ONE LUNG!

[driftingswiftly]

Hey, my 12R is only firing on one lung. I just got it not too long ago, so I haven't done much wrenching on it. I found the plugs, but they seem SUPER tough to pull. I want to check to see if I am getting spark to both cylinders, but thought I would grab some advice first on the best way to go about squeezing in and removing the plugs. If anyone has any suggestions on what may be the problem (assuming I have strong spark), I'm all ears.

 

[strmvt]

Prolly fouled a plug it's easy to do specially if ya rev it while it's cold front plug is easy to pull just put the socket on if it's a regular plug socket use a wrench on it the rear I HIGHLY recommend going to your local auto parts store and buying a pair of plug wire pliers to pull the plug wre hen use a standard extension and swivel and off they are. I've NEVER fouled a plug when cold tho but I don't rev it I start her up run a few sec's while I gear up helmet/gloves and hop on and go but I don't get on her for a few miles.

 

[dave_xb12r]

Prolly fouled a plug it's easy to do specially if ya rev it while it's cold front plug is easy to pull just put the socket on if it's a regular plug socket use a wrench on it the rear I HIGHLY recommend going to your local auto parts store and buying a pair of plug wire pliers to pull the plug wre hen use a standard extension and swivel and off they are.

Good info, but I think we have another BuellXB record! Longest run on sentence ever!!

 

[strmvt]

ya I always wondered why I flunked grammar classes in school

 

[Devlsmurf]

Same thing happened to me with my brand new XB12r, inside of 300 miles I fouled a plug, changed them out and haven't had a problem since. A short piece of rubber hose is a big help in getting the back plug out, and starting the new plug into the threads.

 

[Buellysses]

When I went to pick up my Uly last spring I had to sit in the dealership for about 2 hours while they changed the plugs. Apparently they fouled out when the drove the bike off the showroom floor. oops.

[up] for the rubber hose trick!

 

[Stevenc150]

..but thought I would grab some advice first on the best way to go about squeezing in and removing the plugs.

The 1st time I changed plugs I followed the service manual taking them out (removing inner air box, etc.) and it sucked. I found an easier way, so I put them back in as described below. Put iridiums in a few days ago, also as below with no prob. It might not be the best or easiest, but it is WAY easier than the manual method.

Two important things. You got big hands, it'll be tight. Also must have a spark plug socket that will hold onto the spark plug, seen cheap ones that didn't.

1) Take off seat, outer airbox cover, and left side air scoop.

2) Pull boot off front cyclinder plug and use 5/8" combo wrench. Don't over-tighten and put the plug boot back on.

3) Pull boot off rear cylinder. Use 5/8" spark plug socket - swivel connector - 6" in. extension - and Ratchet. (The spark plug socket needs to have a rubber "grommet" in the base to hold on to the spark plug.)

4) Stick all this through the space circled in the picture, though it's a little tight, it'll go. It gives you "direct" access to the rear spark plug. Use your left hand to go in behind the frame where the air scoop was and guide the socket onto the plug and remove.

5) Put the new spark plug in using the same method, using the left hand through the air scoop space. Be sure not to cross-thread.

Hope it helps.

 

[driftingswiftly]

Guys guys, THANKS! I had a 5/8" deep socked and an extender that i fit onto a breaker-bar. That assembly reached the back plug fine. With the assistance of your rubber hose idea I was able to finish the job. Thanks guys!