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General Category >> Rubber Side Down! >> GP shift?
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Message started by chzeckmate on 06/09/15 at 14:36:03

Title: GP shift?
Post by chzeckmate on 06/09/15 at 14:36:03

I really like the GP shift pattern. I became a fan of it over the years and I'd like to make this change to the S40.

Has anyone done this? I know the shift rod won't clear the case if the linkage pivot is reversed but I've been thinking of several options to do it at the lever. Does anyone have any suggestions? Is anyone other than me even interested in reversing the shift pattern?

Title: Re: GP shift?
Post by justin_o_guy2 on 06/09/15 at 14:48:05

you need to make pushes pull and pulls push.
You need a bellcrank.
And a pivot to hang it on.

Title: Re: GP shift?
Post by chzeckmate on 06/09/15 at 15:03:04

415E585F42457444744C5E52192B0 wrote:

you need to make pushes pull and pulls push.
You need a bellcrank.
And a pivot to hang it on.

Agreed, but where to put it is the question? I've been looking at this while my bike is out of commission. I need a clever solution. Got any ideas?

Title: Re: GP shift?
Post by justin_o_guy2 on 06/09/15 at 15:22:54

I sold mine. Don't remember what it really looks like
Down There.

I guess it could be behind the transmission input shaft, it's a gizmo, it may well be more hassle than value.

Title: Re: GP shift?
Post by chzeckmate on 06/09/15 at 15:32:17

617E787F62655464546C7E72390B0 wrote:

...Don't remember what it really looks like...
...it may well be more hassle than value.

I don't mind the hassle. The bike is a paperweight right now. It'll give me something to do :)

Here's a view of it to refresh your memory
http://i1297.photobucket.com/albums/ag28/justin_fisher2/gp_zps4ulkgxkx.jpg (http://s1297.photobucket.com/user/justin_fisher2/media/gp_zps4ulkgxkx.jpg.html)

Title: Re: GP shift?
Post by justin_o_guy2 on 06/09/15 at 16:11:14

Yeah, I can picture it, in my head,but translating it to reality would take a long time.
What is keeping you from making the bike something other than a paper weight?

Title: Re: GP shift?
Post by chzeckmate on 06/09/15 at 16:12:15

091610170A0D3C0C3C04161A51630 wrote:

Yeah, I can picture it, in my head,but translating it to reality would take a long time.
What is keeping you from making the bike something other than a paper weight?

Waiting for the new regulator rectifier to arrive.

Title: Re: GP shift?
Post by Art Webb on 06/09/15 at 21:07:22

I can't really see a way to do it
extend rod beyond the shift shaft and mount to a bellcrank with a shorter rod running back forward to the shift shaft maybe?
a lot of R&D to make that work without binding

Title: Re: GP shift?
Post by chzeckmate on 06/09/15 at 21:32:46

That was the first thing I considered. I also thought about doing it at the pedal. It's definitely going to be a real challenge. I'm determined to do it though.

Title: Re: GP shift?
Post by Art Webb on 06/10/15 at 08:51:59

a very interesting project, even though I don't like the GP pattern myself