Misfire on rear cylinder?

[gotasportster wantbigga]

Bike has developed a stutter when pulling away and feels underpowered. I removed rear plug lead and revs drop a little, replace rear lead and remove front lead and the bike cuts out. Took plugs out, both correct colour, swapped them around but problem remains on rear cylinder. Getting a good spark on both leads, checked on block, any ideas folks?

2000 X reg, 883/1200 hugger , stage one, screaming eagle 2 pipes, screaming eagle plugs, fsh.

[jbs-shovel]

Hi,

Just another quick check to do: try swapping leads over as you did with plugs, and try same thing again. Also use both connections on coil for each test.
If still same you might have to get compression checked on rear cylinder.

[Tiz]

Had this on mine too , turned out to be one of the coil cables under the tsank was shorting against the frame. It will mean removing the tank and checking all the cables routed there for chafing

[banquo]

My TC88 runs on one cylinder when I forget to drain the carb before winter storage. After a while, the other cylinder picks up. I put it down to gum build up in the float bowl/jets, so maybe worthwhile pulling the bowl, and taking a look. No idea why itshould choose to run fine on one, and not the other, when there's only one carburettor, but it does.

[gotasportster wantbigga]

thanks for the help and keep it coming, found it arcing under the tank, cheers Tiz, took a photo, if it loads, am I right in thinking it`s the ht lead for the rear pot? photo taken from offside of bike looking rearwards. it arcs where it touches the head, the fat part of the cable if that makes sense.