honda z50 won't start? no spark? - Cycle Forums: Motorcycle and Sportbikes Forum
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post #1 of 4 (permalink) Old 01-09-2004, 02:56 AM Thread Starter
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honda z50 won't start? no spark?

HELP! bought my 4yr old son a "91 z50r the other day for a couple hundred. it started several times and ran great when i was checking it. threw it in the backseat of my car (lack of access to a truck) and brought it home which was a 15min drive. now i can't get it to fire up. changed the spark plug allready. i'm not a mechanic by any means so i don't know how the electrical works but all the connections are good. can someone help me? before i bought it i started it 3-4 times over a 30min period and it cranked up with no problem.

you break it and i fix it!
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post #2 of 4 (permalink) Old 01-09-2004, 08:22 AM
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I don't know that engine specifically, but engines need fuel, air, and spark to run.

FUEL:
A 50cc motor is likely a two stroke. Two stroke motors literally burn oil to lubricate the cylinder. That bike either has a gas tank, and a separate two-stroke oil tank, or you have to premix the two-stroke oil into the gas. Make sure you've got fuel in the tank, and the petcock, if it has one, is turned to ON.

SPARK:
Unscrew the spark plug and connect it back to the plug cap. Insert the spark plug between two cylinder head cooling ribs so that the outer ring touches the ribs. Now kick the starter a couple of times and observe the spark. It should be blue and strong.

If you don't get a spark, check all wires for damage, and make sure all connections are solid.

AIR:
Visually inspect the airbox and air filter. The air filter should be reasonably clean.

Start there, and post your results.

-- Chris
2004 BMW R1100s
(previous rides: 2008 R1100R, 2000 Hayabusa, '83 V45 Sabre, '98 Buell S3T, '95 CBR600F3, '83 KTM250)
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post #3 of 4 (permalink) Old 01-09-2004, 06:15 PM
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hayabusafiend said:

FUEL:
A 50cc motor is likely a two stroke.

A z50 should be a four stroke, so no need for pre-mix oil.

Tommy the Cat had many a story to tell.
It was a rare occasion, such as this, that he did.
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post #4 of 4 (permalink) Old 01-10-2004, 06:47 AM Thread Starter
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got it going!!!!! got some parts of the owners manual off a guy on motorush and traced it back to a broken wire on the pulser. re-solered it and have been zipping around the shop thanks for the help! i can't wait to get my boy on it, got him training wheels and all kinds of gear

you break it and i fix it!
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