I have a Kazuma 50 quad that my daughter rides. Over the weekend she was riding it and i removed the screw to give her more power. She would ride at times at full throttle and never shift. The quad has been flawless since we bought it 1.5 years ago. After the 3rd or 4th trip of the day of her riding around camp she parked the bike. We went out about one hour later to start it and it would not start. I have checked for spark which is good, sprayed starting fluid into the carb and cannot seem to get it started. Could there be some internal part that may have let go? Any help would be appreciated.

 

Does it turn over easily with no funny noises? What gear was she in while she was revving it? These need valve adjustments after the first month then every nine or so months after. If she was revving it high without shifting a valve may have come loose. Are you getting fuel? You can check for compression to see if it has any.

 

I had a similar problem with my son's 50. He rode it the same way, wide open and never shifted gears. I battled my hard starting problems for about 2 months, until the folks here got me fixed up. Exact same symptoms as you describe, wouldn't even start with starting fluid, but I had good fire at the plug. I could get it started by pull starting it around the yard. Anyway's turned out to be a tight intake valve, which was fairly easily adjusted. Do a search on this forum for "carb woes" and my issues are well documented.

Here is the quick lowdown on adjusting valves. It is also document in the operator's manual.

Here you go, a crash course in valve adjustment:

1. pull out spark plug

2. on left side of engine, take out big screw & on top the case take out the small screw, where the big screw was you can get a socket in there to turn the motor over, in the small screw if you look in there with a flashlight you will see some markings, you want to turn the motor over until you either see 2 parallel lines or 2 of these 00... this is theory should be top dead center of the piston, you can stick a screwdriver in the plug hole to see if you can feel the top of the piston.

3. take off the valve covver bolts, silver bolts one on top & one on the bottom of the head, you will see the rocker arms there, you can turn that engine over & see how they work, you want to be sure when its at top dead center that the valves are both closed, so turn the engine over with the socket to be sure they are not open...the rocker valve will move & push the valve, it should not be pushed in, should be all the way out... otherwise you are on the wrong stroke, then turn the motor over again to get it at the top again.

4. Get a feeler gauge & have the .004 piece out.... stick this in between the valve part & the rocker, ajust the rocker until you feel a little resistence & can pull & push the feeler gauge in & out of that opening.

5. Be sure to tighten the locknut back on the rocker so it doesn't do this to you again

6. Do the other valve, exact same way

7. Replace all the covers & screws & put a new plug in the engine (I just do this out of habit, its up to you if you want a new plug or not)

8. Cross your fingers & hit the start button

9. Write us back & let us know if that worked.

Hope that works for you, any small Honda Clymer book will tell you how to do this also & probally alot better than I can... I'm no writer heh.

 

yep, the valves need adjustment, our's did the same thing once, no matter how hard you try its just not going to start without adjusting the valves first

 

 

Thank you for your reply. It turns over easily and sounds just like it always has. She was running in 1st gear at the time. I am getting fuel. The only way i have checked for compression was to put my finger over the spark plug port. It sucks and blows my finger. The pressure is not allot but i am sure with the short stroke of the motor it is not going to be much. Do you know what normal compression should be ?

 

Thanks JD4020. I am going to try this hopefully this evening and i will definitley let you know the outcome. Appreciate the reply.
Howie

 

It worked! I adjusted the valves put the covers back on and hit the button and it fired right up. I am so thankful for all of your help with this. You guys saved me allot of money.I was going to buy a new one for my daughter. I appreciate your time and your input. Once again the motorcycle community comes togethor to help another out.
Howie

 

I just had the same problem today. Got home from the Dunes, unloaded it and it won't start, I am going to check the valves. Keeping my fingers crossed!!

 

IT WORKED!! Adjusted both valves and it fired right up. JD4020 I followed your instructions and they worked great!! Thanks a million!!