Sick gearbox

[Late to the party]

Bike: 2000 Quota 1100 ES

Challenge: Transmission only shifts between first and neutral.

Friends, Guzzisti, countrymen, lend me your ear. Need to hear from, or about, a skilled gearbox guy. Purchased a low-mileage Quota last year that had been wrecked. Scattered it. Addressed a multitude of problems, powder-coated the frame and put it back together. Having reassembled the Quota and succeeding to get it to start, run and drive, disappointed was I to learn that the only system not performing optimally was the transmission. It shifts into first, then back to neutral. That's it.

(Sigh)

Upon disassembly the second time (the first time involved welding up a crack in a boss in the rear cover, re-machining that boss, replacing the bearings and seals, shimming the shift drum), nothing was found to be amiss. Nothing bent, no evidence of rubbing or binding. When actuated, the shift drum simply refuses to rotate far enough to engage gears.

If any of you can either advise me or else recommend an individual competent enough to shoo the gremlins out of this gearbox, hopefully somewhere in the Midwest, I would be forever in your debt.

[pete roper]

Methinks the 1st-2nd and 3rd-4th selector forks are in back to front.

[Antietam Classic Cycle]

Methinks the 1st-2nd and 3rd-4th selector forks are in back to front.

  Been there, done that.

[Chuck in Indiana]

Well, at least that's a free fix..

[Late to the party]

Been there, done that.

Many thanks Pete and Charles.

Gave it a try. No go. The forks in question are the same part and, because of their angle, only go in a certain way.

At this point I'd be willing to give up a bag of shekels to any Guzzi gearbox-savvy technocrat willing to give it a go.

Any takers?

Lateness

[pressureangle]

Where are you?

[Chuck in Indiana]

No offense intended at all, but..if it were me, and Pete and Charlie say it's possible to install them wrong... I'd seriously look at how that can happen.
After you shimmed the shift drum, you *did* run it through the gears before reinstalling it on the bike, right? <scratching head>

[Kiwi_Roy]

Is there the equivalent of the pawl centering spring on that gearbox?
Could be just a matter of centering the eccentric?

[Dick]

Keep at it, you will figure it out. Good luck.

[Late to the party]

To Chuck in Indiana,

No offense taken. Yes, I did try out the gearbox the first time. Yes, mistakes were made. Yes, there is always more to the story. Right now, I'm doing damage control. If I can find a competent soul to help me unravel this mess and get back on track, I will deliver, pick up and make it worth their while.

Lateness.

[Late to the party]

And in the event that I didn't make this clear, the gearbox and I are in the Saint Louis metro area.

[Dick]

And in the event that I didn't make this clear, the gearbox and I are in the Saint Louis metro area.

I'd help, but a 13hr drive is a fetch.

[Late to the party]

Is there the equivalent of the pawl centering spring on that gearbox?
Could be just a matter of centering the eccentric?

Did try adjusting what I believe is the eccentric while the gearbox was still in the bike. Quarter turn one way. Try it. Quarter turn the opposite way, etc. Didn't make any appreciable difference.

[Dick]

Are all the drum dowels in place? Layshaft output nut tightened ?

[pete roper]

When assembling the selector forks and shaft it is quite possible to install the two 1-2 & 3-4 back to front. If you used the exploded parts diagram as a guide it in fact shows them the wrong way round!

When they are in the box all three of the bosses on the forks that hold the pegs that engage in the slots in the selector drum should be in a line so the bosses of 1-2 & 3-4 are directly below the boss for the 5th gear selector when it is installed. This is with the box standing on its bell houssing end.

Wip the end case off take a pic down beside the drum and post it up. At least we'll be able to clear it up whether it's right or wrong but I still think this the most likely cause of your woes.

Pete

[gearman]

Now THIS is a post worth following. Unlike my drivel

[Antietam Classic Cycle]

Many thanks Pete and Charles.

Gave it a try. No go. The forks in question are the same part and, because of their angle, only go in a certain way.

At this point I'd be willing to give up a bag of shekels to any Guzzi gearbox-savvy technocrat willing to give it a go.

Any takers?

Lateness

How about Curtis @ Harpers?

