the gearbox under load.  The clutch centre splines are on the point of giving out totally, and the pushrod has worn an end toatlly.  So will be rebuilding all that before looking elsewhere..  Good time on the Island though!

British Bikes / Re: Vincent Comet Gearbox Issue
« on: September 15, 2016, 07:06:15 AM »
Sorry for slow update.  John, you were spot on.  The mainshaft nut behind the kickstart cover was loose.  Tightened this up and (after many hours of trying to get the cove back on with the gears correctly synched!) all seems OK.

Thanks for your advice.


British Bikes / Re: Vincent Comet Gearbox Issue
« on: July 14, 2016, 05:52:21 AM »
Thanks for the reply John.  I'll update with my findings.  Thanks for taking the time to reply.


British Bikes / Vincent Comet Gearbox Issue
« on: July 13, 2016, 09:59:54 PM »
Hope someone here can help me...

I have a Vincent Comet (with Burman gearbox).  All has been fine until....

1. A lot of slack suddenly appeared at the clutch lever (within a 1 mile journey).  Someone else was riding the bike at the time.  I adjusted the slack out by removing the small cover on the gearbox and adjusting the nut on the actuating lever fulcrum.  Clutch then seemed OK.  Not sure what brought this on, or whether it is relevant to the next issue....
2.Immediately after the clutch issue, when sitting with the engine running and  in neutral, I could here the sound of gears occasionally just catching each other, like the sound that you sometimes  get when in a false neutral.  Otherwise gears were fully functional and OK to ride home.  Further examination has confused the hell out of me.  With the bike on the rear stand, all gears (and neutral) can be selected.  However, as soon as the bike is taken off the stand and I sit on the saddle, the bike falls out of neutral.  It is then very hit and miss as to whether neutral can be selected.  As soon as the bike is back on the stand, or I dismount, then neutral is possible.

Has anyone any idea what I should be looking for when I strip down?



Classic Motorcycle Sport / Re: HELLO RACERS-
« on: December 17, 2012, 11:37:05 AM »
Sounds great.   Keep us posted on dates etc as I would certainly like to come down to take some pictures etc.

Good luck with your venture.


British Bikes / Re: Any Ideas On Value?
« on: November 28, 2012, 10:52:12 AM »
Here is a link that you may find useful.
Bear in mind though that auction prices usually far outstrip prices that you might gain from a private sale.


Wanted Bikes / Re: Front brake cable adaptor (lever end) required ?
« on: November 07, 2012, 11:43:42 AM »
Is this the type of device you mean? 


British Bikes / Re: Speed Twin Advice.
« on: November 07, 2012, 11:38:28 AM »
Hi Jim,
Bad luck indeed.  I hope you make a full and speedy recovery!


Hi Jim,

it certainly isn't an MoT requirement as I have just MoT'd my CS1 with no front mudguard.

British Bikes / Re: Old Adverts -Still miss Exchange & Mart!
« on: July 27, 2012, 05:12:57 PM »
Very good!  I particularly like the Norton Jubilee advert.   Nothing like the Jubilee I rode!


Site Feedback / Re: info for administrator
« on: December 30, 2011, 02:03:07 PM »
Sorry about that.  Gremlins in the works...  It is all sorted now - I hope....

Happy New Year!


Pages: [1] 2 3 ... 26