Well, she's about to blow at 2,238 miles

Discussion in 'General Questions' started by Simonator, Aug 12, 2008.

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  1. Simonator

    Simonator Guest

    My happy time is vibrating like crazy and sounds horrible. The first thing I checked was to make sure it was mounted good to the frame. The mounts have came loose and caused excess vibration in the past. Well, it is solid. The bearings must have took a dump already. I have no idea how you guys are getting 6,000 miles out of these chinese junk motors. I didn't even ride mine that hard. I cruised at 20-22 mph with the 44T sprocket, and 23-24 with the 40T. I mixed my fuel 20:1. Oh well. Time to buy another disposable motor.

  2. JE

    JE Guest

    Yep got one summer out of my board tracker with a happy time then saved my penniesfor a while and bought a Whizzer.

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  3. SirJakesus

    SirJakesus Guest

    Maybe its time to upgrade? You've already gone through two of these already when will enough be enough?
  4. Mountainman

    Mountainman Active Member

    Man oh man -- that's not very many miles. I guess that it's all in what we are looking for - I just want to ride and avoid as many break downs as possible - especially the BIG Break Down.. Ride That Thing - Mountainman
  5. dwsutton

    dwsutton Member

    What total miles are typical do you think ?
  6. Mountainman

    Mountainman Active Member

    I'll take a little guess here. If a good engine should run for at least 600 hours - with a fair all around average speed of 15 miles an hour --- 9,000 miles before turning to toast ?? Ride That Thing - Mountainman
  7. machiasmort

    machiasmort Active Member

    Slick 50

    Any of you guys ever slick 50 a motor?

    Seems it would be easy to pull the jug (top end) dump in 1/4 quart, shake arround and spill out excess.

    Somebody had to do it here?
  8. JemmaUK

    JemmaUK Guest

    Actually thats not so bad an idea, although I would add it to the fuel mix myself.

    The key to HT's lasting is simple - building one that is made of decent components. From all the threads on here I think a part that would solve alot of problems is a chrome plated cylinder along with decent studs etc. This would stop the piston slop that these engines get which would mean the bearings would last longer (even high quality bearings will fail if sumbmitted to forces they arent designed for).

    Jemma xx
  9. Simonator

    Simonator Guest

    Believe me, I would LOVE to. The problem is I am broke. If I had $600 laying around, I would get a GEBE. I don't want to pedal everywhere again. So, I am going to have to come up with $100 to purchase another crappy time. I'll try not to ride this one as much. That way I can save up for a quality kit before it blows.
  10. Simonator

    Simonator Guest

    If my all around average speed was 18 mph, I got about 125 hours out of it..... BOOOOOOOOOOOOO!!!! :cry:
  11. SirJakesus

    SirJakesus Guest

    Yeah man that sucks. Could you at least fit a 4 stroker chinese engine in your frame? I haven't heard too many bad things about those with the exception of the JL Hoot gearbox being garbage and the grubee gearbox whining a lot. It's not quite as much as a GEBE or Staton and probably wouldn't last quite as long but it would allow you to keep your moondog frame mounted and should last a good amount of time. I haven't heard anything about those engines vibrating themselves to ****. In fact I may just convert my stingray XL to Grubee 4-stroke since the darn thing vibrates way too much as it is now for my liking and I just don't trust the reliability factor. I think the grubee gearbox can fit on the honda GXH50 too if the chinese clone ever dies.
  12. srdavo

    srdavo Active Member

    I run 48cc happytimes.
    I use 48 or 50 toothed sprockets.
    I run WOT. (i'm guessing...more fuel...more lube)
    26-30 mph.

    I prolly have 6000 miles on one of them. (and still going.....)
  13. Skyliner70cc

    Skyliner70cc Active Member

    Slick 50 won't do anything except decrease the amount of money in your wallet. PFTE (teflon) has long been dispelled as an effective additive in motor oils. It won't do anything to fix or prevent engine damage. Its folks who believe in this bunk that make these shysters millionaires.
  14. Warner

    Warner Member

    I don't know much about these Chinese engines, but from all the reports of huge amounts of vibration, my guess would be that the engines aren't balanced and probably don't have adequate (or ANY) counterbalancing built into the cranks. If that's the case, they'll NEVER last very long - they'd be beating themselves to death from the moment they are started.

  15. SirJakesus

    SirJakesus Guest

    Keeps you buying $150 motors once a year. I'd rather just buy a $250 motor that'll last me 5 years.
  16. Bronzebird

    Bronzebird Member

    My first Chineese motor and project bike

    I instinctivly put some lithographic rubber (5 ply rubber and canvas) to shock absorb vibration on any motor. Ridgid mounts do not make sense on a car or a 2 stroke shaker.
    I keep the heads torqued to 12.5 foot pounds and running Homelite chainsaw oil at the moment 20:1. I've got some ashless Seadoo oil but do not know what is best for longevity. More research i guess...

    Oh, I have one mile on first ride :)
  17. Skyliner70cc

    Skyliner70cc Active Member


    You know what is scary? China actually builds parts for Boeing.
  18. arceeguy

    arceeguy Active Member

    Why not disassemble your current engine and find out what is wrong with it before it "blows up"? Seems to me that replacement parts are readily available online and on eBay.

    The sinophobia on this forum is rampant, and while these bicycle motors may not be the best engineered, nor the highest quality, it doesn't mean that everything produced in China is junk. For example, I am typing this response on a IBM ThinkPad laptop that was made in China. It is three years old and I never had a problem with it. I also own a Chinese made motorcycle (a Honda Trail 70 replica) and it is better than the original they copied. The new version features electric starting, and a larger displacement engine. And at a little more than half the price (but over twice as fast) of a Whizzer NE5, it is a transportation bargain.
  19. Warner

    Warner Member

    The manufacturing capabilities in China are NOT the problem, and they can and DO make some very high quality stuff. The problem is quality control. If Boeing is having parts made there, you can BET that THEY (Boeing) are doing the quality control and will not accept substandard parts. The quality control is the problem, not the manufacturing capabilities in China. But quality control costs money, and many companies farm stuff out to China because it's so much cheaper.....and follow through with that thought by not wanting to pay for adequate quality control. Much of the quality control that I hear about going on with these Chinese kits is happening HERE, either from the few vendors that seem to care or by the people buying this kits after they have received them.


    PS - The Honda trail 70's are the coolest!
    Last edited: Aug 14, 2008
  20. Simonator

    Simonator Guest

    Well, here is my problem. As soon as I pull the motor off, I am back to pedaling everywhere I go :shock: I can't have that! I have been limping it around town. I am not sure what I am going to do. I might try to rebuild my spare motor. I am going to run a better quality oil in my next motor. I been using cheap super tech oil from the Wal-Mart because I am broke.

    Is it true that the 50cc engines tend to last longer than the 70cc?
    Last edited by a moderator: Aug 14, 2008