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Search found 4 matches

by stefr100
Sun Apr 28, 2024 2:26 pm
Forum: Antique (1923-1945) Motorcycles
Topic: R71 hot start problem
Replies: 10
Views: 2485

Re: R71 hot start problem

Update after some further troubleshooting. It ended up being the coil ánd condensator. New coils seem not to withstand the heat under the cover. I could find a NOS Bosch TJ6/1 which should hold it. Also installed a new MIFLEX 220nF condensator. Motor is running fine now, and starts when hot. Still h...
by stefr100
Mon Apr 08, 2024 4:39 pm
Forum: Antique (1923-1945) Motorcycles
Topic: R71 hot start problem
Replies: 10
Views: 2485

Re: R71 hot start problem

Your coil had a short. Condenser was not causing that problem. Sounds like you found the problem. Todd Hi Todd, I don’t believe it’s the coil. I now already tried 3 new coils, two different brands, always the same problem. They get too hot, and when cooled down, work again. I now have to find out w...
by stefr100
Sat Apr 06, 2024 3:30 pm
Forum: Antique (1923-1945) Motorcycles
Topic: R71 hot start problem
Replies: 10
Views: 2485

Re: R71 hot start problem

Did some further testing today. Installed a brand new coil (PVL #12 13 8 030 025). Did a 20 min ride. After shut down, could restart the bike with first kick. Five min later, start at first kick. Another 10 min later, not possible to start anymore… Checked the plugs, as good as no spark. Took off th...
by stefr100
Sat Mar 16, 2024 11:13 am
Forum: Antique (1923-1945) Motorcycles
Topic: R71 hot start problem
Replies: 10
Views: 2485

R71 hot start problem

Hello, I recently acquired a restored 1938 R71 and it gives me a real headache to start when hot. When cold, it starts with the first kick, always. (spät, trickle the carbs, no throttle). It idles fine, goes well in all load conditions. When after a ride you stop the motor, and immediately start aga...