4 stroke power vs 2 stroke please help
Posted April 15, 2004 - 06:25 PM
This is were I need help. Does the WR450 make comparable power to a YZ250? Is the WR250 more like a 125? I do not want 125 power but at the same time I do not want much more than two stroke 250 power. I also ride with friends so need something that can work for both situations.
I guess in summary, can someone let me know how the 2 and 4 strokes stack up for power.
Posted April 15, 2004 - 06:51 PM
Now on the power. The difference between the 2 stroke and 4 is way different. They both have lots of power its different in the way they make it and will take a bit of getting use to for you, but you will adapt pretty quick.
Don't know if any of that answered any of your questions.
Posted April 15, 2004 - 09:23 PM
My girl rides the 250 and I follow her around on the 426. She probably rides about as fast as your son on his XR Go with the 4 stroke, you'll love it
Posted April 15, 2004 - 10:24 PM
Posted April 15, 2004 - 11:56 PM
It's great to have a spare bike The 4 stroke win hands down when you are out for a more relaxed ride.... it's happy at any throttle opening where the 2 smoke just begs you to hold it wide open and flat change it
Posted April 16, 2004 - 04:59 AM
There is more traction and torque in the thumpers than the 2 strokes of the same class. The 2 strokes come into their own when on the pipe. I have ridden both with the kids (250cc stroke and 426). the 426 seems to have more power and hookup, but both worked out fine. Be sure to have a kick stand though with the kids!!!
Posted April 16, 2004 - 10:10 AM
(following numbers from the dyno in Dirt Rider)
The peak HP on the YZ450F was around 48 and stayed there until after 11,000RPM. The YZ250 peak power was around 44hp and died off after 9,000RPM. Yes, the 4 strokes rev higher beleive it or not. Also, the power difference down low was more noticable with the 450 making 37hp at 6,000RPM and the 250 making 30hp. These were all stock bikes with stock exhaust, etc. so I'm not sure if this relationship will remain the same once you mod a bike.
With all this bench racing aside, the two stroke I rode was noticably easier to flick around than my WR but my WR will run right by it in a straight, up a hill, etc.
Posted April 16, 2004 - 01:49 PM