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XS400 top speed??

Discussion in 'The Garage' started by Vloukole, Nov 4, 2013.

  1. bcware

    bcware Well-read Top Contributor

    These engines are pretty noisy up top normally. You can run at 65 mph in top gear all day. The most I have done is 400 miles in a single day. It took way more than an hour :bike:
  2. arfstrom

    arfstrom XS400 Guru Top Contributor

    Are you 2 still on the OEM sprocket set? Its a minor upgrade, buts its worth it. 17t front sprocket. Some where there is a thread here, where we have talked about the values of the 16t to 17t. (t=teeth)
  3. graydonfisher

    graydonfisher 1977 XS400 Candy Blue

    Mine is still accelerating hard at 70mph. I am sure it would easily reach 100mph, however, I have factory standard gearing, so rpm's would possibly exceed the red line with a risk of destroying the engine ( I am 6' 2" and weigh 196 pounds).
    Last edited: May 10, 2019
  4. arfstrom

    arfstrom XS400 Guru Top Contributor

    My max was only 83-85 downhill. I had stock rear wheel gear (i forget) and the 17 sproket front.

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