KDX motor age?

I am pretty sure your motor is a 89-94 series.first air cooled kdx 200 motor .If your motor look exactly like this you are sure this is a 89-94 motor.but .look the code on the head ex( E-1) E-2 ... and call your kawa dealer so see what year the motor is...or maybe someone here with a 94 service manual can tell you because all year and model codes are written in the back.

http://www.bikepics.com/pictures/167022/

The first generation aircooled KDX200 engines were the '83-'85. These have no KIPS valve. There were minor jetting differences and pipe differences on the '83. These were considered a very strong 200cc motor in their day. Good all around power.

The '86-'88 is basically the same engine as the '83-85 but it has an exhaust valve. The '86-'88 can rip, and are noticeably stronger on top than the non-KIPS engines.

I would feel comforatable running 32:1 in any of these engines. BTW, running more oil (say 20:1) is actuall a LEANER mixture, as there is less gasoline taken in by the engine each cycle. FWIW, many people run 40:1 or even 45:1 for trail riding, but 32:1 is generally consdiered a nice safe mix with plenty of oil.

Running rich can cause you to foul spark plugs, as well has to have poor throttle response and lack of power. Running lean can be much worse, causing overheating, etc... Signs of lean running/overheating including pinging, and white or grey spark plugs.

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in your clymer manual, look at page 19...

engine serial numbers table.

going by your info, your engine would be from a 1985 model. no KIPS power valve.

sounds like a wicked combination with a far superior suspension and frame setup.

they're not a bad little motor, coming from an '84 model KDX200 'aussie' owner of almost a year now.

cheers.
Rob C.

http://www.labyrinth.net.au/~rcacic/kdx200