banshee stock hp vs yfz stock hp

[Yzrider054]

do any of you know the hp of a banshee compared to a yfz450 ?

[2fun]

Originally Posted by Yzrider054

do any of you know the hp of a banshee compared to a yfz450 ?

Stock HP Banshee 34-36 RWHP
Stock YFZ 38-39 RWHP

[zuki]

But in the dunes, you have the RPM advantage over the 450

[Woody_YZF]

Originally Posted by zuki

But in the dunes, you have the RPM advantage over the 450

Not much RPM advantage and unfortunately not as much advantage as the low end advantage the YFZ has and the Banshee weighs 35 more lbs. A stock Banshee won't take a stock YFZ, however they're not that far off.

[ekholms-mx-farm]

Are you bad mouthin' banshee's!
Why I auta!!!
JK!!! darn yfz ridders!

[Woody_YZF]

Originally Posted by ekholms-mx-farm

Are you bad mouthin' banshee's!
Why I auta!!!
JK!!! darn yfz ridders!

Not bad mouthing the Banshee riders. Just stating the facts!!

[ekholms-mx-farm]

I guess the truth just hurts a little.
I think I'll go hug my banshee and tell her it will be ok!

[reknelb]

Apples and oranges. A yfz engine from the dealer is almost at its hp limit. An aftermarket exhaust, filter, and some fine tuning on the jetting may get you another 2-4 hp. A banshee engine from the dealer is in a severe state of restriction. A set of pipes, air filters, and some jetting will net you about 12-15 hp. Advantage banshee. Try to get those kind of gains from any of the new 4 strokes and you will be out some serious coin. Not to mention the life expectency of your top end is about the same as a scheduled piston change on a 125 2stroke.

[ktyfz]

Originally Posted by reknelb

Apples and oranges. A yfz engine from the dealer is almost at its hp limit. An aftermarket exhaust, filter, and some fine tuning on the jetting may get you another 2-4 hp. A banshee engine from the dealer is in a severe state of restriction. A set of pipes, air filters, and some jetting will net you about 12-15 hp. Advantage banshee. Try to get those kind of gains from any of the new 4 strokes and you will be out some serious coin. Not to mention the life expectency of your top end is about the same as a scheduled piston change on a 125 2stroke.

You must have some very bad information. A stock YFZ engine is now where near its HP limits. Stock the YFZ engine is very de-tuned. Get a intake, exhaust, do the cam mod and your talking 10+ more HP. May be I should let you take me YFZ for a ride to see that I'm getting way more then 2-4 HP more then stock . Not to mention I've wasted many mildly moded Banshees .. mild being pipes, airfilter, and jetting.

[reknelb]

Originally Posted by Crunk

You must have some very bad information. A stock YFZ engine is now where near its HP limits. Stock the YFZ engine is very de-tuned. Get a intake, exhaust, do the cam mod and your talking 10+ more HP. May be I should let you take me YFZ for a ride to see that I'm getting way more then 2-4 HP more then stock . Not to mention I've wasted many mildly moded Banshees .. mild being pipes, airfilter, and jetting.

I'm talking bolt-on. No internal engine work.

I guess if you believe everything the mags tell you then yes, my info would be very bad. Unfortunately, for you and the mags, I've helped out on and off at local performance shop for the past 7-8 years. The dyno dont lie.

I don't doubt that you've wasted some banshees on your quad. The yammy 450 is probly the best sport quad ever made. But as far as hp goes, the banshee engine is far superior when it comes to potential hp numbers.

[MotoMan]

Originally Posted by reknelb

Not to mention the life expectency of your top end is about the same as a scheduled piston change on a 125 2stroke.

What in the world are you talking about??? I would have went thru 4 top ends in a 125 by now with my 450.....I haven't done ANYTHING to it. : Gimme a break. lol

[reknelb]

Originally Posted by MotoMan

What in the world are you talking about??? I would have went thru 4 top ends in a 125 by now with my 450.....I haven't done ANYTHING to it. : Gimme a break. lol

That was my attepmt at sarcasm. I can't log on to a dirtbike/atv website lately without reading about all the top end problems with the new 4strokes. My point being 4strokes are no longer the "gas and go" machines they used to be.

[MotoMan]

No they aren't your daddy's 4 stroke...that's for sure. lol. But in my experiance they outlast the pingers 3 to 1 on rebuilds...however when you do rebuild the 4strokes it can get expensive, so it evens out really.

