Hi all,
As some of you know, my beloved was stolen in January and I found it again via the power of Facebook. Since then, I've given it some TLC and replaced the busted parts and gave it new plugs and leads from Harley and did the top rocker gaskets while I was at it.
Today was the maiden voyage, it started out okay . . . . . . It was running slightly odd to start spitting occasionally, but I put that down to low battery voltage and it did seem to improve when it was outside my garage idling.
So began the ride out, all seemed fine but then it started missing a little, then a lot. I thought it was maybe down to the open air box conversion I'd put on sucking in freezing air as its a cold day and maybe a bit of icing up was occurring as I had a car that did similar, however I pulled over to get some heat back in the air box, it improved a little on idle but when I pulled away the misfire was back.
It gradually got worse and worse, at first it cleared on full throttle (eeeeeeeek) but soon reverted back to miss firing farting and popping.
By the time I limped back home it would hardly idle, spitting back on a regular basis so I ended up pushing it home.
Got it back in the garage, hooked up to ecmspy, it shows no faults on the log. I've posted a video on the forums Facebook page, I'm just uploading it to YouTube so will link it, it shows the ecmspy live running data and you can hear how the bike is running.
I've looked around the Internet and found no definitive answer . . ..
I'm stumped - any constructive ideas really welcomed as Facebook has turned in to a bit of a guessing game for everyone which is no help at all.
Thanks in advance.

Normally issues occur when something changes, and the key thing here is the new leads and plugs... Are the leads seated properly?

_________________
08 Specialized Langster

I was so careful to do that and checked that none of it moved when I rotated the motor back in to place, is there a decent way of checking without rotating the motor back out again?

Are the earths all connected and tight?

You don't need to rotate the engine to change the plugs not check the plug caps are on.

Don't believe the alarmist posts on Facebook.

_________________
08 Specialized Langster

http://youtu.be/Cr7SzqiGlE0

Having trouble inbedding the video on my iPad, harrumph.

I guessed the alarmists were alarmists with no true knowledge, I just wondered if there was anything that could be read from the live data as I'm no techno head.

I'll wait till it's all cooled down and have a look over the basics in the morning, still a bit beyond me how you get to the back plug, could do with hiring a pixie to pop in there and take a look

For the rear plug a plug socket, extension bar and universal joint plus ratchet. For the rear plug cap, a pair of these http://www.workshopping.co.uk/product/s ... 0mm/VS867/ so you don't end up pulling on the plug lead cos you'll pull it out of the plug cap

here's a you tube vid showing you how
https://youtu.be/aMeqOE5Jxsg

_________________
Buell Ulysses XB12X 06/08

i saw all the alarmists and i aint got a clue is why i say ride it up to maz, on full throttle of course

recheck all the things you have done , as it was ok before the theft
remember slow & methodical ,might be something as simple as a pushed back connection in a plug
good luck

_________________
Feros Ferio

I had similar problems after rotating the engine. The HD shop eventually traced it to chafed wires in the main loom under the seat. It had probably been chafing for years, and the movement in the loom due to rotating the engine sealed its fate. The damage wasn't visible, but you could see where the seat had been in contact with the loom.

_________________
Wear the fox hat