Loss of one cylinder

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Pluggy:
Just in case the plug wire is bad.... If that parts bike coil has the cables attached, you can install those along with the coil.

TrapperAH1G:
Thanks, already used the plug wire on the parts bike to see if it helped, no joy.  Not expecting the coil to be it, think it's the carb.

HayHauler:
Quote from: TrapperAH1G on July 21, 2025, 08:05:13 PM

Thanks, already used the plug wire on the parts bike to see if it helped, no joy.  Not expecting the coil to be it, think it's the carb.

Following this.

Hay  8)
Jimmyt

98valk:
 dielectric grease on the plug connection? should be none

Mooskee:
Quote from: TrapperAH1G on July 03, 2025, 08:12:51 PM

Update:  NO real improvement.  Been using B12, even used Lucas cleaner & Seafoam.  There is no change to idle when I remove the plub wire, BUT, get it to 2000 rpm and there's a noticeable change in sound and a drop in rpm when the wire is removed.  Truly seems just the lower rpm's are involved.  So, if the slow jet is clear, any opinions on what would be the cause?

Thanks.

It sounds like a slow circuit blockage. You seem to have cleared it partially by cleaning the jet. The B12 in time may clean it up.

There is also a possibility of a blockage in the pilot circuit. Using a proper "D" shaped tool for Honda pilot jets, turn the pilot on the offending cylinder 1/2 turn open (CCW). Run the bike and try to get fuel moving through the circuit. If it clears, then set the pilot needle back 1/2 turn in. It is worth a try. You may not get everything out, but the B12 may do the rest.

You can buy a Motion Pro adjusting socket for about 12 bucks. I put it in a 1/4 drive socket. I actually have a flat spot ground on the socket as a reference when adjusting. Amazon has them.

You may need to pull the intake riser off the offending cylinder to get to the pilot easier. If so, stuff a rag in the intake so you don't drop anything into the cylinder.

Of course if you have the appropriate long handled adjuster you can just open the pilot 1/2 turn with it much easier.

Hope this is helpful.

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