How many miles are on your happy time?

Discussion in 'General Questions' started by Simonator, Jul 30, 2008.

  1. Simonator

    Simonator Guest

    My current 70cc engine has 1,745 miles on it. I put all those miles on since June 1st. I'm hoping I'll get at least another 2,000 miles out of it. I put 2 pieces of foam in my air filter box for better filteration. I sealed the air filter to the carb with red RTV to prevent any unfiltered air from sneaking in between the cracks. I never ride top speed for very long. I try to cruise at 20-22 MPH most of the time to prolong engine life. My top speed is about 30 MPH with the 44T sprocket. It will be interesting to see how long it lasts.

    EDIT: Forgot to mention that I run my gas/oil mixture at 20:1

    How many miles are on your engine?
    Last edited by a moderator: Jul 30, 2008

  2. alex

    alex Guest

    3,598 miles on a king's 80cc
  3. Simonator

    Simonator Guest

    Not bad! What are your riding habits? do you take it easy like me? Or do you ride balls to the wall all the time?
  4. alex

    alex Guest

    When I am just cruzin around, i will average around 22-25 mph, but when I am on long straight roads, I will go between 29-32mph (36 tooth sprocket).

    I do like to gun it alot, but just for the acceleration.

    I never run it wide open more than 30 seconds.
  5. caddymankc

    caddymankc Guest

    Same here but i probably only have 300 miles or less, but i think the diffrent sprocket would really help i still got the stock big sprocket.
  6. Butch

    Butch Guest

    I have 2200 miles on a Dax 70cc motor. It is mounted on a Schwinn Skyliner and has been run with a 32 tooth sprocket since new. I have had not a single problem with this motor since I got it 3 years ago. Top speed is 35 MPH and normal cruising speed is 25-30 MPH. At 2000 miles I figured the motor was broke in well enough so I switched to Amsoil Dominator synthetic oil mixed 40:1. I haven't noticed any difference in performance since switching to the synthetic oil. I used Briggs and Stratton 2 stroke oil mixed 32:1 for the first 2000 miles.
    Last edited by a moderator: Jul 30, 2008
  7. 220 miles on my Powerking 80cc

    87 octane

    20:1 mix - Amsoil Interceptor - no problems at all. Starts every time.

    Normal speed 20-22mph.

    Once in awhile, I will take it to 30mph for a few seconds - It will do that easy, so once I get some real miles on it, I would be curious to see if it will get to 35mph or higher - again for just a few seconds.

    44 tooth. -I live on steep hills so I need pedal assist to get up the hills at WOT at 22mph.
    May go to a 50 tooth, but I don't want to sacrifice the top speed yet. And w/ the assist, it doesn't really seem to be putting a strain on the engine.

    I would be curious to know if anyone else has an 80cc w/ a 50 tooth, and how that works for you?
    But please answer the primary question for this thread. I don't want to be accused of thread stealing.:grin:

    Kruis'in Style,

    Troy Fitz.

    my Dog: - (still under construction)

    Attached Files:

  8. Simonator

    Simonator Guest

    I used a 50T for a couple weeks. It had good low end power, and climbed hills better. Top speed was 23 MPH. I will be installing it again for the winter.
  9. pedalpower

    pedalpower Member

    50t sprocket

    good to read about the 50 tooth. I just installed a 50 tooth but I have 700c wheels/tires. can't wait til the weekend to begin the running in.
  10. 1608 miles on my Dax 70. 34T sprocket, speeds of 18-35MPH. Until a couple weeks ago, I was commuting 180-220 miles a week since March. Averaged roughly 110mpg so far.

    I ran 16:1 Valvoline 2-stroke for the first 300 miles, then switched to 25:1 Lucas semi-synth. Runs like a champ, but the bike it's bolted to has a frame crack.
  11. TWalker

    TWalker Guest

    I bought my first one 3 years ago from Kings and it is by far the best, smoothest running engine I have ever had. I wished all my engines had been this good. The chinese quality fade has nearly forced me away from using them at all.

    No idea how many miles probably less than 1,000 but it has served me long and well and is getting a sick shifter this week.

    This was the first bike and engine I built.

    Attached Files:

  12. dwsutton

    dwsutton Member

    300 miles and starting my second build.
  13. Skyliner70cc

    Skyliner70cc Active Member

    I'll be honest, a Kingsmotorbike engine was my favorite all time engine. It was indestructible and I abused it a bunch running nitromethane/methanol in it lugging up steep mountain passes for hours at a the point that the exhaust turned cherry head and the head changed color from the heat.

    I put hundreds and hundreds of miles on the bike mainly on offroad trails in very poor conditions. It never skippeda beat. I sold the bike last year and haven't gotten one like it. It was by far the most powerful HT engine I have ever owned to date. Unlike today's engines, I used a standard 44 tooth sprocket to mountain climb. Every motor since then is a 48 or 50 tooth sprocket because they don't have the torque to climb hills at respectable speeds.

    I don't know if Kings even sell's the same type of engine today. I screwed up and bought from almost every other vendor since then because of price and convenience. I wish I had dozens more like it....a powerful bushing engine that I never worried about.
  14. TWalker

    TWalker Guest

    I agree, I think I bought mine while the chinese were still wanting to impress the US market to buy engines.

    I've had some decent ones since but none that had a smooth power band and were indestructible like this one.

    Its a keeper.
  15. dave1490

    dave1490 Guest

    king,s 80
    ported and gasket matched{intake and ex}
    crossover ports cleaned up{deflashed}
    67cc boost bottel
    93 octane, 33 to 1 amsoil,with 15cc,s zmax and fairly high consentration,s of octane boost

    no problem,s at all untill i went to a cheaper oil that i wanted to get rid off then the bushing fell apart.chunks went up the port got lodged in the piston side and took out the cilyinder.
  16. Simonator

    Simonator Guest

    I'm up to 2,982 miles!!
  17. I'm just getting started breaking in my king's 80cc. So far, I'm impressed. Runs great, idles well. I'm breaking in at 16:1. Any reason you wouldn't want to keep it as oily as possible? What would be wrong with running at 16:1 all the time? My plug looks great, and it has reasonable power.

    I think oil is your friend with these things. And keep the rpms down. The buzz is pretty intense on the upper rpm ranges. When it's vibrating, it's tearing itself apart, and cracking your frame.
  18. Simonator

    Simonator Guest

    I don't see any reason why it would hurt anything running it 16:1. I run mine 20:1 all the time.

    I just rolled over 3,000 miles today!
  19. jamesburr36

    jamesburr36 Member

    900 miles on PK 80cc. I ride with wide open throttle about half the time especially on the freeway. Max speed is about 30 mph. I also rode wide open throttle up a 9% grade for about 8 miles at about 15 to 20 mph with some peddle assist when the grade was steeper and at 12 to 15 mph during the pre-300 mile break in period.

    Also I rode between 30 to 60 miles a day during break in.

    Only problem so far is that the muffler broke off at the weld yesterday.. Will take to muffler shop to fix soon.
  20. Milo

    Milo Guest

    I had about 1500 miles on mine(GRUBEE starfire 48CC ROUND HEAD) ,

    engines still good and is now waiting for a new bike. old one couldnt take the strain..heh