kmx 125 kips opening at 9000rpm ????

[outlaw1982]

hi, im new to this site but not to bikes, i have just bought a kmx125 1988 model for fairly cheap off a friend, it starts no bother and rides fairly well, when i bought it didnt think it was up to much being the smallest crosser ive owned lol, ive played with the carb and got it a little faster, but noticed after a good ride out lastnight the power doesnt come in properly untill it hits 9000revs but seems to be hardly any power in 5th gear and will just cruise in 6th, i have removed the kips cover and can push it with my thumb in and out so i would rule out seizure, ive been told they can be adjusted but dont know nothing about the kip system, any help would be greatly appreciated, i think it will be a very niipy bike if i can get the powervalve coming in sooner
thanks

[dangerousdave]

[Clutchy]

Give it a service
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Malaguti F12 Phantom-Dead, Suzuki AY50- Dead, NRG power DD LQ, CBR125.
*33 BHP restriction up on 10/12/14* Current bikes/car: SV 650 S/ MKIV GOLF
Guide to pass your test with no lessons!

[Ariel Badger]

Strip the carb and clean it. It sounds like it runs fine once it is on the main jet.
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[The other Paul Rudd]

From what I remember about the set up on the KX you should be able to remove a cover, rev it to 7000-9000 rpm and then check if when the KIPS valve activates. I seem to remember the system on the KX was a friction clutch arrangement, so that it didn't need to use a solenoid, and it was adjustable.

[The other Paul Rudd]

[prawny1]

from what I recall about a friends bike years ago they have some sort of shim arrangement for adjustment.
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hellkat wrote:

Some people are only alive cos its against the law to kill them.

[bladerunner]

The kips valves don't really need or have much adjustment I'd set right...they do however snap the exhaust kips valves easy if not maintained......whilst the clutch system valve works ok.....take the exhaust off and look up the port whilst you push the actuator bar across......do the kips vales open and close?
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's

[Captain Liberious]

If you take the cylinder head off you'll be able to lift out the drums and rotate them to alter the alignment, there's normally marks on the drums that line up with marks on the operating rod
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A squid eating dough in a polyethelene bag is fast and bulbous, got me?

[outlaw1982]

thanks for all the replys well today i have stripped the carb down and cleaned it, checked and cleaned the reeds(no bits missing or cracked), removed the filter all together because it is a mess, and adjusted the card again, its running even better but still the same problem, i have also had the exhaust off and both kips seem to open as they should, but the exhaust seal might as well be none existent and also it sound like its got piston slap(knocking from the top end) so would say the rings are worn, but would this really affect the kips working properly like i say it runs fine apart from the kips
thanks again

[outlaw1982]

me again and im slightly confussed, i have took the exhaust off again to double check both kips are opening and try a bit of exhaust assembly paste on just to try a better seal, both kips are defo opening, then was going to put it back together but i put my fingers in the exhaust bore with the piston at the bottom and can wiggle the piston about, obviously needs a new set, then brought the piston further up so i could inspect the rings and found the top one to be missing lol i think ive found my problem but should the bike still be running?
thanks

[dangerousdave]

[outlaw1982]

to be honest i dont think its had 1 fitted, because ive had it out twice and rapped it lol and its never got worse, with my tinkering its actually better, ill have to order 1 and go from there