Technical Information Pages for the restoration of Zündapp KS 750 and BMW R75
Monthly available on our webseite.
© 2012 h-p hommes
All participating heavy military bikes on the trip.
In April 2012 we made a several days off road trip in the Flinders Ranges.
The Flinders Ranges are a nature park in the dusty outback about approx. 600 km north of Adeleide.
Our host- a sheep farmer - provided his simple but pleasantly equipped shearers quarters for our stay.
His farm has more than 450 square km and he still has approx. 4000
When he speaks of the severe drought he speaks about a period of 18 years. Then in 2009 a huge rain drowned the country.
Then after that until today – 2012 - there was no real rain again.
The landscape is barren, mountainous, traversed by wide waterless river valleys and very dusty.
As there is not such a large amount of Zündapp KS 750 and BMW R75 in
Australia all other military bikes were welcome as well.
Because we deal with technical problems on this website we would like to have a closer look at the encountered problems during the trip and analyze them in detail.
Dave with his BMW R12
Because the slopes we drove gave our bikes a permanent good shaking our R12 driver Dave lost a lot of his bike while driving. The last day his front axle turned itself so far out that the wheel jumped out of the brake drum. A better tightening of the screws and some Locetide would have prevented some of the forced breaks.
Kent changes his magneto
According to tradition Kent
with his BMW R75 began the round of small repairs and replacements.
Ich drove a BMW R75 from my friend Ian. When I took it over I already recognized that changing gears from high range to low range was not possible. It felt as if the inner lever jumped out of the switch. But this was not tragic because I could drive very well in high range all the days.
But the last day I ended up at fairly high speed on some very bumpy
gravel track which transferred a few very heavy hits on the gear.
Ian with his BMW R75
The third R75 from Ian had the same problem as Kent’s R75. The old magneto did not deliver any spark at high temperatures due to missing magnetism. We also exchanged his magneto the first day against a completely overhauled one. After that things went well for Ian and its R75 as it should be.
Zündapp KS 750
There were three KS 750 participating on this trip.
Manfred with his Zündapp KS 750
Manfred had restored his bike here in Australia. He had changed it to slide bearing shells and put in our new deaxial pistons.
He had renewed everything without compromise.
Kerry und Paul with their Zündapp KS 750
Paul had bought his bike in Germany six month ago. Engine, transmission and differential were completely overhauled in our workshop in Kamphausen.
It was his first major trip with the bike and he had little
They told me that there is a spark but the engine would nevertheless not start.
I turned the throttle grip and with the first powerful kick the engine was running again.
I explained Paul that he had to kick more powerful because I had seen before how timidly he used the kick start lever.
Then I check the new spark plugs Paul had mounted.
The distance was 0.6 mm.
Peter withn his Zündapp KS 750
Peter Kunze had rebuilt his
KS 750 engine with a pressed crank shaft and tatra pistons.
It frustrated him to see that the two other KS 750s with their slide bearing shells and the modern deaxial pistons ran smoothly and when controlling the oil level only showed a small consumption and their oil was clean whereas the oil of his KS 750 had a black colour.
Sure I was pleased to see that my two KS engines clearly showed to be superior in this comparison.
There were also some other heavy military bikes.
Russel with a heavy military bike type „special version Far East“
Martin‘s Pseudo R71
Martin drove Peter Kunze’s solo bikes BSA and the camouflaged R71.
All in all it was a great trip with good friends in a dusty but very interesting landscape in Australia’s outback.
Spare parts + Accessories + Repair for Engines,
Transmissions, etc. of
Spare parts + Accessories + Repair