[ktyfz]

Originally Posted by reknelb

I'm talking bolt-on. No internal engine work.

I guess if you believe everything the mags tell you then yes, my info would be very bad. Unfortunately, for you and the mags, I've helped out on and off at local performance shop for the past 7-8 years. The dyno dont lie.

I don't doubt that you've wasted some banshees on your quad. The yammy 450 is probly the best sport quad ever made. But as far as hp goes, the banshee engine is far superior when it comes to potential hp numbers.

All I have on my YFZ is bolt-ons and I can guarentee you that I'm getting more then 4 HP over stock. Like you said .. the dyno don't lie...checkout what mixxer has been doing over on trx450r.org with his YFZ with bolt-ons.

[Only registered and activated users can see links. ]

One thing I don't want to do is turn this into a bash session. If there is one thing I like the most about allthingsmoto is that there isn't any bashing between members like most of the other sites out there. I just don't think your information is reality. BTW what type of quad do you ride?

[Woody_YZF]

I agree that the Banshee is tough to beat if you have deep pockets, especially for hill shooting and it definitely has it's place in the ATV world. However your information is a bit flawed when talking about gains. There is a man on this site (FFRacing11x) that has a YZ450F that puts out 60 plus hp and is still reliable and the YFZ has similar potential. I know there are Banshee's out there that put out more than that though, so I think I get your point, but dollar for dollar, I think the YFZ holds it's own quite well, as I too have beat many Banshee's in hill climbs with just my pipe, K&N and jetting.

[reknelb]

Originally Posted by Crunk

All I have on my YFZ is bolt-ons and I can guarentee you that I'm getting more then 4 HP over stock. Like you said .. the dyno don't lie...checkout what mixxer has been doing over on trx450r.org with his YFZ with bolt-ons.

[Only registered and activated users can see links. ]

One thing I don't want to do is turn this into a bash session. If there is one thing I like the most about allthingsmoto is that there isn't any bashing between members like most of the other sites out there. I just don't think your information is reality. BTW what type of quad do you ride?

How can you garuntee me? Do you have before and after dyno runs?
I ride a kx500

[ktyfz]

Originally Posted by reknelb

How can you garuntee me? Do you have before and after dyno runs?
I ride a kx500

PM mixxer on trx450r.org and ask him for his opinion.

[reknelb]

I don't need any opinions. I have seen it with my own eyes.

I'll stick with my original statement.

A yfz engine from the dealer is almost at its hp limit. An aftermarket exhaust, filter, and some fine tuning on the jetting may get you another 2-4 hp. A banshee engine from the dealer is in a severe state of restriction. A set of pipes, air filters, and some jetting will net you about 12-15 hp. Advantage banshee. Try to get those kind of gains from any of the new 4 strokes and you will be out some serious coin.

The only change I would make to my statement is, I would have said "at it's hp limit with stock internals in the engine." Obviously there are always gains to be had with high comp big bore pistons , cams, porting, big valves , etc.


I'm not trying to bash your yfz's, like I said in an earlier post, it's probly the best sport quad ever made. But, for pure hp numbers the banshee is king. The original question did not specify stock or built. Do a search on bansheeHQ and you will find dozens of dyno runs from 65-75 hp., and a handful more in the 85+hp range. Most of the high hp banshee's have been stroked, piped, etc, etc. But even a full blown out, normally aspirated yfz engine would not come even close to those numbers. Now if someone were to make a turbo that fit the 4stroker, then its a new ball game

[Kev_CR]

Originally Posted by reknelb

Now if someone were to make a turbo that fit the 4stroker, then its a new ball game

Someone makes a turbo to fit the 400EX and Raptor.. I saw a moded turbo 400EX that was lightened to under 300lbs and had dyno charts showing 65hp sell on ebay a few months back. from what I hear it was a top contender in it's class at FSW.

Here's a site with info on the turbo system: [Only registered and activated users can see links. ]

[Woody_YZF]

Turbo is just crazy. Of course so is noss. I guess if all you care about is speed in a straight line, then that's the way to go.

As far as the argument at hand. I have no intermal mods done to my YFZ, yet I have upped the hp #'s around 10 hp. Bolt on wise, I don't think there's much more you can do than has been done to mine, but I definitely gained more than 4 hp. My pipe alone gave me at least that gain.