Water damage...?

MrLarkins

HS Math Teacher
Jun 17, 2008
487
0
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45
Arkansas
I went through some rain...the motor quit on me

the next day , I found water (very little) in here..

now i can't get the motor started again... oh it cranks, but won't turn over on its own

suggestions??
 

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Dave31

Active Member
Mar 1, 2008
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38
Aztlán, Arizona
I ride in the rain all the time....well as much as it rains in the desert..
I use RTV around the cover and the rubber seal for the wire's.

Have you checked for spark? Try to dry it out...I got mine wet one time and sprayed with WD-40. Dried it out and it fired right up.
 

Ilikeabikea

Active Member
Jan 27, 2008
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Ptown, Texas
You could pull the cover off and put a light bulb right underneath it. That would evaporate any moisture. Or like fair said WD-40 will do the trick too. Those are both old tricks from back in the old distributor days..........................
 

Dave31

Active Member
Mar 1, 2008
11,204
29
38
Aztlán, Arizona
i'll try the WD40...
how do I check for spark?
You could pull your plug out and hold it next to your motor and crank the motor. But that's hard to do with these bike's.

I use a Spark plug tester...Pull your plug out so the motor will crank easier
It can be picked up at any local auto parts store. Or you can make one using a spark plug and aligator clips. Just solder the aligator clip to the plug.




You could also make one like Norman's....http://motorbicycling.com/f4/tester-ignition-207.html
 

Pablo

Master Bike Builder & Forum Sponsor
Dec 28, 2007
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Duvall, WA PNW
www.sickbikeparts.com
I would suspect your kill switch or external connections first.....good tips from the other fellas....

Lemme tell you, I try not to get rain in my knickers but other than that my engine gets pretty wet without issues....if I let rain completely keep me from riding, I would go whack.
 

MrLarkins

HS Math Teacher
Jun 17, 2008
487
0
0
45
Arkansas
hmm, ok, I'm not as worried now

well, I took the head off and just rolled the bike....I didn't see any spark
 
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Bikeguy Joe

Godfather of Motorized Bicycles
Jan 8, 2008
11,843
237
63
up north now
Got a question about that....I tested three of my mags. Two show 0.00 when I touch the flywheel and the mag coil, the other measures 0.04. I checked because I though the one coil was touching the rotor, but one I KNOW has a gap, and it's the other one that reads 0.00

Do you have mag/coil/readings somewhere?
 

Pablo

Master Bike Builder & Forum Sponsor
Dec 28, 2007
3,665
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Duvall, WA PNW
www.sickbikeparts.com
Got a question about that....I tested three of my mags. Two show 0.00 when I touch the flywheel and the mag coil, the other measures 0.04. I checked because I though the one coil was touching the rotor, but one I KNOW has a gap, and it's the other one that reads 0.00

Do you have mag/coil/readings somewhere?
In a thread somewhere...here post #9.. http://motorbicycling.com/f4/loss-high-rpm-spark-519.html

I am not understanding what wires you are talking about.
 

MrLarkins

HS Math Teacher
Jun 17, 2008
487
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45
Arkansas
i borrowed my neighbors meter.

inside magneto
[1] i touched the blue and the white wire and got 1.5
[2] i touched the blue and the black and got 1.5
[3] (with the kill switch ground disconnected) i touched the white and black and got 2.2

then,
[4] i touched inside the plug cap and the black and got 7.3
[5] i touched inside the plug cap and the white and got 7.3
[6] i touched inside the plug cap and the blue and got 1.5

then with spark plug in cap but laying on top of cylinder head, i rolled the bicycle forward and there was no spark.

no spark...

?
 

MrLarkins

HS Math Teacher
Jun 17, 2008
487
0
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45
Arkansas
with the spark plug in its cap, I layed it on the top of the engine (thus completing the loop), then i rolled the bike and saw no spark

if its the coil, how am I getting a charge on the blue/white, blue/black, and white/black combinations?
 

Pablo

Master Bike Builder & Forum Sponsor
Dec 28, 2007
3,665
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38
Duvall, WA PNW
www.sickbikeparts.com
i borrowed my neighbors meter.

inside magneto
[1] i touched the blue and the white wire and got 1.5 This sounds incorrect, it should be 350 ohms
[2] i touched the blue and the black and got 1.5 NG it should be 350 ohms
[3] (with the kill switch ground disconnected) i touched the white and black and got 2.2 sounds right

then,
[4] i touched inside the plug cap and the black and got 7.3sb about 2K okms
[5] i touched inside the plug cap and the white and got 7.3????
[6] i touched inside the plug cap and the blue and got 1.5 sb a very high resistance in one direction, essentially open in the other (diode)

then with spark plug in cap but laying on top of cylinder head, i rolled the bicycle forward and there was no spark.

no spark...

?
See above....have you tried taking the coil pack out and drying it/WD -40/compressed air?
 
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MrLarkins

HS Math Teacher
Jun 17, 2008
487
0
0
45
Arkansas
yes, i have dried and WD40'd it

I will recheck the numbers later and will take picks to back it up....i got to go to VBS and be "Spiderman"..