Triumphrat

Kem770

My 6T is only running on cylinder #2. Cylinder #1 has spark and cool air coming out the exhaust. Does this sound like a valve problem?

Kem

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Kem770

Anyone? I want to ride it and not just look at it.

Kem

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Mr.Pete

If cyl 1 has compression,just replace the spark plug.
If it doesn't have compression,check the valve clearances and make sure the valves are moving up and down and not sticking when you turn the engine.
If the valves seem OK and there's still no compresssion,take off the head and look for a hole in the piston.

Kem770

Thanks MrPete.

Kem

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Kem770

I'm perplexed because the spark is great, I watched the valves move while the engine was running and it has enough compression to blow my finger off the spark plug hole.

The bike sounds like it's misfiring, so could this be a timing issue?

Kem

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jimballard

I'd change the spark plug........simple fix if it's the problem. You could also check for a holed piston with a small flashlight shined down the plug hole; but it sure sounds like an electrical problem. Also, when the engine's running, it still might generate enough compression to move your finger off the hole, but not enough to fire the cylinder properly.
Just the $.02 worth from the "village idiot": Jim

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Jim Ballard

The older I get, the faster I was....until lately!! (Speed IS the fountain of youth)!

obollox

Swap the plugs

Kem770

I have swapped the plugs twice.

Kem

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Kem770

What plugs are the best replacement for the discontinued Champion L10? It currently has Champion L82C plugs.

Kem

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A man cannot be comfortable without his own approval.
Mark Twain

Ohio-Rider

Are you using points or EI? Getting a good spark doesn't mean much if it sparks at the wrong time.