New 20 spline Convert/Cal II Auto couplers available

[Antietam Classic Cycle]

http://www.mgcycle.com/index.php?main_page=product_info&cPath=35&products_id=5338

[Groover]

Thanks for posting. Which ones is the 6/32 sidecar gears? I thought those were 7/37?

Also, and since we are sort of on the topic.. How are people mating convert automatic transmissions to regular final drives if the splines are different on those (10 teeth I believe). Is there an adapter? Say I wanted to put a convert transmission on a medium length swing arm bike with a 10tooth shaft and final drive, how would that be done?

[fotoguzzi]

Thanks for posting. Which ones is the 6/32 sidecar gears? I thought those were 7/37?

  I wanted to put a convert transmission on a medium length swing arm bike with a 10tooth shaft and final drive, how would that be done?

cut one each coupler in half and weld together a 10/20 coupler.??. BUT I don't think the ratios on any of the 5 speed will work to good as a Convert drive.

[mtiberio]

For a convert (9:34 rear gears) almost all the rear drives from 5 speeds are geared too short. The single exception is an 8:33 rear end which comes out to be the "sidecar" gear set for Converts. Early ones were fine spline, bolt on. Newer ones are coarse spline. You need a split coupler and you have to shorten the pinion spline.

I have had a number of couplers welded over the years. I even had a long one made so I could use a Lemans III swing arm on a Convert. That one snapped and left me stranded (possibly due to the long unsupported mass of the drive shaft and play in the splines). When I have a short one done, I use the counter bored end of the 20 spline coupler, and have the 10 spline end turned down for an interference fit and then welded. Much stronger.

[mtiberio]

http://www.mgcycle.com/index.php?main_page=product_info&cPath=35&products_id=5338

Much cheaper than the last one I bought from Europe...   8^))

[ccoli]

Would using parts from 2 different ujoints work?  Like a 20 spline yoke to fit the trans and a 10 spline yoke to match the LMIII shaft.

[brider]

http://www.mgcycle.com/index.php?main_page=product_info&cPath=35&products_id=5338

You're kidding. I recently paid well over a hundred bones for a NOS one on ebay, then paid a nice member here another significant % of that for a good used one when I thought I lost the new one.

Tempted to buy another one, though....

[Antietam Classic Cycle]

Would using parts from 2 different ujoints work?  Like a 20 spline yoke to fit the trans and a 10 spline yoke to match the LMIII shaft.

If the caps of the joints are the same diameter one could build a "hybrid" u-joint.

[bigbikerrick]

Thanks for the heads up on that Charlie. I paid around $150. for a NOS one over a year ago, from a seller on ebay. Its nice to know new , aftermarket ones are available now, for a reasonable price.   
Rick.

[Roy gardner]

Would using parts from 2 different ujoints work?  Like a 20 spline yoke to fit the trans and a 10 spline yoke to match the LMIII shaft.

That's exactly what I am planning to do when the LemonVert motor goes back into the 1000 LM frame and gets a 7:33 FD for side car work.
I'm pretty sure that the "big", post T3, UJ's share the same cup size & spacing.

Thanks for posting the link, better get me two, one each for the LemonVert & the "standard Round Barrel SoloVert.   

[mtiberio]

Would using parts from 2 different ujoints work?  Like a 20 spline yoke to fit the trans and a 10 spline yoke to match the LMIII shaft.

I have had this done. John Chicoine can do it.

[Roy gardner]

But why? at the bottom of the linked page;
http://www.mgcycle.com/index.php?main_page=product_info&products_id=5299&zenid=3e4fc0984ddaa4bfedf391f1e2d50ece
http://www.mgcycle.com/index.php?main_page=product_info&products_id=5298

I havent checked the lengths

[Groover]

The medium shaft is 180mm (LM3,4,5 Mille, 1000s), which seems the one they don't have.