What is the safe running distance of these engines?

Discussion in '2-Stroke Engines' started by Waxxumus, Jun 24, 2015.

  1. Waxxumus

    Waxxumus Member

    I have about a 15 mile commute to work. 30 miles round trip.
    In this situation, would it be necessary to stop the engine for periods to rest, then restart and run again after about say 20 minutes?
    Or are these engines fully capable of going 15 miles after break in without a problem?

  2. crassius

    crassius Well-Known Member

    I find it takes 6 to 8 miles to get those huge crank cheeks up to a stable operating temp. My run-in trips are usually about 16 miles to get a new engine working well before delivery to customer.

    You should have no problems with 15 miles.
  3. Waxxumus

    Waxxumus Member

    Then on a ride we shall go.
  4. troyg

    troyg Member

    I don't know what engines you're talking about, but the quality rackmounts will run 8hrs straight easy, plenty of 200 mile-in-a-day trips here.
  5. Timbone

    Timbone Active Member

    For a HT 2 stroke, you should be getting a minimum of 90 mpg. Full 2.5L tanks should take you a minimum of 50 miles. My 25 mile round trip commute only requires about a quart of fuel.
  6. butre

    butre Well-Known Member

    they're air cooled, run them as long as you like. as long as you're moving they'll never overheat
  7. Waxxumus

    Waxxumus Member

    Well, I ended up running it for awhile yesterday. Went about an hour and a half on it.
    Turns out I had a tiny leak in my fuel line that was causing leaking fuel and an air leak. Fixed that, now she runs with a bit more pep. Back wheel appears to be beginning to bow inwards. Aah cheap spokes :( almost time to get that cnc milled sprocket and new rims. Wonder how many miles after 400 i can ride on this funky rim.
  8. crassius

    crassius Well-Known Member

    depends on whether you own a spoke wrench
  9. Waxxumus

    Waxxumus Member

    i shall buy one.
  10. The_Aleman

    The_Aleman Active Member

    Overheating is one thing, catastrophic failure is another. Chinagirls aren't really designed for all-day operation under heavy load.
    They are primitive low-compression engines with always-questionable build quality that seem to be happiest below 6K RPM.

    As soon as yet another motorcyclist-in-denial starts hopping them up, raising the compression and other mods, the chances for engine failure greatly increase.

    Early "instructions" that came with chinagirl kits used to state "do not run for more than 30 minutes at a time".
    (That may have been a blessing in disguise because many of those older kits would rattle your teeth out within 30 minutes!)

    If one is looking for a reliable engine that can run all day long under load, the first place to look is at industrial/commercial engines.
    Engines made by companies like Tanaka, Robin-Subaru, Honda and clones like Lifan and Huasheng - these engines will typically run as long as you want them to.
  11. skyash

    skyash Active Member

    my friend did try to blow his up but no. reving wot on the spot for 10 min may be more got really hot thats all i ride 30km a day 5 days a week and at 30kmh to 60kmh all day if i like good oil and there fine .till you get a piston to the face .but i wll push my luck .till then . my chopper got so hot it wood burn my but then i have to stand up and ride and back off so it wood cool down but that chopper is like 100kg bike .
  12. troyg

    troyg Member

    Your question is hard to read, punctuation and spelling goes a long way.RPM matters, don't go over the engines powerband, and gear for that, then you should be able to do all day rides.
  13. Fabian

    Fabian Well-Known Member

    I typically get 2,500 miles out of a top end on these engines, and the bottom end is good for 6,000 miles if using 25:1 oil fuel ratio, and not over revving the engine.
  14. HeadSmess

    HeadSmess Well-Known Member

    you cant run fast enough and theres no point anyway, theyll still hunt you down, sniff you out and get you somehow.

    pulled off 100Mile+ non stop rides before, using a few litres of fuel at a go...