Typical lean running solutions
Ok. Here is my first post.
So I am new to riding a GSX-R1000 so I don't have enough set time to fully know what they are like. I grew up riding dirt bikes and a kawi 250 street bike. I live in Montana and there are a few dealer bike shops but I have heard un-amazing things about most of them, so I am bit strapped for reputable servicing just for a little background info.
This summer I bought a used 2011 GSX-R1000 with 4k miles. It has a stock air filter, jardine GP1 exhaust with CAT removed, and a PC5 on board. I spent most of the summer driving in c mode at under 7k RPM to get used to the bike. Then for the last month I have been driving on default A but under 7k RPM still. And honestly the DMS is pointless under 5-7k I can barely tell the difference. above 7K there is of course.
So last week I started running the bike harder and pushing it to 10K RPM to try it out on some back roads. I ran hard up the the gears with open throttle, half throttle and all over the place to see what it was like. Fun tank of gas let me tell you
I thought the bike ran hard but I didn't really notice any power gain above 10K RPM and every now and then if I was only at about 70% throttle around 9k rpm I would get some power loss and then kick back in. Also when I close the throttle and decelerate down from 8-10k I get some popping.
This let me to believe the bike was running lean. There is a guy with a Dyno in town and he has ran it for 20 years so he "knows what he's doing" per him. mostly tuning old sports cars but other bikes too. I told him to check it out and let me know. He said the bike was very lean. anything above 6500 RPM ( i believe when the second set of injectors fire) the bike leans out severely, like off the dyno chart bad, above 18-20 AFR. So to compensate and get to around the 13 - 13.5 range he had to add anywhere from 35% to 84% full above stock. I called dyno in vegas and they said that is crazy. Said either a fuel delivery problem or the guys didn't know what he was doing. I ran the bike with this set up and it was unrideable, it when rich at 7k and would cut out. So I pulled a stock map from the dyno site and it is back to normal but with more popping than before.
Sorry for the length but I don't know much about engines, I just like riding them.
What things should I have checked out.
Fuel pressure for sure - assuming its low
then who knows after that.
I cant imagine the jardine - CAT is the cause for how lean it is. the popping probably. Thoughts. Thanks