ONE CYLINDER, HELP?!

[Rush600guy]

So... Acquired a 2010 Polaris Rush Pro R 600 with bad crank, got a 2012 motor sent up here to remote AK. Did the swap, new SPI pistons & one cylinder was bad, compression tested it to 50-90psi, other cyl 120... sent the bad one to Darby's Performance in Fairbanks who returned me a used/honed cylinder @ 100psi. $280 later - Terrible service, no offense to anyone.
Now... my new/bad 100psi cylinder runs and my good 120psi cylinder doesn't... wtf?
all electronics are upgraded except for TPS (waiting on 5v parts to reset) & ECU. adjusted the throttle cable last night, switched fuel relay back n forth, got spark, fuel, oil, and air.
When I start it it idles at 1400rpm +-200, 32*f+ it idles up to 2400rpm and boggs down if I WOT
Any ideas and/or experience would be greatly appreciated, please help.

[NapaMatt]

Did you go with new injectors too??

New fuel filter?

With a "New" Engine ... You should be getting 125psi IN Both Holes!! not 100 in one and 125 in the other.. Not going to run well or long that way

[Rush600guy]

yeah it was a used motor w/ 2k miles. was a lemon, bad cyl, got a $250 refund, switched out my core cyl for remanned (100psi max, called the shop back w no good customer service).
switched from 2010 4 injector to a 2012 dual injector (just cleaned em), new fuel filter SPI, and ECU is 2012.
running 50:1 for motor break in while oil line bubbles clear, gonna try to thin that ratio down with some fresh fuel. Spark plugs new but very wet. might even switch the injectors around just to make sure the dead cylinder doesnt follow, ie bad injector. if injectors are good I would like to say maybe the TPS sensor needs tune?
just odd that my (old) good 120psi cyl is the bad cyl now, and my 100 psi cyl is the current power house.
Any input or ideas?

[Rush600guy]

I'll get a new cyl asap (payday) but when I talked to the shop he said he stands by his product, that its my pistons (brand new). Naw, he overbored it past spec. Anyways, only thing he can do is let me send it back and make me pay the extra $100 for a rechromed 125psi. just sucks cuz I helicoiled my fuel rail inlet and living where I do is expensive to fly a cyl from nome to fairbanks. $30 each way and still takes a week turn around.

[Rush600guy]

Napamatt
funny enough I work there too

[NapaMatt]

haaha

Small World!!

Getting back to 125 psi.. is what u need!!

[NapaMatt]

Also..


Whats ur fuel pressure..

Maybe thats why is was lean in the first place.. and went down.. hmm

[Rush600guy]

Yeah a 125psi cyl would be 100% primal, was my goal but I got shafted and now, naturally I'm skeptical when it comes to his new deal with a re-chrome for $100 more w trade and $60 shipping. I hope he likes a nice helicoil job lol, stronger threads.
Far as I know my new fuel system hasn't been this good since factory, starts 2nd pull (even on 1 cyl). Unfortunately, I don't have a fuel pressure gauge... though I could prolly make one for cheap.

[NapaMatt]

and ur reeds are good.. an the intake boot?