A pressure test is insufficient. You need a flow test.
Fuel flow is a function of power being made so the gearing is not important. If you are at the same rpm/throttle position the horsepower and fuel flow are about the same. Now using WOT in 1st can difficult not only for control (keeping the wheel down) but also that you'll hit red line very quickly.Somebody correct me if I'm wrong, but isn't it true that the bike would not require as much fuel at wot in first gear as in sixth gear?
It was actually in the garage.I saw John fix a similar problem on the side of the road.
It was a kinked fuel line.
Fuel line doesn't appear to be kinking.. it rotates a little as I lower the tank and doesn't seem to be bending any more than the way its molded..
He said earlier he checked the SET valve.Is that the stock exhaust? Are we sure the SET isn't partially closed? Have you pulled the spark plugs?
It is stock and cables have been removed so valve is constantly open I believe. Haven't pulled spark plugs since I replaced them a few weeks ago, shortly after getting the bike.Is that the stock exhaust? Are we sure the SET isn't partially closed? Have you pulled the spark plugs?
Feels/sounds fine until wot. Spits and sputters when pinned but don't know/think that its misfiring. Could be possible I guess, but I would think I would notice that without going wot..?
I will look at the SET valve again today. It does not have any problem in neutral. Under load at wot is the only time it happens. When riding I can get to redline and speed in all gears as long as I don't roll on the throttle all the way. If I do roll on it too much and it bogs I just let off a hair and it accelerates fine, just not quite as quick as it could if it didn't bog at wot..I'd put an eye on the SET and just be 100% certain.
Can you repeat the behavior in neutral? If so, if you go 50-70% throttle can you get it to the redline without issue? If so, I'd unplug the TPS and put a meter on it and make sure it's reading linear and not going back down near the top end. (FYI, I've seen the secondary TPS on the older bikes which is identical to the primary on your bike exhibit this behavior.)
Also, are we certain the secondary injectors are doing their thing?
I would say it sounds and pulls good right up to when I fully twist the throttle... not necessarily a specific rpm. In the video, yes... but thats just the typical speed and rpm I am at by the time I have the throttle fully open in 2nd gear.Good video and captures just what it is doing.
It sounds and pulls good right up to 6k rpm. At that point it does not sound like one cylinder is a problem but all are not producing more power.
Getting a bit of power back by rolling off the throttle is a pretty classic indicator of a lean mixture issue.
I've always heard that the secondary injectors come into play right around 6k rpm so I wonder if that is the issue?
I've also read, but not checked myself, that you can see the secondary injectors spraying by looking down the throat of the throttle body with the airbox removed.
What do you think @Chuckster? This sounds like a new one to me.