no highway speeds

  1. sdhadley94

    Mikuni bs34 constant velocity.

    On my 81 xs400 special, I have 2 factory mikuni carbs. Thing is, it was running rich but still managed to score the plugs as if it were lean and rich. Cruising speed was a no problem. But anything over 35-40mph at around 1/8 to 3/4 throttle seemed like the bike had to catch it's breath before...
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