KDX 200 vs KX 250

Got questions? We got answers....
Post Reply
mad_monkey
Member
Posts: 6
Joined: 02:45 am Apr 24 2011
Country:
Location: Auckland New Zealand

KDX 200 vs KX 250

Post by mad_monkey »

Hey guys. I have just got into dirt riding and bought a kdx 200. I don't think it is going as hard as it should. My mate has a kx 250 with afew mods and leaves me for dead in a straight line. The power band on the kx is very noticable, but on my kdx it feels very restictive and the exhaust note doesn't change like on the kx. Is this just how kdx's are or is something possibly wrong with the kips or other things.

Any theorys, hints, tips and feedback will be greatly appreciated. I'm on a tight budget so any cost effective ways of getting more grunt would be awesome.

Cheers
Ian
House keeping?? I come in now? i Clean?
User avatar
kdxmaniac
Supporting Member
Posts: 595
Joined: 09:01 pm May 24 2010
Country:

Post by kdxmaniac »

check the kips. they may not be working right, or cloged{stiking}.
i am going to be the first to say that the kdx200 will not keep up in the straights with a kx250 no matter how good it runs....2 different bikes, for 2 different purposes........but your buddy souldnt just leave you in the dust!
my bikes
-------------
96 ktm 300
96 XR400R
07 hayabusa
77 kz 1000
85 goldwing 1200
02 BIG DOG PITBULL

gone but not forgotten
96 kdx 200
98 ktm 380 "because it dang near killed me!"
97 ktm 360
96 ktm 250
93 wr 250
94 dr 350s
93 kx 250
07 gsxr 1000
99 bandit 1200
mad_monkey
Member
Posts: 6
Joined: 02:45 am Apr 24 2011
Country:
Location: Auckland New Zealand

Post by mad_monkey »

Thanks bud
House keeping?? I come in now? i Clean?
User avatar
kdxmaniac
Supporting Member
Posts: 595
Joined: 09:01 pm May 24 2010
Country:

Post by kdxmaniac »

is the bike running rich? alot of smoke? being rich could also cause it to not open up on top. a few things to cheak.

1} air filter
2} spark plug
3} float level
4} kips
5} exaust {see if its restricted}
6} reeds
my bikes
-------------
96 ktm 300
96 XR400R
07 hayabusa
77 kz 1000
85 goldwing 1200
02 BIG DOG PITBULL

gone but not forgotten
96 kdx 200
98 ktm 380 "because it dang near killed me!"
97 ktm 360
96 ktm 250
93 wr 250
94 dr 350s
93 kx 250
07 gsxr 1000
99 bandit 1200
mad_monkey
Member
Posts: 6
Joined: 02:45 am Apr 24 2011
Country:
Location: Auckland New Zealand

Post by mad_monkey »

Running it at 32:1 not much smoke. Have done filter and plug. Bike had been sitting around for afew years before i bough it. Smoked bad for the 1st hour or so then came right. How do you check the KIPS and reeds? Tried to find info on google about KIPS but have had little sucess.

Cheers
House keeping?? I come in now? i Clean?
User avatar
scheckaet
KDXRider.net
KDXRider.net
Posts: 3740
Joined: 12:09 am Nov 10 2005
Country:
Location: edmond oklahoma

Post by scheckaet »

fire up the bike, warm up, remove the slotted kips cover on the left side of the engine. when you rev it you should see the gear rotating, then as the engine slows down, it should return to the resting position.
reeds you'll have to remove the carb and inspect them.
User avatar
sped66
Supporting Member
Posts: 427
Joined: 11:29 am Oct 09 2010
Country: USA
Location: Near Winston-Salem, NC

Post by sped66 »

Per scheckaet's instructions, something like this:

[youtube][/youtube]
In the stable: '00 KDX220R, '02 XR250R
Gone but not forgotten: '80 XR80, '87 XR200R, '94 KDX250, '01 YZ426F, '86 XR220R
User avatar
scheckaet
KDXRider.net
KDXRider.net
Posts: 3740
Joined: 12:09 am Nov 10 2005
Country:
Location: edmond oklahoma

Post by scheckaet »

video is even better :supz:
mad_monkey
Member
Posts: 6
Joined: 02:45 am Apr 24 2011
Country:
Location: Auckland New Zealand

Post by mad_monkey »

Can't find anything that looks like that. Mine is a 94
House keeping?? I come in now? i Clean?
User avatar
scheckaet
KDXRider.net
KDXRider.net
Posts: 3740
Joined: 12:09 am Nov 10 2005
Country:
Location: edmond oklahoma

Post by scheckaet »

94?
the odds are the kips valves are stripped and will need to be replaced.
KDXrider1989
Member
Posts: 643
Joined: 09:05 pm Sep 07 2010
Country:
Location: Houston, TX

Post by KDXrider1989 »

I have an '89, but it's the same model from '89-'94 (E-series) what I did to ensure that the KIPS on my bike were working is remove the right side plastic cover on the cylinder and rev the bike. The shaft should slide out smoothly on higher revs and recede back to the original position once the rpm's lower. Still unsure? Turn the bike off and remove the exhaust and keep the plastic cover off. Pull the shaft in and out and look up and into the cylinder head. You should see the valves on the sides open and close. If you don't, then something is screwed up.
KDXrider1989
Member
Posts: 643
Joined: 09:05 pm Sep 07 2010
Country:
Location: Houston, TX

Post by KDXrider1989 »

E-series KDXs are notorious for the KIPS system to fail. I wouldn't know what the KDX would feel and act like if it failed, but I know for a fact that it would never keep up in a straight line with a KX250 in stock form
mad_monkey
Member
Posts: 6
Joined: 02:45 am Apr 24 2011
Country:
Location: Auckland New Zealand

Post by mad_monkey »

Think i've sorted it. The rod coming out of gearbox was sitting on the end of the valve. Moved rod inbetween 2 washer looking things. Seems to be running better but weather is to crap to go for a blat so can't tell for sure. Cheers :partyman:
House keeping?? I come in now? i Clean?
mad_monkey
Member
Posts: 6
Joined: 02:45 am Apr 24 2011
Country:
Location: Auckland New Zealand

Post by mad_monkey »

Think i've sorted it. The rod coming out of gearbox was sitting on the end of the valve. Moved rod inbetween 2 washer looking things. Seems to be running better but weather is to crap to go for a blat so can't tell for sure. Cheers :partyman:
House keeping?? I come in now? i Clean?
User avatar
Julien D
KDXRider.net
KDXRider.net
Posts: 5858
Joined: 07:53 pm Nov 07 2008
Country: USA
Contact:

Post by Julien D »

Excellent.
Image
KDXrider1989
Member
Posts: 643
Joined: 09:05 pm Sep 07 2010
Country:
Location: Houston, TX

Post by KDXrider1989 »

Post Reply