Dead Left rear Cylinder

[ragtop69gs]

I swapped wires on the coil and still had a dead left cyl. Does anyone have any pointers on how to drop the rear cyl. coil packs so I can check the wiring. Is there a test that will tell if the ignitor is toast?

[Marcarl]

Did you check for spark on the end of the wire, or is the cylinder just not firing. To check for spark, attach a used plug on the end of the wire, lay it on the engine, crank the engine and see if it sparks.

[ragtop69gs]

Did you check for spark on the end of the wire, or is the cylinder just not firing. To check for spark, attach a used plug on the end of the wire, lay it on the engine, crank the engine and see if it sparks.

 

I did, even put a new cap on the wire and cleaned the resistor and spring in the other caps.

[ragtop69gs]

I went back and re-checked, pulled the plug cap, inserted a nail into the plug wire and have a good blue spark, replaced the cap, put a spark plug in it, again a good spark. Put cap back on plug in the cylinder and it still doesn't light the fire (cold exh. pipe)

[Marcarl]

I went back and re-checked, pulled the plug cap, inserted a nail into the plug wire and have a good blue spark, replaced the cap, put a spark plug in it, again a good spark. Put cap back on plug in the cylinder and it still doesn't light the fire (cold exh. pipe)

Now it seems to me that you have a fuel problem, so while the bike is running, spray some WD40 into the intake for that cylinder, if you notice a difference then you have a non-functioning carb.

[ragtop69gs]

After all this BS I rechecked the plug gap on the new plug and it was too small, re-gapped it to .035 and it seems to have been it ! The cylinder fires now and the pipe is getting hot, BUT, it doesn't heat up as fast as the other three ! What's up wit dat?

[Marcarl]

After all this BS I rechecked the plug gap on the new plug and it was too small, re-gapped it to .035 and it seems to have been it ! The cylinder fires now and the pipe is getting hot, BUT, it doesn't heat up as fast as the other three ! What's up wit dat?

Now it needs a good dose of Seafoam, seems that one carb may still have a little issue, or you might need to do a carb sync, might help as well.

[ragtop69gs]

Now it needs a good dose of Seafoam, seems that one carb may still have a little issue, or you might need to do a carb sync, might help as well.

 

Carb sync and float levels were just done 3 weeks ago. Carbs are clean. It get seafoam every 3rd tank or so.

[Yammer Dan]

Little time and Sea-Foam. Give it a chance to catch up. A new plug might help in that cylinder.

[gunboat]

try a can of bg 44k, i also use seafoam but every couple of months i'll pour in a can of bg 44k. reguards

don c.