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Im not really that familiar with the Quest , but the black box, i have never seen anything quite like it. I looked up the electrical components for that Quad and didnt see anything that looked like it. Wonder if it is an add on relay housing of some sort.

All the bike starters use a sprag clutch like that Parham.. Well everything except a harley perhaps..

Thanks Mech! I knew we would get at the RIGHT answer...even at the expense of my ignorance! 🙂

No that's not right Parham.. Not for these bike starters.. They aren't the pre-engaged/solenoid-engaged sort that cars have. If it was working for a while when you first put it back in Cheeta then it's most likely that the ratcheting mechanism inside the cases has played up. There's a ratchet called a "sprag clutch" that rides on the back of the flywheel in the side case and it allows the starter to turn the engine over but once the engine is running it just slips and doesn't turn the starter. If you take the starter out and partly strip it so you have the commutator/shaft and the end housing thatbolts to the engine, you can bolt those two parts in and test it by turning the shaft by hand. It should turn freely one way but the other way it should try to turn the engine.

Yep, solenoid is not engaging...the starter actually has two functions built into it. A solenoid moves the starter gear forward to engage with the engine as the starter motor is spinning. That same solenoid retracts the starter gear when you release the switch so that the engine does not continue to spin the starter. Take it back off and figure out what you did to make the solenoid not work...

Welcome and good wrenching, sounds like a fun project. Its always interesting picking up where others left off.

The King Quad 300 was produced from, 1991-2002 and was the most advanced on the market when introduced. The later ones from 1999-2002 got some upgrades which made them the most sought after, i cant remember exactly what made them stand out, but i think it had something to do with gearing.

It will be a defective rubber hose, the one to that wheel. They swell up inside so that the pressure you apply with the lever is enough to apply the brakes, but the return pressure, which in the case of a drum brake is a spring, and in the case of a disc brake is only the flex of the rubber piston seal, isn't enough to force the fluid back.

It is a drum brake but it has a twin piston caliper, it sounds like the caliper is hanging up, i would pull it off lube it up a bit and see if that helps, the pistons may be sticking also, go ahead and check that out while you have it off, or you could replace it, thats what i did , they are fairly cheap, actually cheaper than the OEM kit, and i really didnt want to mess around rebuilding it.