1941 Zundapp KS600 project Motorcycle
Heres a fully detailed restoration project almost finished. Complete KS600 on an altered (but usable) K500 frame, painted in WH grey scheme. Also with many additional parts, including a replacement K500 frame, as well as the number-matching K500 engine for that frame, plus the K500’s transmission and final drive. This is a great bargain, read the details you get. You wont find a more detailed deal than this for the price.

Rebuilt 1941 KS600 engine

1. With all-new Hommes internals on machine shop-reworked crankshaft and flywheel, all new bearings, new Hommes shell bearing connecting rods, new Hommes pistons and rings, new Hommes higher HP camshaft, new Hommes high-output oil pump, new seals, new Hommes modern oil filter, machine-shop rebored cylinders (could use a semi-gloss black powder coat to make them really nice). Engine case was not media blasted so original surface pattern is intact. Also have new oil filler tag for eventual attachment. New breather and spring. Proper oil dipstick, unaltered front engine cover, top engine cover, and a usable set of carb shields/covers. Camshaft timing properly set according to the Zundapp service bulletin (which my mechanic translated to English with the help of a German neighbor).
2. New, proper air filter, new bakelite carb spacer, newly rebuilt Bing 2/26 carb from Firma Tillmann, new cables.
3. New 12V 150W MZ-B magdyno setup.
4. Several cylinder heads, in which a completely new set of valves, springs, guides and retainers is installed (though those aren’t in the heads currently installed in the engine). Heads in engine have decent guides and seats, decent valves, good spark plug holes and they’re right for the KS600 (input flange at the correct angle and with matching bores). Currently set up with proper pushrods and adjusted with proper gaps.
5. New clutch springs, new Hommes friction plates, new throwout bearing, proper push rod with intermediate single ball bearing, proper actuation arm with bearing-top adjustment screw and locknut. Flywheel flange was slightly ground and sleeved to yield a smooth sealing surface for the rear engine seal.

Rebuilt transmission:

1. All new bearings and seals, drive chains hand-selected from a complete set of new and the good original chains to yield a set with equal tension when installed (resulted in 2 new chains and 2 original chains). Also includes the remaining 2 original chains and 2 additional new chains.
2. Case cleaned inside and out but not media blasted so original surface is intact
3. New kick starter and shift lever rubbers
4. Gear shifter cleanly shifts through all gears and finds the proper neutral
5. With new Hommes rear drive cup (and mated driveshaft flange, described later)
6. May need a new gasket or case sealing to cure a leak
7. Complete, new (from Aichner) hand shifter assembly including actuating rod
8. New kick starter gear just arrived from Aichner and is awaiting installation…the one in the transmission right now is missing the first tooth

Complete driveshaft (not to be overlooked, as all the parts in the driveshaft represent around a $400 or more investment):

1. New driveshaft (the bar in the middle with the splines on each end)
2. new outer sheath
3. new drive flanges for each end (fit to the transmission and final drive drive cups)
4. new “donut” seals
5. new “cup” seals and steel retaining rings

Rebuilt final drive (note that the sale also includes an excellent, complete K500 final drive as well with smooth, tight bearings)

1. All new bearings (though the worm gear shaft bearing arrangement is slightly different than the original configuration), as well as a new end-of-the-worm-gear needle bearing (found only in the KS600 final drive)
2. all new seals
3. new Hommes worm gear and gearwheel (teller und kegelradsatz) with solo gearing
4. final drive housing cleaned inside and out but not media blasted so original surface is intact
5. rear (and front) brake shoes relined by Bench Mark Works (Craig Vechorik) with softer braking material and hand-worked to fit the older of the two included wheel sets

Exhaust:

1. New Hommes KS600 exhaust system, sprayed with POR15 Black Velvet high-temp flat black

Sheet metal:

1. New military-style front fender (with license plate brackets and hand painted lettered plates front and rear)
2. Dent-free tank cover with toolbox and new toolbox lid, with new Hommes keyed lock (and I have the keys!)
3. new (not installed) rear fender from Aichner (original, slightly dented rear fender currently on the bike)
4. new rear fender rack from Hommes
5. original headlight shell – needs proper headlight rim (uses Dnepr headlight rim now, looks OK)

Electrical:

1. The aforementioned 12V 150W MZ-B electronic magdyno (inside a housing shaped exactly like the original Noris generator and regulator combination, with new chrome cover)
2. new cloth-wrapped wiring harness from Hommes (though configuration not guaranteed to be routed accurately – looks good and properly connected for full electric operation)
3. new ignition switch with proper key
4. new, proper in-headlight high/low beam selector with cable and proper handlebar switch, all hooked up and working well
5. new Hommes repro speedometer
6. new taillight
7. 12V sealed battery (though doesn’t look original – empty, original looking hard-rubber cases are available, which can house a smaller gel battery or non-battery electrical buffer, as the MZ-B can run without a battery)
8. 12V bulbs installed
9. Working generator light
10. Working, original-looking horn (though it’s a slightly larger old Bosch horn from a VW beetle)

Wheels:

1. The wheels on the bike are good hubs with not-so-great rims and bad spokes. Hubs have new sealed 6204 bearings installed. Have new tubes and tires. Also included is a great set of original wheels (waiting a light blasting to remove slight surface rust before painting), with original hub internals awaiting new bearings, and new caps from Aichner.

