80 gs 550e. probably a bad transmission. help me diagnose/replace it!

[egetron]

Hello guys, It's been a while, but since my last post. I've actually decided to ignore all of your sound advice and dive into the case myself.

So as I mentioned earlier, I was expecting to find missing teeth, clearly bent shift forks, or some other clear sign of trouble, but upon initial inspection, everything looked like it was fine. This was disheartening, because I didn't want to have torn apart my case when the actual problem was something simpler.

Anyway, upon more careful inspection, comparing the transmission I received from ebay and the one in my bike, I realized that the engagement dogs on my transmission were actually pretty rounded off. Are the ones that I highlighted for the second gear? Have I found my problem? It's hard to tell from the picture, but the dogs (are these the dogs?) that I've circled in the picture on the left are actually pretty worn on the corners, at least compared to the "new" transmission I have.

It seems like I might as well replace the old transmission with the "new" one.

The only problem with the new one is that when I spin the bearing on the shaft, it seems to not be so smooth. Will this take care of itself once they are oiled? Or do I need to replace the bearings on the "new" tranny.

 

[almarconi]

What you need to inspect are the slots on the inner side of the gears and the dogs that engage the slots.

Here is a picture of a worn gear slots

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Here are some worn dogs

The bearings typically get little wear since they are covered in oil. If yours are notchy then they should be replaced. Also carefully inspect your shift forks and shift drum for wear.

 

[egetron]

Does anyone have any pictures of non-worn transmission dogs and slots? Do they come
From the factory with a slight bevel or are they sharp edged? Trying to gauge the status of this eBay transmission.

 

[almarconi]

Why not post some pictures of your gears? The edges are not really sharp but machined and square, not rounded and worn looking.

 

[egetron]

came out of my bike; have I found my problem?:

here are the replacements I have; you think swapping in these will fix my problem?

thanks all.

 

[almarconi]

Why are you being lazy? All you need is snap ring pliers to remove those gears. Once you have them removed you can inspect all the gears including the ones on your ebay transmission.

To answer your question, your gear looks pretty worn out. I'm sure if you inspect the dogs of the mating gear it will also be worn. The replacement looks a little better but still has wear on it. If you don't plan on keeping the bike just install the used parts and hope for the best. If you plan on keeping it, replace the worn out parts with new parts.