top speed

  1. Sitherus

    GT5 No torque Low Speed

    My engine is a GT5 Stinger with a Jakes head and a ported cylinder body. I'm running a yz700 exhaust and a boost bottle. I also have an rt carburetor and an SBP shift kit, with an HD freewheel. My Bike frame is a Felt Vintage Iron Bolt, with a sealed gas tank. Im using the recommended NGK spark...
  2. C

    Where did I go wrong?

    Hi y'all, new to the forum thing in general, I've got a 2 stroke grubee Skyhawk that I rebuild mostly with a Chinese clone. The clone I ran for about 30 miles but decided it would be better for parts considering the head and cylinder were one piece (ofc the seller online didn't show that). And...
  3. T

    Not reaching top speed

    Recently my friend and I both bought 66cc flying horse motors and put them on micargi panteras. He has a 90 degree billet and a speed nt carb and I have the stock nt carb and billet. We both recently tested our top speeds. My bike reached 23 miles per hour and his reached 37. Do y'all think that...
  4. C

    48cc power mods

    hey guys, im eventually looking to get my 48cc bike up to 55 mph to make it capable of in-city highways, as I have a long way to go to achieve this im gonna tell u all what ive done so far and plan to do so u guys can tell me if I missed something, I have a 48cc silverjet with a ghetto air...
  5. A

    My engine has lost some power

    Hi everybody my name is Aaron, and I am new to this forum. My problem I'm currently having is with my 48cc mega motors engine I bought from bikeberry. I built this bike about a year ago and have put 1500++ miles on it and it has ran great the whole time, but as of recently i have lost some...
  6. R

    Won't idle - feels so weak

    49cc 2 stroke I've been breaking in my motor and am on the third gallon and just switched from 20:1 to 28:1 off an empty tank. The bike was running great for 20 minutes and got me to the store. Started the bike again upon leaving the store, but now it- -won't idle (at all) -takes forever...
  7. L

    Looking for help with some simple upgrade tips.

    I currently am running a motorizebike with the standard 80cc motor kit. I think these things are awesome wish i had one growing up as a kid. I currently dont have a car and I drive my bike 14 miles to get to school some days and its taking way to long at 18-22 mph 30+ would be awesome. I weigh...
  8. T

    Maintenance?...how to get a higher top speed?

    hi, i bought my 80cc bikeberry kit about two years ago, and still have original everything except rear wheels. i was wondering if there was some sort of maintenance i should be preforming after this long. Because i havent done anything more then fill the tank and grease the chain. The motor is...