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Old 10-20-2011, 09:23 PM   #136
D.Bachtel
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Location: Nipomo ,,,, Where HWY 101 and HWY 166 collide!
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In the meantime I've been extrapolating data from BMWs from the same era.. got to be close to what I need. Not bad as a guide. Zundapp is more of a short stroke though (75x67) with a longer piston and an extra set of rings.

Bore to skirt at .005. Ring gap .012 with a .018 max ?
I dunno...

Don in Nipomo

D.Bachtel screwed with this post 10-21-2011 at 06:00 AM
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Old 10-20-2011, 09:28 PM   #137
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Originally Posted by D.Bachtel View Post
In the meantime I've been extrapolating data from BMWs from the same era.. got to be close to what I need. Not bad as a guide. Zundapp is more of a short stroke though (75x670 with a longer piston and an extra set of rings.

Bore to skirt at .005. Ring gap .012 with a .018 max ?
I dunno...

Don in Nipomo
i sent you another PM with some info.
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Old 12-19-2011, 05:54 PM   #138
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Zundapp obsessed

I didn't know how to work on a lawnmower 5 years ago and decided to get an old scooter.
Didn't want a vespa or Lambretta. Saw a Zundapp Bella for sale and fell in love and bought it.
By necessity I had to learn how to wrench on it. Since then I've owned and repaired and restored 16 Zundapps including 3 two stroke motorcycles--mostly Bellas.
I found 2 KS 601s this fall and am knee deep in restoring one now.
Can't wait to see how she rides.
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Old 03-24-2012, 03:24 PM   #139
D.Bachtel
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Wink Still here... still nuts.

Seems like decades ago I drug this home..





Rolled it out into the sunshine today for a little air. Couldn't hurt.





It's going back together slowly but surely, can't scrub all those parts forever. Rags are getting cleaner and everything has been fitted up at least twice.
I'm working with about 96% original hardware. Rings, gaskets and other bits (washers and nuts) are the only "new" parts.







Well scrubbed elephant.








I was hoping for an Easter startup, within range but life tends to alter plans. Wants and needs again.




Don in Nipomo
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Old 03-24-2012, 05:34 PM   #140
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We came down Highway 1 from Morro Bay on our sidecar in February.....I saw a sign "Nipomo - 9 miles" off the Coast Highway while winding through some eucalyptus groves. Nipomo rang a bell but I couldn't remember why.
Now I remember!

You have a lot more patience than I could ever have on a project.
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Old 03-24-2012, 05:38 PM   #141
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wtf?
looks like a nuclear proof 1 speed. but what do I know.
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Old 03-24-2012, 05:39 PM   #142
D.Bachtel
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Originally Posted by bmwhacker View Post
We came down Highway 1 from Morro Bay on our sidecar in February.....I saw a sign "Nipomo - 9 miles" off the Coast Highway while winding through some eucalyptus groves. Nipomo rang a bell but I couldn't remember why.
Now I remember!

You have a lot more patience than I could ever have on a project.

Hell, you should have made a right turn at Willow Road and stopped by...
Free tours of the preservation studio still available. Perhaps on your return trip. I would love to see that BMW of yours.


Don in Nipomo
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Old 03-24-2012, 05:46 PM   #143
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Hell, you should have made a right turn at Willow Road and stopped by...
Free tours of the preservation studio still available. Perhaps on your return trip. I would love to see that BMW of yours.


Don in Nipomo
We're heading back to MT. on Monday from Yuma. We'll likely take another trip up that way next Winter. Maybe you'll have it running by then.......
We attended the Death Valley Airhead Rally in Feb. then cut over to the coast through Lake Isabella, Bakersfield, and some other "middle of nowhere" mountain ranges. What a great ride. Wore out my sidecar tug tire in a 1000 miles and had to find one in LA..... Sidecar driving / L.A. Freeways were a rough mix. At 65 mph I felt I was standing still. The 405 Freeway was a real experience due to the terrible road conditions and insane traffic. Scary! but we got around unscathed!...decided to take another shortcut on the 710 Freeway...missed my turn and ended up crossing the big shipping channel bridge into Long Beach Harbor....nothing like a country bumpkin lost in the City...
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Old 03-24-2012, 06:49 PM   #144
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Quote:
Originally Posted by 100mpg View Post
looks like a nuclear proof 1 speed. but what do I know.

