How many hp does the rx-1 motor have?

[RX_rider]

so how many hp does the RX motor have on the dyno . is it somewhere around like 137 at about 9800 rpm?

 

[SoCoRX1]

most people get 135-138 on the dyno

 

[welterracer]

You are right.. It is in the mid 130s.. stock

Freddie from ECP dynoed many many of them..

 

[welterracer]

You are right.. It is in the mid 130s.. stock

Freddie from ECP dynoed many many of them..

 

[justin1635]

More with a turbo

 

[ReX]

If it has 137 stock corrected to room temperature.

How much does the 137 hp motor make at -15°C (or close to 0°F).

 

[ReX]

I just did a quick search and found this link:

http://wahiduddin.net/calc/calc_hp.htm

It's an engine hp correction calculator.

It looks like an engine will make about 11.6% more power at 0F than it will at 75F.

So - if the jetting is correct at 0F, a engine making 137 hp at room temperature will make 153 hp at 0F.

If you're riding at 20F, it will make about 149 hp.
If you're riding at 30F, it will make about 147 hp.

I guess when Yamaha claims 145+ hp, they are about right - considering you pretty much always ride at below freezing temperatures.

 

[RX_rider]

thanks alot for the replys. so why does yamaha say 145 ifs it like 10 off? so shuld that mean that the apex has like but 143? but i guess with efi that you get better more consistant hp no matter the air temp? wha you guys think?

 

[RX1 Yooper]

Yamaha says the 06 has 8 more than 05. 150-8=142. I've always heard it was about 142.