Anybody know about Chinese Hua Sheng F142 49cc 4 stroke engine

Discussion in '4-Stroke Engines' started by Irish John, Mar 23, 2008.

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  1. Irish John

    Irish John Guest

    I want to know if anyone has had lengthy experience with the Chinese Hua Sheng F142 49cc 4 stroke engine because I am getting one and I need to know if it vastly inferior to the Honda GXH 50 or nearly as good or even better than.
    I really don't want to waste a lot of time installing it if it is engineered like the HT motor.
    I'd be grateful for any feedback.

  2. nsideus

    nsideus Guest

    I have around 3,000 miles on mine.
  3. Irish John

    Irish John Guest

    Thanks, is that 3000 of trouble free running?
  4. nsideus

    nsideus Guest

    I replaced the diaphragm in the up draft carb a couple of days ago. Other than that the engine has performed well. I bought this engine for the purpose of beating it up I wanted to see how good they were. I have heard reports of valves being tight when purchased a minor adjustment. I run synthetic oil. I think the fact these are copies of the Honda gives them a little more reliability than if they were straight Chinese design.
  5. Irish John

    Irish John Guest

    I think your right nsideous. I've done 1100 kms now and it is a very nice motor. It has none of the quality fade that the HTs had and I'm very pleased with it. Pity it can't pull up hills like the 70cc HT - my legs ache with the pedalling but on the flat it flies. My estimation is that a 50 - 52 tooth sprocket would suit it best. The 56T is too slow. The 44T was totally hopeless on hills but lightening on the flat 63 km\hr I got without trying too hard. Now I have a 48T cos that's all I've got but very slightly larger would be better on hills. even the 56T wasn't that good on hills - the 70cc HT with a 44T pulled much better. Swings and roundabouts I guess.
  6. Proboscis

    Proboscis Guest

    I've been using the 44t sprocket and...

    woodruff key slot chipped on the output shaft.
    I knew not to use the 44t on this F142/ JLgearbox combo but the engine held up great!

    After tearing the "JL gearbox" off, I couldn't believe how quiet the F142 was still. All this time I was thinking the valve lash was way off.

    Time to replace the output shaft :)
    Last edited by a moderator: May 25, 2008
  7. Esteban

    Esteban Active Member

    Take more pix of that 1959 !!!
  8. cruiser66

    cruiser66 Guest

    Got mine last August. No problems at all. Runs good and I have not done any tweaking or adjusting of anything. The factory valve lash was the same as for the Honda GXH50 so I figured it would be OK. A nice quiet smooth little engine with no oil leaks.

  9. Proboscis

    Proboscis Guest

    Well all three of my 59 chevys aren't worth taking pics of :grin: (work in progress) all in junk mode.
  10. Irish John

    Irish John Guest

    If you want to talk about games I'm sure there is another forum on the web but this thread is not the place for discussing it. This thread has a subject and without wishing to offend you Ikky the subject isn't about games. Please try to respect the rules of the forum and it we can all find out more about motored bike issues.
    Last edited by a moderator: Jun 17, 2008
  11. bubbatgs

    bubbatgs Member


    I have about 12,000 miles on my bicycle!!! I have had problems with keeping brakes on it and I have broke two primary drive gears! no problems with the motor though!!! I have been running synthetic oil too!
  12. mmachine

    mmachine Member


    About the synthetic oil, which brand are you using and at what intervals are you changing the oil. Congrats on the 12K miles, impressive.
  13. Irish John

    Irish John Guest

    Have you been running synthetic oil in the gearbox? Is that why you broke 2 primary gears/ If the engine needed synthetic oil surely it would state that in the handbook. I know that my motor likes the 10/30 oil that is specified.
  14. bubbatgs

    bubbatgs Member

    No, I broke the primary drive gear because I had a problem with a bent rear sproket! This enabled the chain to try to jump off the primary drive gear. As soon as the chain jumped, the bolt would break! This is why I had this peroblem!!!
  15. Irish John

