classic motorcycle forum

Motorcycle Discussions => British Bikes => Topic started by: smartfella on March 29, 2015, 01:02:46 PM

Title: Vintage Hand gear change,
Post by: smartfella on March 29, 2015, 01:02:46 PM

Can anyone help.
I'm after the same hand gear changer in this photo.
Cheers.

Title: Re: Vintage Hand gear change,
Post by: chaterlea25 on March 29, 2015, 04:18:30 PM

HI,
The lever needed will depend on which gearbox you have fitted? The one in the photo looks Burman?
Do you know how it fits to the frame?
I may have something similar looking but the frame fitting has been "modified"  :(
Where are you based?

Regards
John

Title: Re: Vintage Hand gear change,
Post by: smartfella on March 29, 2015, 04:30:13 PM

I have an Albion 3 speed gear/clutch box with the gear change leaver fitted to the side. I am restoring the same bike.
Yes it fits to the frame under the Tank.
I live in Cambridge. Thanks for any help.

Title: Re: Vintage Hand gear change,
Post by: chaterlea25 on March 29, 2015, 09:21:22 PM

Hi
I will dig out the parts I have and post a pic
If its suitable I will be going to Stafford Show in a few weeks?

HTH
John

Title: Re: Vintage Hand gear change,
Post by: smartfella on March 29, 2015, 10:27:43 PM

Cheers John.
I cant make the show as I'm abroad but let me know and I will pay for post if you can.

Thanks

Smartfella

Title: Re: Vintage Hand gear change,
Post by: smartfella on June 03, 2015, 04:05:55 PM

Hello John.

Did you manage to find  a gear changer like the sort I'm after.

Thanks.

Smartfella

Title: Re: Vintage Hand gear change,
Post by: chaterlea25 on June 04, 2015, 11:33:58 PM

Hi ,
Apologies for not posting sooner
Sorry the one I had was quite different,  :(

John

Title: Re: Vintage Hand gear change,
Post by: smartfella on June 05, 2015, 06:34:23 PM

Thanks for looking John.
Suppose I will have to endeavor to make one.

Title: Re: Vintage Hand gear change,
Post by: smartfella on June 09, 2015, 02:56:54 PM

Quote from: chaterlea25 on March 29, 2015, 09:21:22 PM

Hi
I will dig out the parts I have and post a pic
If its suitable I will be going to Stafford Show in a few weeks?

HTH
John

Hello John.

Could you(or anyone else) help me out with some measurements of the cut out grooves for the gear changing plate.
I'm making one for a 3 speed Albion gear/clutch box.
I you can't thanks all the same.

Title: Re: Vintage Hand gear change,
Post by: cardan on June 10, 2015, 12:35:47 AM

The position of the grooves depends on everything: the length and angle of the lug on the change lever, the length of the arm on the gearbox, and the angle between the gearbox and the change lever. Not to mention the gearbox internals.

I think you'll have to put the lever you're going to use on the pivot bolt, set up the length of the coupling rod you want to give the angle of the quadrant you want, then mark out on a template the point at which the various gears engage and disengage. The various grooves and shoulders will then be correct for your bike. Locate second half way between where the gear engages and disengages if you can't see inside the box.

Good luck.

Leon

Title: Re: Vintage Hand gear change,
Post by: smartfella on June 10, 2015, 09:46:34 PM

Thanks Leon,

That makes sense. I will just have to keep at it.

Ta

Title: Re: Vintage Hand gear change,
Post by: 33d6 on June 11, 2015, 03:51:30 AM

An easy way to do it is to make your gate in two halves split lengthways and then weld the two halves together when you ascertain the lever positions and have cut the gate out.
Follow Leons advice by assembling everything on the bike without the outer half of the gate. You then pull the lever back as far as it can go for the low gear position. Push it forward as far as it goes for the high gear position. Then search for neutral and middle gear.
It's so much easier to tweak the gate when it's split lengthways. You can cut out each half so much more easily.
Finally when you've got it to your satisfaction you weld the outer half back on and impress everyone with the brilliance of your calculations. Just make sure the weld is cleaned up perfectly.

We want to see and admire a photo of the finished article

Cheers,

Title: Re: Vintage Hand gear change,
Post by: smartfella on June 12, 2015, 01:04:04 PM

Thanks, I will make sure I post some photos.