need help identifying an old Kawasaki dirt bike engine - KawiForums - Kawasaki Motorcycle Forums
 
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post #1 of 5 (permalink) Old 10-19-2015, 03:11 PM Thread Starter
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Question need help identifying an old Kawasaki dirt bike engine

hello im here wondering if anyone can help me identify an old Kawasaki dirt bike engine that i received from a relative along with the bike. its a 2 stroke (most likely 90-100cc) its not seized at all and im looking to get the jug honed and i cant seem to find any model number or anything on it ill post some photos below
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Last edited by decepticons362; 10-20-2015 at 12:30 AM. Reason: error fixing and adding photos
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post #2 of 5 (permalink) Old 10-19-2015, 07:29 PM
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Since the carb is inside the right front of the engine case, it looks the same as the Kawasaki 1970 100cc 2-stroke enduro that I bought used in 1972 when I was 13 years old.

It was a good running bike, if you added a new or sandblasted spark plug regularly, and if it is a 5-speed, it is best to add a much bigger back sprocket to avoid the 1 to 2 and 2 to 1 shifts by starting out in 2nd. gear- it often shifted to neutral instead, especially when going up a steep hill and trying to shift from 2 to 1.

Here is a video for one (this one is a 10-speed with high and low for the 5 transmission gears):
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https://www.youtube.com/watch?v=ymteHdCVSd4
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“Banking institutions have banished precious metals and substituted a more fluctuating and unsafe medium; they have withdrawn capital from useful improvements and employments to nourish idleness for the few, who prefer demoralizing pursuits to labors useful to the whole; the peace of the whole is endangered by evils more easily to be deplored than remedied." by Thomas Jefferson,1810 (edited)

Last edited by Jeff in Kentucky; 10-19-2015 at 07:36 PM.
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post #3 of 5 (permalink) Old 10-19-2015, 08:19 PM Thread Starter
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thank you so much for the information, and yes i forgot to mention it is a rotary valve (at least i think that what its called) my grandfather bought this engine as a replacement for a 90cc bored to a 100cc Kawasaki that i believe they had on a "grant van tech" frame which i think was like a universal conversion frame that my grandfather set up for my uncle as a racing bike originally in Louisville in 1968. just wondering if you happen to know if there is even a way to find parts for this motor anymore
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post #4 of 5 (permalink) Old 10-21-2015, 05:16 PM Thread Starter
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also what service manual would i need to work on this engine? if anyone knows...
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post #5 of 5 (permalink) Old 10-21-2015, 07:14 PM
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Below is a manual for sale, for the 1971 plus G5 and KE100 (the ones with a 100cc 2-stroke engine and a 5-speed transmission). It might be possible to find a free download somewhere online.
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1971-1981 Kawasaki G5 KE100 Motorcycle Service Manual
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Below might be the correct wiring diagram:
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http://www.classiccycles.org/media/D...8dffffe417.JPG
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“Banking institutions have banished precious metals and substituted a more fluctuating and unsafe medium; they have withdrawn capital from useful improvements and employments to nourish idleness for the few, who prefer demoralizing pursuits to labors useful to the whole; the peace of the whole is endangered by evils more easily to be deplored than remedied." by Thomas Jefferson,1810 (edited)

Last edited by Jeff in Kentucky; 10-22-2015 at 08:19 PM.
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