is there anything you can pinpoint that changed about the same time it started misfiring? Does sound like a fuel starvation or intermittent blockage though...
Or could it be running rich and the sputtering is due to plugs fouling which then clear when you rev it? Until they foul again...maybe you can tell something from the state of the plugs. Not sure the air induction solenoid bypass is going to do anything other than complicate the issue, it seems anyway not to be the solution.
If all else fails you can fit an aftermarket lambda sensor and get a readout of air/fuel ratio as you go along..
Thanks for the response!
The main reason I did the solenoid bypass was because when I got the bike it had no fairings and I got a box of parts with it haha. Well after getting the bike started and idled up to temp (with no issues what so ever) I took it for a ride around the neighborhood. 1st gear was ok but low power, 2nd gear got worse and when you hit 3rd it would fall flat on its face and I mean NOTHING
there. So after the normal plugs and fresh fuel did nothing I then went into the carbs which were all pretty much spotless seemed as though someone had been in there recently and the jets were the right ones for the bike. I however, don't know a lot about carbs on bikes so I didn't dive into them too much. Just checked for clean jets, bowls, diaphragms etc... which all looked good.. to me at least!
So after that changed nothing and much more reading I realized that I didn't have any of the parts for the air induction, so after some more ebaying I got the majority of the parts and went for the bypass. BOOM
bike ran like a scolded cat (for the most part) ran it through the gears with seemingly no real issues. I did notice the CCT was bad after that ride so I changed that as well. So on my second real test ride I took it farther out from the house and noticed the sputtering that Im getting now, the bike could be ridden but you were never really sure when a sputter would arrive but you could work past it with some throttle work. So I was thinking the pump couldn't keep up, well a buddy of mine had an amazon one (stock style) brand new in box so we gave that a shot. Took the bike on a 20 mile round trip ride in 70 degree weather and had one or two real small issues with sputtering that could be worked past with a little blip of the throttle, but for the most part it seemed like I had the problem licked. Took it on a few shorter runs around town and a few other places with no real issues again VERY light sputtering here or there but nothing big. Took it for the 20mi trip I spoke of in the first post a couple of days ago which was stop and go and some 55-60mph driving. For the most part I had ZERO issues until about the last 5 minutes it started to sputter lightly again. So for me, I figured the amazon pump just couldn't keep up when hot or in long rides.. changed it with an OEM pump and still.. same issues.
Sorry for the long winded post but I wanted to give as much info as I could, again, today I plan on checking out the spark plugs and probably changing them just to check it off the list. But the ONLY variations I can think of as far as riding goes would be the outside temp and not letting the bike get up to operating temp before riding. I of course would let it warm up, but if my memory serves me correctly.. on both longer rides with no real issues I let it warm ALL THE WAY UP as to where 2 days ago I did not.. it came up in temp some but I started riding before it was fully warmed up... but that couldn't be a the issue could it??