Either way it should still pull without any hesitation to the red line and feel ALOT faster than a 125cc 4stroke. I have a 200 exhaust in fair condition sat here, but im not sure if im going to keep it yet in case i can't afford the custom pipe im planning to get made when the time comes.ДЇrom memory the std 200 will pull very well from 2500-7000rpm, and then there is a flat spot as the KIPS valves opens the aux ports and shuts the resonating chamber, but then it pulls again fairly strongly up to 8500rpm, and the power falls slowly as you get over 9000rpm. If you have a std pipe that's not holed or badly dented, then clean it out properly and the silencer too, and see how it goes? If it's an aftermarket pipe it's probably the Fresco/Big one, which Dangerousdave has had confirmed is not for the 200cc engine, and never suited it. It's possible that there is damage to the carb internals, slide, jet holder's etc, but id definately check the exhaust system first TBH. IMO this only really leaves the carburation and exhaust system to look into. It does sound like you have got no engine issues i.e good compression, no air leaks, good sealing on the reed petals etc. There is a massive difference to performance between KIPS being manually set open and closed. I asked BDK to confirm something before I put the top end back on the bike to get no reply, I told them about my problem earlier in the week to be ignored again, got quick replies before I sent the money!ДЄlways hard to suggest causes and diagnose problems from sitting behind an keyboard, but with everything you have said it sounds like you have put the KIPS assembly together correctly, and you have done the test to prove that the govenor actuator is working and at about the right rpms too. I have read the kmx is a lot tamer than the 125, that might be the case but i know this bike is nowhere near what it should be! I've worked on many 2 strokes in the past and have a good idea of what i'm doing, i've never worked on a KIPS powervalves before although they're extremely simple! I'm really stumped and would really appreciate any advice! the valves have shut off the chamber when the arm is in and they open up the chamber after 7k when the arm pulls them open!

Just took the exhaust off to have a look at the valves and from what i can see, they look exactly as they should!. I've read a lot about the kmx on here as a guest so thought i'd join!Д«asically, i've rebuilt the top end on the bike, new piston, honed cylinder etc all the usual stuff, i got some new steel powervalves from BDK lined them up perfectly as per there instructions.ДЄfter running the bike in there is no kick from the powervalves at all, past 7k it just climbs slowly up the range and moves no quicker than a 4 stroke 125!Д¬ompression is good, new spark plug, put the carb back to manufacturer spec, took the cover off and checked the actuator arm is coming out at 7k, it is.

Hi all, just joined and stuck up a thread in the bike picture section of my bikes.

Kawasaki kmx 125 power valve