Dyno testing WR450 2005


4 replies to this topic
  • tmckeown

Posted December 12, 2005 - 12:58 PM

#1

Hi,

Finally went to dyno with my bike to get jetting right for winter to come.

Yamaha WR450
Twinair airfilter and gage
Akropovitch slip-on

Main jet: #168
Needle: DUS-K
Fuel screw: 1 3/4 open
Slow jet: #52

Results:

39KW at 8300 rpm
50Nm at 6880 rpm

Disconnected gray wire from CDI

40Kw at 8300 rpm
51Nm at 6880 rpm

Then tested slip-on with noise damper (96Db), only noticeable change was that with noise-damper it had bit more power and torque below 6000 rpm.

Timo Mc

  • hankdog

Posted December 12, 2005 - 03:16 PM

#2

For all us non-Euros out there: :applause:

Kw x 1.341 = HP
Nm x .7376 = Ft Lb (torque)
so...
39Kw = 52.3 HP
50Nm = 36.88 Ft. Lb.

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  • JSanfilippo

Posted December 12, 2005 - 05:37 PM

#3

Wow 52.3 Hp with a trail bike!!! Thats insane

  • ncampion

Posted December 12, 2005 - 06:43 PM

#4

Peak HP at 8300 RPM - somehow I thought it would peak at a higher RPM.

  • tmckeown

Posted December 13, 2005 - 07:01 AM

#5

Hi,

it is over 39 Kw from 7300 to 9200 rpm

Timo Mc




 
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