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Discussion Starter #1 (Edited)
I finally picked up a fuel injector pump pressure test kit from harbor Freight. I may need some extra fuel line to make the right connections, but need to know if I hook the pressure tester directly to the fuel pump line and check the pressure it primes the engine at, or do I rig it inline so I can get the pressure with the engine running? Last time I checked the volume of fuel flow I had about 9 oz. Of fuel flow in 10 seconds. Thanks.
It is this kit:
 

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The service manual lists an adapter so the gauge is "T"'d between the fuel pump and the fuel rail.

However, the manual also states to turn the ignition "ON", not start the bike. Turning the ignition ON would run the pump for a few seconds.

Just dead heading the fuel pump discharge to the gauge should give you almost identical readings since the bike is not running. And it is a lot easier to hook up.
 

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Discussion Starter #3
Right! I'll try that first. If the manual says to test with the engine off it should work. Otherwise I'll get some fuel line and high pressure clamps to put the "T" connector in my kit in in place of the hose that runs between the pump output and fuel rail input. That will give me a "T" connection as well.
 

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Right! I'll try that first. If the manual says to test with the engine off it should work. Otherwise I'll get some fuel line and high pressure clamps to put the "T" connector in my kit in in place of the hose that runs between the pump output and fuel rail input. That will give me a "T" connection as well.
This is exactly how I did it, put the T in and check the system pressure. I have the same kit too it's pretty handy to have.
 

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Discussion Starter #6
I tested straight from the pump, and it immediately primed to 46 psi according to this have, then slowly started dropping. I couldn't detect any fuel leaks, do I'm assuming it back flows some into the tank. I'll go get some fuel line and do the T connection with it running and report back. Thanks.
 

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Discussion Starter #8
I made the T fitting and tried again with the engine running. The Locktite threadlocker for gas did not seal the threads, so I was forced to use white Teflon tape, which held for this application. Pressure held at 46 psi, and here is a vid that may help, as you can hear the engine as well. Sound quality isn't the best from my cell pho
 

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Discussion Starter #11
The performance is poor again!! I have had the Set valve set to wide open and disconnected from the ECU for a little while. Since then, I tried disconnecting the O2 sensor by the CAT. I reported that the bike seemed to run much better with it disconnected. I then tried soaking the O2 sensor overnight in a mixture of gas and carb cleaner. The next day I blew it off with air, and once I was satisfied it was dry, reinstalled the O2 sensor. Bike ran like crap again, no better than before, so I once again unplugged the O2 sensor. This time, the bike is not running better with the O2 sensor unplugged. 🤔
When I start the bike it smells and sounds a little like it is running rich. When I rev the bike up, it still sounds like it is restricted or drowning from being way too rich? There is very little smoke from the exhaust, it looks normal. Is there a way to make the bike run a little leaner to see if the air/fuel mixture is what is causing the poor acceleration? This is really getting confusing and annoying! I'll even give out my phone number if someone thinks they can be of more help talking in person.
Thanks.
 

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Discussion Starter #12
Since the bike was not running as well this time with the oxygen sensor disconnected I decided to try plugging it back in again. This time, the bike is running better than it was with the oxygen sensor unplugged. I don't know why. I'll have to try again tomorrow to see if the bike is consistent. It's still not quite as good as it was the last time I had the oxygen sensor unplugged. kind of confusing.
 

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Is the o2 sensor dirty, you could try pulling it and cleaning it, they make a spray. All your sensors talk to each other threw the wires too the ecm. Check all your plugs for loose/dirty connections if a sensors working and the ecm does not know it bc it’s getting a bad signal then it’s not talking correctly, and the machine will act irrationally.
 
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