What is maximum one time trip distance before engine damage occurs?

Discussion in 'General Questions' started by JimmyKnax, Mar 15, 2009.

  1. JimmyKnax

    JimmyKnax New Member

    I'm looking to add a 3.3 gal harley sportster tank for my "80 cc" Japanese 2 stroke so that I can go on a 100 mile trip without refueling. My only concern is that the engine might not be made for those type of distances. Is anyone aware of an average distance one should not exceed in order to preserve the engine? Any help would be greatly appreciated. Thanks!

  2. bamabikeguy

    bamabikeguy Active Member

    Hey Jimmy,

    I can't speak for that large a Japanese unit, who makes it?

    I've used the 25cc Zenoahs and now the 33cc Tanakas, and think the whole trick is in properly breaking in the cylinder/rings on the first 4-5 tanks of fuel. If you use good gas, never forget to mix the oil, and vary the throttle speeds at the onset, by the time you get to 200 miles, you can feel pretty secure that the engine is getting "bombproofed".

    It won't be the engine that lets you down, usually. 250 miles per day is pretty standard on long cross country runs, 100 miles is a piece of cake.
  3. arceeguy

    arceeguy Active Member

    As long as the carb is jetted properly, and you aren't revving the tar out of it - I would imagine that your butt would go numb way before you ran out of gas. I would be more concerned with the bicycle frame and engine mounting hardware.

    Make sure everything is snug (without over torquing) and use thread locking compound on everything.

    Happy Trails!
  4. azbill

    azbill Active Member

    personally, I would take a 'bum break' every hour or so
    stretc h the legs and get some circulation happening :):):)
  5. AlexRSS8

    AlexRSS8 Member

    Good luck mate, taken it on a 100 mile run yet?
    Last edited: Mar 15, 2009
  6. Simon_A

    Simon_A Member

    100Miles is fine. Done more than that on my HT in a days ride. And thats pretty much WOT riding too.
  7. Skyliner70cc

    Skyliner70cc Active Member

    Distance would bge limited by how far you have to go before an oil change. You are changing your oil regularly, aren't you?
  8. cooltoy

    cooltoy Member

    As long as you cool out on the throttle when it gets hot and cruise, I'd say you could run for days. It's not like the engine has a watch or ever knows how long it's been running. I myself go out for all day runs and notice a loss of power on really hot days.
  9. Mountainman

    Mountainman Active Member

    the truth nothing but the truth

    only then -- after noticing slight loss of power -- usually in hot wheather
    do we need to take it slower -- cool down period maybe

    as we ride those motor bike things
  10. Pablo

    Pablo Motored Bikes Sponsor

    Don't follow. As mentioned, properly jetted, with a good oil at a proper ratio you should be able to go hundreds and hundreds of miles on a Chinese engine, let alone a "Japanese" engine. 100 miles will be a piece of cake.
  11. my engines changes its own oil,lol(2-stroke) and i wouldnt take my bike on a 100 mile trip unless i carried a extra motor kit with me plus tools.
  12. Skyliner70cc

    Skyliner70cc Active Member

    I would take my HT anywhere and would not hesitate to take it on a long trip. I've only had one fail on me out of many built and that was my fault when I overrevved the heck out of it going down hill :)