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850t shifter

derider

derider

Just got it firing!
Joined
Apr 13, 2012
Messages
5
My first post here so first thing,Hello all and thanks for any help.
My shifter on my 1975 850t is just hanging low,i can shift gears by hand moving the bike back and forth.I believe the centralizer spring is broken.If this is the problem is there any way it can be repaired without taking the motor out of the bike?Any other suggestions for fixing this?
 
The attached photos show an external spring assembly which I purchased shortly after destroying several of the internal return springs. The bike was brand-new and I found myself taking it apart for that darn little spring. Supposedly a new spring will last but even though I had a chance to put it in I prefer the external arrangement. It originally came with two flat pieces for the spring but I managed to break those as well. Butter knives are an excellent substitute and work very well. I don't know if such a adaptation is still available and I couldn't even begin to tell you where to look.

You may have to down load the pictures to see the parts.


r2.jpg



return3.jpg


return1.jpg


return2.jpg
 
I put one of those external return spring devices on a T when I had one back in the 70s. I found using multiple blades (from a cheap feeler gauge) was more reliable than the two 0.050 inch pieces that came with the kit. I don't think the assembly is available any more. The new replacement springs hold up well. The job isn't that bad if you crab the frame and just take out the transmission. I've had a bit of practice and can do one in about four hours.
 
tewrecks said:
What is "crab the frame" ? Any pictures?
Click to expand...

There are plenty of examples on the forum. Try a search. If you are unsuccessful, let me know and I'll try to find a picture. The tricky part is removing and installing the rear transmission cover. If you haven't done one before, find someone who has to assist, or just send the transmission to a reliable shop. Also a Haynes manual would be helpful. This would also be an excellent time to check the shimming on the shift drum. Check the archive section for Pete's explanation.
 
I have been taking the engine\transmission out of this bike since 1973. I've done it many times. I lived in Boston when I first bought the bike and the only way to store the bike in the winter, was take it apart and bring it into my apartment piece by piece over the winter and then restore it in the summer. Never once have I found a way to separate the transmission from the engine while it was still in the frame. I'm not saying that it's not possible but in the overall scheme of things it's just as easy to take everything out at one time than it is to screw around. But unless I can see some clear an easy way to remove the transmission from the engine while it's still in the frame it seems just as easy (to me) to take everything out. A picture(s) would help.
 
Pete's procedure has pictures. I use a slightly different technique, but similar results. Crabbing the frame takes about two hours off any job on the transmission, clutch, or rear main. But this won't save any time getting the pieces of your bike inside for the winter.
 
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