Check all wiring connections and especially those on the battery, starter, and starter solenoid(if seperare from battery). It sounds like something is just making a bad connection since it won't even turn over- I bet your problem is in this area, good Luck and if I've been helpful please click the green button to let me know, Habe A Great Day!
Can be a loose / bad connection somewhere in the high current starter circuit, or a flat battery.
Did it start ok a few times when you put in the new battery?
Yes >> not charging the battery (or not charged when fitted).
No >> Bad connection between battery and frame or between battery and main ignition key power connection point (usually to a fuse).
The cause of solenoid clicking is the voltage dropping dramatically when the starter current begins to flow, usually a flat battery or a loose or dirty connection in the starter current circuit (will generate heat when clicking which can help you find it).
Your first option is to check the basics.
Is there fuel in the tank? Yes, I know that sounds silly but I have done it!
Check that the fuel lines all the way from the tank aren't blocked.
Is there a fuel tap, (petcock), fitted? They usually have a gauze filter built into them that might need cleaning.
Is the fuel filter a new one?
When was the last time the carb was overhauled?
Hi, Pete you may have squeaked your top end this is commonly known as "HEAT SEIZE" the piston heats up expands and becomes extremely tight in the cylinder bore and usually occurs mainly on 2 cycle engines right after a fresh top end rebuild, but it can also happen to brand new motorcycles, these are rare instances due to better quality control and education. Overheating failures that cause pistons to seize are many and each one should be carefully diagnosed to prevent future repeat offenders and the usual suspects are:
1. Lack of lubrication due to low or no oil.
2. Among the causes of lack of cylinder, lubrication is clogging of lubricator by dirt or waste, obstruction in oil pipes/lines, leaky check valves, leaky pump packing, broken oil pipe/line, oil too cold to feed.
3. Wrong type of oil used in premix or oil tank.
4. Improper premix ratio you should start with 32:1 as a baseline.
5. New rebuild piston to cylinder tolerances set up too tight.
6. Failure to follow proper break-in procedures with a 16:1 premix ratio.
7. Loose fasteners causing intake, base, or head gaskets to leak or blown crankshaft seal, failure caused by age, overheating or walking.
8. Holes in the intake manifold bent or warped intake flange or reed cage any stray air coming into a cylinder will cause a super lean condition.
9. Improper assembly of reed valve gaskets.
10. Insufficient warm-up time for temperature conditions before WOT.
11. Broken, pinched or cracked fuel line.
12. Carburetor fuel passages clogged or restricted from stale fuel varnish, ethanol sludge, dirt, rust, or fuel level in float bowl too low.
13. Main jet size too small or partially clogged
14. Air filter improperly installed, missing or not sealing.
15. Faulty or improperly adjusted oil pump and or cable.
16. Failure to bleed oil pump after a rebuild/replacement or running oil tank dry.
17. Engine coolant level too low, too old, or improper mixture ratio.
18. Radiator clogged, fins damaged, or faulty cap.
19. No liquid circulation due to failed oil or water pump.
20. Cavitation due to air in oil or coolant system.
21. Water and oil mix due to a blown head gasket.
22. Timing retarded due to faulty CKP sensor or CDI.
23. Improper spark plug heat range (too hot) and or gap.
24. Excessive engine load, brakes dragging, clutch slipping, transmission lubricant level too low or viscosity to high.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day. Kymco ZX50 SC10 motor build AF16 clone 49ccScoot com Scooter Forums 50cc KICKSTARTER PROBLEMS AND SOLUTIONS KYMCO ZX Service Manual Fever 1 50 ZX50 KCA SA10AL Kymco Scooter Parts Racing Planet USA KYMCO ZX 50 User Manual
Hi, Graeme the vast majority of service, parts fiche, and owners manuals on the internet are "FREE" to download and all service manuals contain wiring diagrams in the back pages. The rest usually charge a modest fee of $15 and there is a handful of obscure, rare, obsolete, and very old models that are no longer or never were available and some were never printed in English. The Indian and Philippine markets are usually in E-book format only, for these rare occasions I shall look on eBay and find the cheapest one available. Most of the manuals will cover your exact make, model, and year otherwise one will be provided that comes as close as possible to your bike and will have most of the same info that an exact manual would have. If there is no $ sign after the manual link it is free to download.
To download your manual for viewing or printing please click on the blue links below. Good luck and have a wonderful day KYMCO ZX SCOUT 50 Service Manual Kymco Scooter Parts ATVs Scooter Parts Performance Scooter Parts... KYMCO ZX 50 User Manual Kymco ZX 50 2006 Kymco Wikipedia
the sump plug will be on the bottom of the engine but theseold Honda copy (GY) engines don't use an oil filter they have a wire mesh gauze screen that sits on top of the sump plug bolt so make sure this comes out with the sump plug and is free from any dirt/debris. so drain oil clean the gauze screen then refit and refill your oil. check your oil level if its low or black and burnt this could be your over heating problem but I would also check to make sure the auto choke isn't sticking on. Best of luck hope this is of some help