horsepower of a 250 back in the late 80s?

MX86

Member
Dec 27, 2006
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84 yamaha yz250 put's out 38.7 HP
2000 yamaha yz250 put's out 44.5 HP
2005 yamaha yz250 puts out 46.3 HP
 

MX86

Member
Dec 27, 2006
214
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you also have to remember that some of the 250's didn't have powervalves, also adds it's own in performance
 

Andrewlam

Member
Jul 27, 2015
1
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I have a 88 cr250 I've put some $ into it with a new sleeve, rod, piston. I had it ported and polish fmf pipe. It was tested on my buddy's dino it put out 48hp. Yes I had to spend some $ to get there but I still haven't spent more then it would cost me to buy a newer bike.
 
Dec 17, 2005
35
0
I have a 88 cr250 I've put some $ into it with a new sleeve, rod, piston. I had it ported and polish fmf pipe. It was tested on my buddy's dino it put out 48hp. Yes I had to spend some $ to get there but I still haven't spent more then it would cost me to buy a newer bike.

Is that rear wheel HP?
 
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