Author Topic: Just For Fun - Name That Malfunction! (Read 1089 times)

Nopick · « **on:** January 23, 2013, 09:34:40 pm »

Take a look and name the malfunction at the end. Nope, didn't miss a gear.

Dezsled · « **Reply #1 on:** January 23, 2013, 09:40:53 pm »

Lose a chain?

Stpltn250r · « **Reply #2 on:** January 23, 2013, 09:43:36 pm »

ignition(wire come loose, plug wire, plug broke, cdi went out, stator went out)
fuel(carb, fuel ran out, fuel shut off)
motor(basket gear came apart and locked up motor, skirt came loose and locked up motor)

beats me, what happened

QuadMan8 · « **Reply #3 on:** January 23, 2013, 10:06:36 pm »

you hit the gas followed by the kill switch

??

2smoker · « **Reply #4 on:** January 23, 2013, 10:10:00 pm »

wow stpltn that should just about cover all the different scenarios right there!

Dezsled · « **Reply #5 on:** January 23, 2013, 10:11:09 pm »

What's the prize?

GrkGuy · « **Reply #6 on:** January 23, 2013, 10:25:06 pm »

reed boot ripped? sounded like it reved up before it shut down, didnt look like he hit the gas either.

Mitch Keller · « **Reply #7 on:** January 23, 2013, 10:55:43 pm »

Quote from: Stpltn250r on January 23, 2013, 09:43:36 pm

ignition(wire come loose, plug wire, plug broke, cdi went out, stator went out)
fuel(carb, fuel ran out, fuel shut off)
motor(basket gear came apart and locked up motor, skirt came loose and locked up motor)
beats me, what happened

I agree ran out of gas.

Nopick · « **Reply #8 on:** January 24, 2013, 05:00:29 am »

Alright. I thought I would post this because it had never happened to me before. The engine revved and I killed it. At the bottom of the hill, I started it again after checking throttle movement, obvious air leaks, etc. Same thing, engine revved to the moon and the kill switch wouldn't stop it. Had to grab brakes and dump the clutch to kill it.

The main jet came off the needle jet allowing the needle jet to move up in the throttle bore. I assume that was holding the slide up a bit causing the rev. Can anyone say disassemble a carb at Lizard Hill?

GrkGuy · « **Reply #9 on:** January 24, 2013, 06:59:16 am »

ok so who wins,

Nopick · « **Reply #10 on:** January 24, 2013, 07:09:34 am »

Pretty sure my Dad won. He didn't have to tow me back to camp!

MotorGeek - Jerry Hall · « **Reply #11 on:** January 24, 2013, 07:43:21 am »

Quote from: Nopick on January 24, 2013, 05:00:29 am

Alright. I thought I would post this because it had never happened to me before. The engine revved and I killed it. At the bottom of the hill, I started it again after checking throttle movement, obvious air leaks, etc. Same thing, engine revved to the moon and the kill switch wouldn't stop it. Had to grab brakes and dump the clutch to kill it.

The main jet came off the needle jet allowing the needle jet to move up in the throttle bore. I assume that was holding the slide up a bit causing the rev. Can anyone say disassemble a carb at Lizard Hill?

The engine was experiencing detonation as you were going up the hill at partial throttle. I kept saying to myself to stop the engine or change throttle positions before you burn a hole in the middle of the piston. The engine had that horrible lean sound with run-away preignition just before you killed the engine.

As the needle jet moved up, it had the same end result on the mixture as leaning the clip on the needle. If the needle jet moves up 1/8" it would have the same result as moving the clip about 5 notches.

GrkGuy · « **Reply #12 on:** January 24, 2013, 07:48:28 am »

thank god for dads...

Nopick · « **Reply #13 on:** January 24, 2013, 08:46:45 am »

Quote from: MotorGeek on January 24, 2013, 07:43:21 am

Quote from: Nopick on January 24, 2013, 05:00:29 am
Alright. I thought I would post this because it had never happened to me before. The engine revved and I killed it. At the bottom of the hill, I started it again after checking throttle movement, obvious air leaks, etc. Same thing, engine revved to the moon and the kill switch wouldn't stop it. Had to grab brakes and dump the clutch to kill it.

The main jet came off the needle jet allowing the needle jet to move up in the throttle bore. I assume that was holding the slide up a bit causing the rev. Can anyone say disassemble a carb at Lizard Hill?

The engine was experiencing detonation as you were going up the hill at partial throttle. I kept saying to myself to stop the engine or change throttle positions before you burn a hole in the middle of the piston. The engine had that horrible lean sound with run-away preignition just before you killed the engine.

As the need jet moved up, it had the same end result on the mixture as leaning the clip on the needle. If the needle jet moves up 1/8" it would have the same result as moving the clip about 5 notches.

I guess I don't know what detonation sounds like. Is it detonating in this run as well?

MotorGeek - Jerry Hall · « **Reply #14 on:** January 24, 2013, 10:06:27 pm »

No it is not detonating or trying to hurt itself because your were running most of the hill at wide open throttle. In the other video it sounded like you were running the engine at high RPM but at about 1/4 throttle opening and running very lean.

Coasting down the hill with the clutch pulled in, is hard on the throw out bearing and clutch plates.

Guys think that they are cooling there engine by coasting down the hill with the engine idling. The water pump is not pumping much water at an idle. You are primarily cooling the water that is in the radiator but not taking much heat out of the engine to put into cool radiator. You have to move alot of water through the engine to move the heat into the radiator.

LT500Kid · « **Reply #15 on:** January 25, 2013, 06:48:21 am »

I think we found our winner!!!

Nopick · « **Reply #16 on:** January 25, 2013, 09:49:26 am »

Ok. Thanks. I suppose the clutch will have to suffer now and then because I am not going to run down a hill like that under power. :-)

Stpltn250r · « **Reply #17 on:** January 25, 2013, 01:14:01 pm »

Put it in high gear and let it coast down hill. Just hit the brakes now and again.

GrkGuy · « **Reply #18 on:** January 27, 2013, 09:27:02 am »

i never knew that was bad for a clutch, good info right there.
thanks Jerry

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Author Topic: Just For Fun - Name That Malfunction! (Read 1089 times)

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