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KTM MX & Off-Road Dirt Bikes
horsepower of a 250 back in the late 80s?
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[QUOTE="Micahdawg, post: 996543, member: 21668"] The new 125's are "approaching" the same power level of the early 80's 250cc two strokes. 125's are cranking out 35+ HP now which is probably close to what early 80's machines were making (maybe they were closer to 40). I had a 89 KX250 that was pretty mild. Stock bore, stroke, 185 psi compression on new rebuild and it ran within a few HP of my 97 RM250. I would guess the KX was under 40HP at the wheels while the RM was just over 40HP at the wheels. Seems like new 250's can achieve around 43-45 HP at the wheels now with little effort. The power valve systems started getting more complex throughout the 80's. Early 80's saw more of a simple butterfly in the exhaust port while my 89 KX had the KIPS with 3 ports...its a slick design and the bike ran great. Micah [/QUOTE]
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Dirt Bike Discussions By Brand
KTM MX & Off-Road Dirt Bikes
horsepower of a 250 back in the late 80s?
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