Join Date: Oct 2013
I Ride: 1996 Kawasaki Ninja ZX6R
Engine lag/stall: HELP
Hey guys, big updates to come, I decided not to sell the bike and subsequently tore the engine completely down, put a new upper and lower crankcase on and all new gaskets, and timing back to factory. Replaced everything out of tolerance and after a carb sync I thought she was going to run beautifully...
-smog block-off plates and all extra vacuum lines closed off
-K&N air filter (brand new... problem?)
She idles and revs fine when on the bike stand. Took her out and pulls well in 1st and 2nd throughout the entirety of the rev range, although a slight hiccup on the low rev at first. Once in 3rd (and up), she bogs a bit and will not accel much, and stops just short of 9k rpm no matter what (WOT). I found that if I downshifted and got her up past 11k, she would take off hard up to redline. So... fuel is good, spark is good, air problem? I have had this happen a few time in the past, but she would ALWAYS backfire hard and take off and run great up until the next time I tore her down. Side note, dont continue to ride with an problem like this at high revs, I melted the fiber casing on my exhaust completely off and she was running hard enough to piss oil out of a loosely torqued banjo bolt. Temp was fine though and had plenty of oil when that shit went down. Anyways, Iíve been testing different vacuum hose configurations with no luck and want to see if maybe im having some sort of back-pressure issue. May try and swap my old air filter back in to see if that is the issue to. Let me know what you think.
I tend to get things right on the second attempt
Last edited by Brandon35; 08-04-2019 at 12:38 PM.