New mxa 250 dyno shootout has two strokes!!!!

Denn700
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Denn700
Edited Date/Time 2/16/2012 7:21pm
the new mxa 250 dyno shootout included the 150sx and 250sx. I am surprised at 11,000 the 150 made more hp than all the 4 strokes and the ktm 250 sx.
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TerryK
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TerryK 2/16/2012 4:49pm
2/16/2012 4:49pm
Denn700 wrote:
the new mxa 250 dyno shootout included the 150sx and 250sx. I am surprised at 11,000 the 150 made more hp than all the 4 strokes...
the new mxa 250 dyno shootout included the 150sx and 250sx. I am surprised at 11,000 the 150 made more hp than all the 4 strokes and the ktm 250 sx.
Thats because a 250SX peaks at around 9500 or so. All 2 strokes fall on their face at a certain rpm. They keep revving but make no power.
Denn700
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Denn700 2/16/2012 4:56pm
2/16/2012 4:56pm
The 250sx makes the most power until 10,000. The 150sx from 10-11,000 and the kx250f from 12 up.
TerryK
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TerryK 2/16/2012 5:02pm
2/16/2012 5:02pm
Denn700 wrote:
The 250sx makes the most power until 10,000. The 150sx from 10-11,000 and the kx250f from 12 up.
Which really means nothing because you don't ride a 250 two stroke at 10,000 + rpm. It's all apples to oranges.

The 250sx makes 49hp
the 150 makes 32 (ish)
the 250f makes 34hp
keeptwostrokesalive 2/16/2012 5:37pm
2/16/2012 5:37pm
Denn700 wrote:
The 250sx makes the most power until 10,000. The 150sx from 10-11,000 and the kx250f from 12 up.
TerryK wrote:
Which really means nothing because you don't ride a 250 two stroke at 10,000 + rpm. It's all apples to oranges. The 250sx makes 49hp the...
Which really means nothing because you don't ride a 250 two stroke at 10,000 + rpm. It's all apples to oranges.

The 250sx makes 49hp
the 150 makes 32 (ish)
the 250f makes 34hp
Im pretty sure the150sx makes more horespower than all the 250fs. I could be wrong though.

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Denn700
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Denn700 2/16/2012 5:37pm
2/16/2012 5:37pm
You are close Terry but the KX and the 150 both make 38 with the KX having a little more peak. The other 250's make 34-36. The 150 has a very short sweet spot at only 2000 rpm's. What is crazy is the 2011 without the linkage made 40 hp. I agree with you on the 10,000 thing for the 250 sx.
TerryK
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TerryK 2/16/2012 5:38pm
2/16/2012 5:38pm
Denn700 wrote:
You are close Terry but the KX and the 150 both make 38 with the KX having a little more peak. The other 250's make 34-36...
You are close Terry but the KX and the 150 both make 38 with the KX having a little more peak. The other 250's make 34-36. The 150 has a very short sweet spot at only 2000 rpm's. What is crazy is the 2011 without the linkage made 40 hp. I agree with you on the 10,000 thing for the 250 sx.
I was just guessing what the 150 made for the sake of argument.
rustytrombone 2/16/2012 6:00pm
2/16/2012 6:00pm Edited Date/Time 2/16/2012 6:01pm
And at one point in time (2011 IIRC) the 150 was pumping out over 40 HP.
Denn700
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Denn700 2/16/2012 6:33pm
2/16/2012 6:33pm
The reason the 2012 150 and 250sx don't make as much hosrepowe as the past models has to do with the airboot. When they added a link to the shock it doesn't get a straight shot which makes it have less airflow. You can read the 2012 test on the 250sx and 150sx on the MXA website and it mentions it.
rbigair40
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rbigair40 2/16/2012 6:33pm
2/16/2012 6:33pm
The linkless katooms have a straighter intake track that = more HP
surfdunn
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surfdunn 2/16/2012 6:41pm
2/16/2012 6:41pm
Any torque numbers?
easton
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easton 2/16/2012 6:53pm
2/16/2012 6:53pm
rbigair40 wrote:
The linkless katooms have a straighter intake track that = more HP
If you created radiuos in the intake you would also increase air velicity. Next time your bike is on a dyno put a air boot that has a direct 90 degree turn and your number will go up. This requires not having the subframes on for most bikes.
CR250Rider
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CR250Rider 2/16/2012 7:20pm
2/16/2012 7:20pm
JPEG of said dyno ?
Smitch
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Smitch 2/16/2012 7:21pm
2/16/2012 7:21pm
Link?

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