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  1. RadlagerMike

    XS250 - 360cc barrel change

    The first Series of the 250 Motor Block are able to put directly the one from the 400 ccm on it, later types need to be spindled up From outside view the is no chance to check that without dismounting the cylinder bank
  2. RadlagerMike

    Carburetor advice sought please and am I the only Brit?

    Did you check this with break cleaner ? From my experiance bogging over 7000 RPM means not enouph fuel, you can see that also that right spark looks much more in the directoin to white check the hole fuel line beginning on the tank where the fuel has been taken in (air must replace the fuel...
  3. RadlagerMike

    Carburetor advice sought please and am I the only Brit?

    Did you check this with break cleaner ? From my experiance bogging over 7000 RPM means not enouph fuel, you can see that also that right spark looks much more in the directoin to white check the hole fuel line beginning on the tank where the fuel has been taken in (air must replace the fuel...
  4. RadlagerMike

    1978 Yamaha XS400 full tune up

    this looks like from the model after 1779, he has the older one with a mix up with the coils only the newer bikes with the cdi have this connectors, the older ones have round ones
  5. RadlagerMike

    Wiring diagram

    A3 or zwo picture for printing on A4
  6. RadlagerMike

    Searching for an out of Order Product from Rotrex

    Dear all, i am searching for an product from rotrex which has been taken away from their catalog I am searching for an right way turning super charger Rotrex C8 for 650 ccm https://www.rotrex-deutschland.de/cmsdaten/images/pdf/rotrex%20technical%20datasheet%20c8%20range%20v2.01.pdf...
  7. RadlagerMike

    1978 Yamaha XS400 full tune up

    if it fits the holding screws you can use anything which has between 4 and 5 Ohm mostly the part where the spark cable is taking to inside, there the spark cable inside is brocken, so only the cable not the complet peace is damaged you can feel it from outside the spark cable, it feels like...
  8. RadlagerMike

    1978 Yamaha XS400 full tune up

    as you wrote, right side has been exchanged in the with something not original
  9. RadlagerMike

    Supercharging

    In the past there was a small one from Rotrex the C8 nearly 600ccm left or right turning and very small but they put it out of their catalog https://rotrex.com/
  10. RadlagerMike

    Do you know Stephen Mitchell and the Patent of the Mitchell Construction ?

    it was that type of engine but the small one, the XS 250 i am searching for people from 1981 who know more of it ore someone from NRDC who can deliver paper or whatever how it was done to get more basics for an rebuild
  11. RadlagerMike

    Do you know Stephen Mitchell and the Patent of the Mitchell Construction ?

    For now translation is missing
  12. RadlagerMike

    New Member from North Germany

    Hello to all I am Mike, 63 year old guy, having Bike`s of Yamaha (most of them under construction) SR500, XT500 and my favorite one, the XS250 from 1978 I saw that ther are more users with the small Bike in the Area of England than in Germany Aktual counts in Germany 2024 are:
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