Cylinder drop out. 750/1100 swap.

[kipthewolf]

Hello,

So a little background info on this problem is where I will start. I purchased this bike right off the bat with a charging problem, did some testing and both the stator and regualtor were bad, so I have replaced both of those. From the moment I purchased it, it has been spewing black smoke which from what I understand is unburnt fuel. When I picked up the bike I looked at a plug and it was fouled really bad. Brushed it off because it kinda ran with them like that and only had a few blips. this bike has pod filters on it (Oh boy!) and a yosh 4-1 race exhaust.

So on to the problem...I was riding this evening and everything was doing well, out of nowhere I lost what felt to be two cylinders, wouldn't idle let alone run till you hit a high RPM then it got its power back. I was wondering if there was anyone that has had this happen before. I would like to add if anyone had some jet size suggestions too, I'm living at 5,280ft elivation with those mods. I havent gotten into the carbs yet, but I'm sure is coming up really soon.

Thank you for reading!

[GateKeeper]

why post the same question twice, once is enough, and it will be easier to answer you, and for you to keep track of those answers

you really should delete one of the posts

.

[kipthewolf]

why post the same question twice, once is enough, and it will be easier to answer you, and for you to keep track of those answers

you really should delete one of the posts

.

Did it because I wasn't sure where it should go. Advise was taken..

[7981GS]

2-valve or 4-valve?
Year and model of bike? Engine?

Eric

[MisterCinders]

Which two cylinders are dropping? If the pairing is right (1/4 or 2/3), you could have a bad coil.