CalVin shifting problem help

[aklawok]

 Just got in my last few rides of the year and put up the bike for the season, getting cold out and a storm is comming in starting tonite.
The problem is this and happening more frequently: when upshifting from 3rd to 4th, the pedal sticks "up" not allowing the shift (heal toe shifter so an upshift for me is actually down on the heel) and does not return to a neutral position, I downshift 3-2 and then back 2-3 and same thing happens again, sometimes it resets after a bit ( while in 3rd)  sometimes not. Problem is getting more frequent, never happens on any other shift. Transmission fluid is fine but is due for a change.
Any help that would prevent me from needlessly pulling the tranny would be appreciated.

[Tom H]

Have you tried lubing the shift linkage joints and the pedal pivot? Also make sure the shift lever on the back of the trans is tight and not slipping on the splined shaft.

Hope this helps,
Tom

[aklawok]

Have you tried lubing the shift linkage joints and the pedal pivot? Also make sure the shift lever on the back of the trans is tight and not slipping on the splined shaft.

Hope this helps,
Tom

The shift linkage is ok as the shaft, this is only a problem that shows up when trying to get into 4th gear from 3rd, all other shifts are normal and "Guzzi" smooth (said sarcastically)

[Tom H]

I mentioned the lube because to me if the foot shifter is getting stuck after a shift, it likely would need lube or is binding on something, or as mentioned the lever on the trans shaft could be slipping. Your description of needing to push the lever back to it's normal resting position to be able to shift again would "normally" be a bad shift return spring in the trans. But...for other gears everything's fine. Hmm?

I would think??????? that if a shift fork or gear dog was bad, it would not keep the foot lever from returning to it's normal resting position. I could be wrong on this????

If I were you, I would triple check for the linkage binding and the lever on the back of the trans slipping as well as WD40 the entire linkage and lever and see if it helps.

I hope someone comes along with a better answer that WILL solve your issue!!!
Tom

[aklawok]

All good ideas, I have tried "soft" or partial downshifting to bring back to a neutral position when this happens, and the only thing that does is either find a false neutral or down shift to second ..lather-rinse...repeat. As many are aware, shifting on these Calis' is a clunky affair, normally requires a full clutch and hard press both ways.

[Wayne Orwig]

As many are aware, shifting on these Calis' is a clunky affair, normally requires a full clutch and hard press both ways.

In about 2003 they made a change to the shift detent that made shifting a lot nicer. Your CalVin should have that improvement. It still has the false neutrals but should not take a lot of effort to shift. It almost sounds like a linkage binding. Maybe the shift drum is shimmed poorly and binding. Odd.

[aklawok]

In about 2003 they made a change to the shift detent that made shifting a lot nicer. Your CalVin should have that improvement. It still has the false neutrals but should not take a lot of effort to shift. It almost sounds like a linkage binding. Maybe the shift drum is shimmed poorly and binding. Odd.

Perhaps I over exadjurate, all the other shifting is not hard but certainly must be deliberate.

[Tom H]

I am finding it puzzling that it's only between 3-4 on the upshift. I need to look at a pic of the shift drum where the lever rotates the drum. "Maybe" a bad spot on the drum is causing the lever to get stuck?????

I'll look int this more,
Tom

[aklawok]

I am finding it puzzling that it's only between 3-4 on the upshift. I need to look at a pic of the shift drum where the lever rotates the drum. "Maybe" a bad spot on the drum is causing the lever to get stuck?????

I'll look int this more,
Tom

I have seen some small displacement ATVs and dirt bikes develop bent and warn shift forks, but MG is a different kind of beast. And yes this symptom does not match what I consider typical. Let's hope not! I stated bike is put away for season so plenty of time to speculate. First october storm hitting Nome now.
 Time to do some preseason on the snowmachines....... I need my two stroke smoke fix!! Lol!

[Tom H]

I looked at a shift drum today. It "might" be possible that one of the pins on the shift drum is bent. The (forget the right name) lever inside the trans with the shift return spring, maybe is getting hung up on the "maybe" bent pin?????????

If the issue happened in all gears, it might be a simple answer as to why you need to center the foot shift lever. Return spring. Had to center one many years ago from Yuma to L.A.. Thankfully it was mainly freeway. Worried the whole way that the spring bit might go into the gears.

I am stumped????? Please let us know when you find out the cause!!
Tom

[aklawok]

 Thanks Tom, I was hoping this may have been some sort of common service issue but apparently not. Loose bits in the tranny are for sure my biggest fear, but will wait till next year as I do not have a shop to put it in anyway, and storage is just covered in a connex for winter.
I wish all you southerners a great late riding season, wish I could join you someday.

[Tom H]

I'm going to give another thought, though with the test, all should be the same.

Have you tried having the bike on the center stand so that you can rotate the rear wheel while working the shift peg? "Maybe" (though I doubt it) the foot shift lever is moving more for that gear than it does for other gears and "maybe" binding somewhere along the linkages????

I'm trying to look at things that do not require the trans pulled for inspection. Sometimes a minute detail overlooked could be an easy fix???

Tom

[aklawok]

 All testing will wait till spring, it is snowing here now!