Main shaft, lay shaft, 4 sets of gears with their own duplex chains.
Sliding engagement within layshaft assembly selects one set at a time.
Tank transmissions used this design.



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Old 03-25-2012, 01:28 PM   #145
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Originally Posted by D.Bachtel View Post
Main shaft, lay shaft, 4 sets of gears with their own duplex chains.
Sliding engagement within layshaft assembly selects one set at a time.
Tank transmissions used this design.



Don in Nipomo
How do the cognoscenti pronounce Zundapp? A guy I knew had a Rickman with a Zundapp 125 motor and said it was pronounced tsween-dopp. That 125 had the same type of shifting as you've described, but the selector moved an internal key to engage gear sets, sans the chains. Sachs 125s used a similar mechanism and both transmissions were known for false neutrals. Hodaka made it work with a spring-loaded selector, engaging internal balls in the gear sets. What vintage of tank transmission used chains? The M60s and M1s are all I've seen, and they had gears. The M1 uses planetary gears and must have been designed by a team of genius-level engineers, IMO. Watching an animation made me feel uneducated, at the least. That is a beautiful project you have.
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Old 03-25-2012, 04:45 PM   #146
D.Bachtel
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How do the cognoscenti pronounce Zundapp?
Not sure really I just say zun as in sun dapp, I've heard others pronounce it Zuune as in tune dapp.


A guy I knew had a Rickman with a Zundapp 125 motor and said it was pronounced tsween-dopp. That 125 had the same type of shifting as you've described, but the selector moved an internal key to engage gear sets, sans the chains. Sachs 125s used a similar mechanism and both transmissions were known for false neutrals. Hodaka made it work with a spring-loaded selector, engaging internal balls in the gear sets.


What vintage of tank transmission used chains?

I don't know.... someone just told me that, not really versed on militariana.

I had no idea what this bike was, just popped up on Craigslist last August, it was cheap, fairly complete and close by. Had to make a move .



The M60s and M1s are all I've seen, and they had gears. The M1 uses planetary gears and must have been designed by a team of genius-level engineers, IMO. Watching an animation made me feel uneducated, at the least.

That is a beautiful project you have.
Thank you, it is stunning with all the preserved patina, certainly a contender in the "scruffy" class. Should run soon, I'm being careful, don't want to screw anything up.
My finger tips are getting worn twisting everything on and off repeatedly. Check-check, clean, polish and check again.


Don in Nipomo
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Old 08-10-2012, 07:57 PM   #147
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Laugh





Been almost a year since I picked this up. I make a little progress every day.

Heads are on, carbs are done. I'm close to firing it up on it's centerstand with a remote tank just to achieve a reasonalble idle before I run it in.
I need to update my photobucket but here's a link to a few photos.




http://s25.photobucket.com/albums/c5...view=slideshow




Don in Nipomo
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Old 08-10-2012, 08:12 PM   #148
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It looks great!

But, I dont like the way this gaskets fits...
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Been almost a year since I picked this up. I make a little progress every day.

Don in Nipomo
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Old 08-10-2012, 08:15 PM   #149
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Congratulations on sticking with the project! What a great bike! It looks like the bike was well cared for by its previous owner and so much original hardware, controls, body work and suspension was kept. What a great place to start from!
My 53 Indian Chief was a very incomplete basket case, and its been 8 years since any progress has been made. I've decided it will be my last restoration, and I will sell my panhead to finance the remainder of the Chief restoration.
Excellent patience on your part as well!
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Old 08-10-2012, 08:24 PM   #150
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Looking good Don. Thanks for posting. I thought you'd fallen off the edge of the earth.
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