GP shift / Reverse shift. Need help before I do something bad

[FastCletus]

All my bikes are GP shift ie 1 up 4 down.  My cb 750 I am working on is standard shift.  I am just getting it together and am noticing on test runs, I am messing  up shifts.  
Is there anyone who has done reverse shifting on this bike and if so what adapter did  you use or how did you do it.  
The quick answer is put rear sets on it, but I would rather not do that just now.  

[shinyribs]

Leave the CB alone and 'fix' the other bikes

[TOOLS1]

shinyribs wrote

Leave the CB alone and 'fix' the other bikes

Ditto, or turn the bike upside down.
TOOLS

[FastCletus]

Hmm how did I know I was expecting that response. I guess I  will have to figure this out for everyone else.

[shinyribs]

 I'm sure you could come up with some sort of reversing mechanism to mount to your frame tube that would push the shift lever downward as you pull up with your foot. Possibly you could even do some internal mods to the tranny to reorient the shift pattern of the transmission itself. I think the second would be pretty tough (financially) to pull off.

  If it were mine, I would mount a shift lever independently on the frame tube with an actuator arm that protrudes off the rear of the shift lever. Connect lever to a modified shift lever in the original location with a protrusion off the front of it. That way when you lift up on your shift lever ( the new independently mounted one) it would push down ( via the rear facing protrusion)on the front facing protrusion on the original location mounted lever causing it to push down,which would correlate with standard Honda shifter rotation,therefore reversing your shift pattern. You would have to build offset into the independently mounted lever to clear all of the working linkages and also to place the lever in a location comfortably reached from the stock foot rest location. There would more than likely be a certain amount of trial and error involved in finding which pivots points, linkage angles and leverages ( length of shifter protrusions)  worked out the best to provide optimum shifter lever travel vs. shifter lever effort required. Especially considering the fact that these bike's original shifter levers are very short in length,and package tightly against the engine case, it leaves very little room to mount such a mechanism.It would be quite simple to achieve,but very hard to relate via text. Does that help any?

[FastCletus]

whew, thats alot of technical terms and this Carolina boy aint that ed'u'macated. I think for now I just ned to make more of a conscious effort regarding shifting. It can be done, but it doens t flow in my mind, cause for the last 7 years i have only ridden gp shift patterns. I made my cb 500t a gp shifter, but I bought rear sets for it. It worked but never the way i wanted it, and it took a lot of drilling and I dont want to do that What i think i really need is another splined attachement that fits to the tranny (the piece that the current gear lever fits on, but just the splined part.) Kind of like what would be on a current sport bike with a quick shift)

[Piute]

shinyribs wrote

I'm sure you could come up with some sort of reversing mechanism to mount to your frame tube that would push the shift lever downward as you pull up with your foot. Possibly you could even do some internal mods to the tranny to reorient the shift pattern of the transmission itself. I think the second would be pretty tough (financially) to pull off.

  If it were mine, I would mount a shift lever independently on the frame tube with an actuator arm that protrudes off the rear of the shift lever. Connect lever to a modified shift lever in the original location with a protrusion off the front of it. That way when you lift up on your shift lever ( the new independently mounted one) it would push down ( via the rear facing protrusion)on the front facing protrusion on the original location mounted lever causing it to push down,which would correlate with standard Honda shifter rotation,therefore reversing your shift pattern. You would have to build offset into the independently mounted lever to clear all of the working linkages and also to place the lever in a location comfortably reached from the stock foot rest location. There would more than likely be a certain amount of trial and error involved in finding which pivots points, linkage angles and leverages ( length of shifter protrusions)  worked out the best to provide optimum shifter lever travel vs. shifter lever effort required. Especially considering the fact that these bike's original shifter levers are very short in length,and package tightly against the engine case, it leaves very little room to mount such a mechanism.It would be quite simple to achieve,but very hard to relate via text. Does that help any?

      HUH
                     THINK I NEED TO READ again..n...again...........................

[shinyribs]

Aw c'mon man. If i can type it sho nuff you can figure it out. I aint all that smart. I tried to make it as clear as possible,but it's really hard to type an idea in to text and make it clear.  For me,at least. lol.Good luck with it bud!

[wes]

i love this forum