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    RD400 whats wrong With my transmission ?

    Hey So finally have the motor running. I guess the crank seals will show themselves if they feel like it, but it is running. And shifting. The little bit of adjustment, and cleaning has sure helped. I really appreciate your time, as i am quite unfamiliar with these particular bikes, i wanted...
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    RD400 whats wrong With my transmission ?

    I agree. But it was shifting fine once in position, just would not engage the drum pins. my guess is the cam neeeds some help from the vibrations and new oil, to self align. Will keep you posted once its running
  3. S

    RD400 whats wrong With my transmission ?

    Hey there. Was caught up with a few work things for the past week or so. Made some progress. I feel like since there was a Significant amount of sludge in the motor, and not having moved in a decade, things were sticky and seem less sticky now. removing the detent plunger probably helped along...
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    RD400 whats wrong With my transmission ?

    Thank for the detailed reply. I am not offended in any way at all, and do i appreciate the detailed reply and your time. i have the sprocket side off already, its covered in crud and soaking. I will clean and take that cover off as well and inspect. my understanding is that the shifter cam...
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    RD400 whats wrong With my transmission ?

    To be more specific; Gear meshing is not the issue, but being able to rotate the shift drum is the problem. The pawls just dont contact the pins right. Once they do, it shifts fine. Which is why this issue is baffling me a little, and i dont know enough about yammy trannys, to know if there...
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    RD400 whats wrong With my transmission ?

    Hi thanks for the reply, i appreciate it. May be i didnt give complete information, i apologize. I do indeed know that motorcycle trannys do not have synchro gears, and shafts need to be turning to engage shifts. The output and primary shafts are turned by hand while shifting, and it does...
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    RD400 whats wrong With my transmission ?

    Its a 77 RD400, unknown history, 10k miles, pretty decent shape and all there. Engines never been apart etc I mostly work on 4 strokes, i have worked on xs400. Carb service, tune etc I have rebuilt over a dozen motors and all running strong, ( i still have the bikes and ride them ) Early...
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    RD400 whats wrong With my transmission ?

    Hello all New guy here. i have been trying to post this on aircooled club, but something is up with their registration process i think. Since rd400’s shifting linkage is very similar to xs400, i am hoping someone can help me out. I’d appreciate the help.
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