[pete roper]

Are all the drum dowels in place? Layshaft output nut tightened ?

Dick, the poor bastard got it back together and back in the running bike before he found out it wouldn't select!

I remember that, in another universe, long, long ago........

[Late to the party]

How about Curtis @ Harpers?

Curtis and I have a good relationship. Will bring him into the loop if push comes to shove. Part of me clings tenaciously to the notion that this challenge can be met at the amateur level.

Many sincere thanks to Pete Roper for weighing in. As has been referenced, many of you experienced these same stumbles a long, long time ago in a galaxy far, far away. Try to keep in mind that there are still those who need to endure these travails as part of their "path".

Lateness

[pete roper]

That's the reason I'm tenaciously clinging to the back to front selector fork theory. It may not be right but it's the most obvious cause and the symptoms are right.

Helping out like this is what it's all about. The only thing that gives me the irrits is when one tries to explain something like this and you immediately get told you're wrong by someone who is clueless and wet behind the ears! :D

Pete

[Chuck in Indiana]

Part of me clings tenaciously to the notion that this challenge can be met at the amateur level.

It can and you can. It's just nuts and bolts. Post up a picture, and all will become clear, grasshopper.. The denizens of WG have walked me through a maze or two..

[Curtis Harper]

Curtis and I have a good relationship. Will bring him into the loop if push comes to shove. Part of me clings tenaciously to the notion that this challenge can be met at the amateur level.

Many sincere thanks to Pete Roper for weighing in. As has been referenced, many of you experienced these same stumbles a long, long time ago in a galaxy far, far away. Try to keep in mind that there are still those who need to endure these travails as part of their "path".

Lateness

Trans rebuilds are generally four hours labor. $85 per hour. Depending on how much damage has been done by previous explorations, price may vary.

[jacksonracingcomau]

On top of selector drum is a big shim, he stops the dowels coming out. Dowels are needed to actually turn drum.


That's my bet, don't ask me how I know, was a long time ago I found out. Same symptom.

And rather than selector forks switched, the sliding selector dogs (often called synchros but aren't) from 1/2 and 3/4 are different and not interchangeable, another possibility

[oldbike54]

 Motors are a piece of cake , electrical stuff doesn't intimidate me at all , but transmissions require voodoo and the waving of dead chickens . They make my spine quiver 

 Dusty

[Chuck in Indiana]

Motors are a piece of cake , electrical stuff doesn't intimidate me at all , but transmissions require voodoo and the waving of dead chickens . They make my spine quiver 

 Dusty

Pfffft. They're just nuts and bolts. The Kid brought his Spot down for me to walk him through putting new gears in the transmission. I told him the blind leading the blind, eh? Once we had it opened up, he said, "Oh.. I see." Nothing to this is there?" 

[smdl]

...but transmissions require voodoo and the waving of dead chickens . They make my spine quiver  ...

 Dusty

Chuck, watch over the chook very carefully -- we don't want to see him ending up as a sacrifice!   

Cheers,
Shaun

[oldbike54]

Pfffft. They're just nuts and bolts. The Kid brought his Spot down for me to walk him through putting new gears in the transmission. I told him the blind leading the blind, eh? Once we had it opened up, he said, "Oh.. I see." Nothing to this is there?" 

 And shafts and gears and shims and forks and drums and ...

 Dusty

[Late to the party]

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To no one's surprise, Pete Roper et al. were right on the money. The shift forks were installed backward.

Shown here is what I believe to be the correct arrangement, although recent history suggests I have been wrong about that more than once already.

Many sincere thanks to all who have helped me slog through this little adventure.

Going to sleep now. Will work on it more later.

Lateness.

[Late to the party]

Motors are a piece of cake , electrical stuff doesn't intimidate me at all , but transmissions require voodoo and the waving of dead chickens . They make my spine quiver 

 Dusty

What Dusty intimates here is the gosh-darned truth. Gearboxes are FULL of black magic.

The image did not load. The chicken must not have been dead enough.

Will work on that later, too..

Lateness

[Two Checks]

Dxamn...another SPII on town...

See, ya never shooda shimed it...