2014 Massimo MSU 400 idles perfect, runs ok up to half speed. From half speed if you step down on the gas pedal all the way engine dies. Engine is fuel injected, the map sensor, and the throttle body idle control sensor, and the fuel injector have been replaced. Also the fuel pump was removed and fuel pressure is ok, and fuel was checked for water. Air box and air filter have been cleaned, also replaced spark plug. From a dead stop if you step right down on the gas pedal all the way it dies, if you baby it, and go easy it will run ok until about half throttle, then after that it will die as you start to push down more on the throttle for top speed. Any ideas? I appreciate anyone's help...
A few pictures (so far) of the engine work - eventually I will share wiring info and other details (if anyone is interested?) should anyone else ever need to swap an engine in one of these. The replacement engine is a Harbor freight $750 special 670cc, (lawn mower/industrial type lump) with a few minor upgrades. Should have it back together soon, bolted in. The cold weather slows me down!
What is the Kawasaki engine model number for the side by sides listed below. I had an older Ute with the 401cc Kawasaki FJ 400D, but it had a carburetor, and a flywheel magneto ignition system.
This new 401cc engine with EFI, and electronic ignition looks like a big improvement over the old. But, I can’t find the Kawasaki engine model number?
Kawasaki 401 cc (24.47 cu. in.) single cylinder, 4-stroke, gas
Bore x Stroke: 3.23x2.99 in
Compression Ratio: 8.6:1
Maximum Torque: 21.4 lb-ft @ 2400 rpm
Valve Train: Single-Cylinder OHV
Engine Vibration: Internal Counter Rotating Balance Shaft
Fuel System: Closed-loop electronic fuel injection
Horsepower (KW): 13.5 hp
Electrical System: Starter/Generator — Solid State Regulator
(Note: Some versions/listings state: "Alternator Output (max)22.9 amp")
Lubrication: Pressurized Oil System
Oil Filter: Spin-On (Item#: 49065-7010)
Cooling System: Air Cooled
Ignition System: Electronic Inductive Spark
Air Cleaner: Replaceable Dry Cartridge (item #: 11013-7029)
Utility vehicles/side by sides that use this engine:
2021MULE SX™ 4x4 FI
2020 E-Z-GO Express™ S4 Elite Gas
Cushman Shuttle 4 EFI Gas
Cushman Hauler 1200
By Mike Turner
American SportWorks LM 650 won’t start at times. Starter won’t engage the solenoid just “clicks” much like a weak battery would cause. Battery was replaced and problem went away and then came back. Replaced positive battery terminal. Problem resolved then returned. Replaced negative battery terminal. Problem gone then returned. Replaced the positive and negative battery cable ends. Problem resolved and now returned. The repair lasts for maybe 12 starts, then the solenoid just “clicks” again as it will with a weak battery. So I replaced the ignition switch. Problem solved for a week. With each “fix” the problem is resolved but only temporarily. Does anyone have any suggestions ? To replace the starter is expensive especially if it’s not the problem.