    Irish John Guest

    I do not understand what you mean by the primary drive gear. Are you in fact referring to the 11T freewheel sprocket that goes on the end of the final drive shaft? There are 3 gear wheels - the first has the clutch bell housing attached, the second is the middle gear with 2 gearwheels and the third is the one on the final drive shaft that engages with the engager.
  16. bubbatgs

    bubbatgs Member

    But of course!!!!The primary drive gear is the 11 tooth sproket on the out put shaft of the transmission!! The transmission has a centerfical clucxh with a drive housing that rides on a race. The other two gears inside the transmission are called the intermetiate and final drive gears!
    I other words there is no;primary drive gear with-in the transmission! I have had a problem with one clutch housing!!! I lost some teeth on it and the small gear on the intermediate shaft!
    My repair was to order new cluch and intermediate shaft (with gears) I then went out and bought some shimming material. (.001-.003 tho. stainless!) and removed all but .005 end play on the intermediate shaft. Then I filed the cluch housing race until it was within .002 of sinching the housing down. I have since ran sae 90 weight lucas gear oil with a mixtuer of stop leak in it! (it will never stop leaking though)I had the problem when I was using grease. I would wash the bike and I guess I filled the transmission up with water, thus destroying the gears. I have had no problem since I covered the fill location with a thick rubber boot. (I cut up a thick innertube to create the boot. just like on the stick shift of a car!)
  17. response to OP

    Hi Irish John, I run the Honda (like you) and the HS, both in Brand X setups (we are not allowed to use our name here). The little HS is a VERY good engine, so much like the Honda that it was cloned from, that it could fool you even at close look, and a good ride.

  18. Irish John

    Irish John Guest

    Hi Mike, I am allowed to use the EZM name - so you run the HS & the Honda with the EZM gearbox? I suppose you made the honda one specially for yourself because I understand that they aren't available yet. I also understand that they may never be available in Oz until God knows when.
    I'm really more interested in buying a GB that will fit the Honda.
    The power difference between the HS & the Honda is noticeable but the HS is indeed a good engine except the valves rattle and that is annoying though harmless. With a Grubee GB the HS isn't strong enough to pull the Schwinn Deluxe 7 which is a lovely bike with springer forks & front V-brakes but is steel and heavy. The Honda will pull it. That's using a 48T sprocket. I wouldn't use anything larger and I would never use the 56T. I have a 50T but haven't bothered trying it. That may well allow the HS to pull the Schwinn D7 up hills OK but I'm strictly a 48T man.
    Because the EZM looses less power through the belt driven GB it would pull the D7 nicely I'm sure with a 48T sprocket.
    The Grubee G4 kits arrive here in a month. The GB isn't very pretty but it may well be an improvemnt on the old Mark2 GB.
    Please try and prioritise getting your product to Australia because Australians are great contributors to MBc and deserve special consideration.:grin5:
  19. Irish John

    Irish John Guest

    Bubbatgs, your problems sound most unusual and more akin to a Hoot GB owner. Now that you have a rubber boot to keep water out of your GB I recommend you ditch the 90W/stop leak lube & go back to lithium grease. The heavy oil even when stiff as honey just causes the GB to get very hot and the clutch slips something terrible. It also smells really nasty.
    The most sensible solution to your problem would be to stop using a pressure hose on the engine and clean it with a kerosene soaked rag & toothbrush.
    Those grubee clutch bells wear on the bushing and get considerable lateral play but I haven't broken any teeth yet. I reckon the first gear wheel & clutch bell needs replacing after 10,000 kms because of wear on the bushing. The bushing needs replacing too probably. Drilling the 9 holes in the clutch has helped my bike a lot. Cheetah has a thread on it in the 4stroke section.
  20. fetor56

    fetor56 Guest

    The way i understand things the Grubee G4's are going to be here WELL in advance of any standalone EZM tranny.Pity cos that means customers that don't know & are not prepared to wait are probably going to accept second best,& thereafter won't be looking.
    Important also is $'s cos Grubee stuff sells at a realistic price here....inflated but realistic.