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This was found on another forum................... Thought it would be great to share if you have not seen it yet.

Heres a list of some comparable hp numbers.

08 250ex: 16.8hp
08 300ex: 22.1hp
08 400ex: 34.2hp
08 450r: 42.6hp
08 700XX: 53hp
08 KFX450r:42.1
08 KFX700:48.8
08 Z400: 36.6hp
08 Ltr450: 41.6hp
08 Raptor 250: 18.8
08 YFZ450: 38.6hp
08 Raptor700r: 46.9hp

Remarkably, it is making at least 10.4 more hp than any 450 and 7.1 more hp than than Raptor 700r while a modest 4.5hp more than the automatic KFX700 with the mighty V-Twin.

The numbers of from the California Environmental Protection Agency.

http://www.arb.ca.gov/msprog/onroad/cer ... 8/2008.php
 

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That web site is great. I think atv and motorcycle makers should have to publish their Hp and torque #'s on a "window sticker" just like the auto makers.

They all say things like class leading performance when advertising their quad or bike but very few will proudly spill the beans on actual power. Too often you have to play detective to find that out.

Of all the quads that you chose to list, you some how seem to have left out the only other IRS sport quad.
The 525 is rated for 49.6 hp. More hp than the Rap and the same weight. The 525 is more quad than I ever would have guessed. That first shoot out will be interesting to say the least.
 

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That sure is the important hp number. What is all that hp worth unless it makes it to the point of friction (tires to ground). I don't remember exactly but I remember hearing the 700xx is about 43 hp at the tires. Obviously, you can mod your quad to get more of the engine hp to the tires but for stock comparisons it is the hp at the tires that makes the difference. Also, the old weight/hp ratio. I've heard these results before but I've completely forgot these numbers. I believe at least between the rappy and honda they were very close and the outlaw most likely is a little higher. All sweet quads.
 

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Bo, In your quest for more horsepower have you found any specific types or brands of lubricants for transmissions and/or chains that will deliver measurable results at the wheels? (in other words reducing parasitic power loss)
 

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The article says it can be used with wet clutch systems... I believe the Honda oil I purchased was synthetic also
 

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im not 100% sure about synthetic oil in a wet clutch system either because when i had my ninja i asked about synthetic oil and they say not to use it in a wet clutch system untill you get a lot of time on the motor in this case 15k miles or more. if your really worried about engine oil than just change it more often, i doubt i will ever run synthetic oil in my machine.
 

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Like everything you can get many grades and forms of synthetic oil. Most good syth oils are just fine for wet clutches - it will say "suitable for wet type clutchs" somewhere on the front.

If it doesn't say "suitable for wet type clutchs" then don't buy it.

Synthetic oils that are not suitable have an additive called XXXXX ......can't remember.......but is usually listed on the cover as "friction modifiers "........this is the stuff you want to avoid.

Edit: I can remember, "molly" additive.....it's actually got a realy long name but most refer to it as molly.

I use a "full synthetic" oil but most aren't; the companies can say it's synthetic even if it's a blend of the two.

I use Motul 300V Factory Line 15w/50.......expensive stuff. Engine runs better, cooler & longer.

Linc
 

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wow those seem high im puting around 45 to the ground with the big three.
 

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wow those seem high im puting around 45 to the ground with the big three.
Don't get stuck on dyno numbers....dyno's vary and so do the numbers..too many variables involved, best thing is to get a base number and stick with the same dyno so you know what you get from each mod.
 

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Plus, those numbers are as sold numbers and in many cases the motors are all choked down. There is lots of FREE HP in all quads. Unfortunately, they also don't give HP compared to weight. A 45HP quad weighing in at 360lbs is going to have an advantage over a 50HP quad weighing in at over 500lbs. Trust me, I know. :D
 

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Bo, In your quest for more horsepower have you found any specific types or brands of lubricants for transmissions and/or chains that will deliver measurable results at the wheels? (in other words reducing parasitic power loss)
I use Yamalube and chainwax. Never done any dyno testing on it though.
 

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HP #'s from that list are crank hp, look at the dyno sheets we have posted. That is real HP but pay attention to the torque, that is the real tell all #. I am at 56 at the rear wheels as of today. The bike is headed back to EHS for some more work. Throttle body and some other stuff to try, we will keep you posted.
 

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HP #'s from that list are crank hp, look at the dyno sheets we have posted. That is real HP but pay attention to the torque, that is the real tell all #. I am at 56 at the rear wheels as of today. The bike is headed back to EHS for some more work. Throttle body and some other stuff to try, we will keep you posted.
Wow! Whats it like riding a XX with that much power? I want to upgrade so damn bad but I promised myself I'd pay it off first. Bummer!:disgust:
 

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shoot, i wish they had let me finance mine, i'd have so much money left over for goodies. Instead mine was a splurge thing and just went and got it without thinking really about mods, or anything.
 
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