acceleration

  1. J

    1 or two teeth smaller rear sprocket consequences

    Hey, thinking about putting a slightly smaller rear sprocket on at one time. I know Formula390 knows this stuff inside and out. Iknow there will be slightly less acceleration, slightly greater fuel economy, and slightly less revs at the same speed. What are the quantitative measurements on...
  2. HardRacing

    BLACKSTONE BST CARBON FIBER WHEELS for RC390 - Sooo Sexy.

    . For those who want super light weight wheels.The ultimate is now available. Black stone Carbon Fiber Wheels.Ultra light weight for faster acceleration, faster braking, and quicker turn in.And of course, they just look sooo Sexy. >> BLACK STONE WHEELS <<
  3. K

    Acceleration Issue

    I just bought my 2015 KTM RC390 last month and it has suddenly developed a strange issue. It will run perfectly fine until I reach the 52-55 mph range then all of the acceleration and engine power drops out until it falls back into the 40 mph range and you can then re-accelerate back up to the...
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