HT Horsepower?

Discussion in '2-Stroke Engines' started by Drunkskunk, Feb 12, 2010.

  1. Drunkskunk

    Drunkskunk Member

    This is probably a silly question, but how much power do these little things make?

    I have 2 "80"cc motors. one from local vendor years ago (never ran) and another from spookytooth. the first claimed 6hp (???) and Spookytooth's has a lable listing 2.75hp, I'm assuming thats peak.

    So what do these things make for actual, usable power? What kind of power is available at cruising speed?

  2. arceeguy

    arceeguy Active Member

    This is a tough one.....

    Less than 5 and more than 1.5 would be my guess. :D
  3. Dilly Bar Rob

    Dilly Bar Rob Member

    Interesting question, I would also be interested in what a "stock" 80 makes... I don't trust the numbers the manufactures state at all...

    Back in europe I used to ride an old czech "Jawa Pionyr" 50cc scooter (1970's comunist era model) - points ignition, 9.2:1 CR, 30:1 gas/oil ratio, carb looked a bit bigger then a HT's, declared power 2.6kW @ 6500rpm. Top speed was round 60 km/h, but I recall you could do around 70 down a long hill with crazy vibes (solid mounted engine...). The thing was a 3 speed & would actually haul two people.

    My PK80 HT with a 44T on a 26" wheel "feels" about the same power/speedwise as the old scooter did in 2'nd gear - IMHO not bad at all considering it's a "toy" motor :)
  4. give me vtec

    give me vtec Active Member

    I feel confident to say 2.0 - 2.5 hp...
  5. arceeguy

    arceeguy Active Member

    Aha - found it.

    Someone dynoed a 50cc HT and got 2.2HP, so I'm guessing that 2.5 reasonable for a 66cc (80cc) engine.

    The dyno sheet
  6. Drunkskunk

    Drunkskunk Member

    That Dyno result is interesting. if thats at the rear wheel, then it puts Spookytooth's claim into the "plausable" range for power at the crankshaft.