Fork:

1. Proper complete KS600, 2-spring fork with new oil damper lever (not broken like most originals), complete steering damper assembly
2. the top 2 bushings on the fork could use a replacement, as they exhibit some movement when applying the front brake and rocking the bike forward and back)
3. new KS600 headset bearings from Hommes for use when transferring the bike parts to the replacement frame
4. usable front brake plate (though with a different top retaining bolt configuration) with functioning speedo drive assembly installed and new speedo cable
5. Front brake cable not the original configuration but a new cable and the whole assembly works well. Now I have the needed part (from Aichner) to connect the proper cable to the front brake actuating arm in the original manner.
6. Front hub assembly with new bearing and proper LH thread wheel carrier and lug nuts.  Stub axle is not original though I have a new one on the way from Aichner.
7. Additional front hub parts including new carrier and slotted nut, new bearing, etc.

Seat:

1. New 3-gutter Drilastic repro seat top with repro Drilastic rear tag, attached to the original frame with carriage bolts (though they can be undone and replaced with something more original-looking)
2. original, single-sprung seat assembly
3. Original spring broke…replacements are available from Hommes or Aichner, but for the time being the assembly is using an adapted BMW R51-style spring fit into the original assembly.

Frames:

1. The bike is currently assembled on an early K500 frame I now know to have been repaired. The repair made fitting some of the parts difficult, but the arrangement is usable. This frame includes the proper, original sidecar mounting attachments which can be transferred to the replacement frame. Also includes new driver foot pegs with rubbers, original passenger foot pegs (which actually stay in the upright position), hexagonal driver foot peg mount (stays in place), proper kickstand, proper footbrake assembly, etc.
2. Currently used frame has the Zundapp logo plates used on civilian bikes (the one where the marque badge is on that swoopy shape)
3. A replacement frame, believed to be a K500 frame, comes with the project. It does not have the dual seat spring brackets expected on a K500, but rather the holes in the seating area for the KS600’s single-sprung seat assembly, so I’m not sure of its lineage. Frame is absolutely solid and unbent.
4. Included are all parts to finish the replacement frame, including a new battery plate, new rear stand brackets (the KS600 type which uses the rear wheel stand as the rear fender stays), new headset bearings

Additional parts:
I have a bunch of additional parts that go with this bike…many are new, some good originals. The list below mentions some that I may have briefly listed above…in general the description above focused on the bike as it’s currently assembled, and the list below the additional parts:

1. K500 engine and transmission – I have purchased this from another Zundapp enthusiast in CA but have yet to ship it to myself. This is from the same bike that yielded the replacement frame and excellent final drive…so not only could it be in the same good condition, it’s the matching engine for the replacement frame (same number).
2. Second final drive – from a K500 – basically ready to use and in excellent condition…threads on housing are intact, bearings tight and smooth and in the proper original configuration. The only issue is that one of the worm gear teeth has a small piece taken out of it. The majority of the tooth is present, though, and BMW & Zundapp enthusiasts I asked (including Vech) indicated that it can be used without worries).
3. Replacement frame – likely from a K500 (and partially described above).
4. Above mentioned parts to make the K500 frame ready to accept all the KS600 parts
5. New, complete rear fender (the one on the bike is the slightly dented original)
6. Set of 4 additional transmission drive chains
7. Second set of wheels – good, usable originals
8. Additional front hub, slotted nut and new bearing
9. Original Noris generator (possibly with electronic 6V regulator from Hommes, if I don’t use it for something else) and original, damaged stator. Gen housing should work, but the stator was chewed up when my condenser cam loose inside the housing the first time I ran the engine. Includes a new set of Ribe mounting bolts, stator draw screw and new points.
10. Second KS600 gas tank (in addition to the one in the bike)
11. New kick starter gear for the transmission
12. Possibly some additional driveshaft parts
13. Original ignition switch preassembled with a high/low beam switch
14. Altered front engine cover
15. Probably more smaller parts…basically you’d get everything I have. I’m looking to divest myself completely.