Most powerful dirt bike ever made...?

[DELLORTO]

hae i thought it would be interesting to see what the most powerful dirt bike ever made is?? tell me what you think it is....

i think its the kx500...but i realy dont know..

[wilber]

KTM 950 super enduro

[DELLORTO]

KTM 950 super enduro

that dosnt count....

[xr-rider]

aprillia rxv550

[DELLORTO]

thats does a v-twin count?? i guess so....but i realy think thats more of a super-motard.....

[DEATH_INC.]

What about tha Maico 760 (?) monster from back in the 80's?

[DELLORTO]

What about tha Maico 760 (?) monster from back in the 80's?

id say a fuel injected 450 would eat it for supper.......not!!


thats a good one.....760cc two stroke......:gob: thats right 70hp!!!!!

[Reckless]

Google search came up with this attached!

[DEATH_INC.]

id say a fuel injected 450 would eat it for supper.......
I dunno, a bit of searching finds they were detuned to 43hp.....@4000 rpm. It also made 26hp @1200 rpm.....haven't found any torque figures yet....

[DELLORTO]

Google search came up with this attached!

try riding that at the sanpit......:shit:....

[DELLORTO]

I dunno, a bit of searching finds they were detuned to 43hp.....@4000 rpm. It also made 26hp @1200 rpm.....haven't found any torque figures yet....

i found some hp figures and apparenty it made 70hp......:shit:

[DEATH_INC.]

i found some hp figures and apparenty it made 70hp......:shit:
It was capable of that, but the components weren't....
http://www.superhunky.com/articles/nov00rsMaico760.php

[CB ARGH]

PW50 with a Hayabusa turbo, NOS, and a lowering kit. Not to mention a big bore, LED lights, and a super lightweight set of alluminium dust caps.

[DELLORTO]

well.........thats the end of that bike.....a 450 makes 58hp++

[DELLORTO]

PW50 with a Hayabusa turbo, NOS, and a lowering kit. Not to mention a big bore, LED lights, and a super lightweight set of alluminium dust caps.

your missing the tassels?? :laugh:

[Armitage Shanks]

Not sure but the KTM 550 two stroke from the late '90's poked out some serious HP's but was a short lived machine. My guess is the KX500 which was discontinued in '04 at around 65hp's at the crank vs a dry weight of 100kg, the CR500 ( discontinued in 2001) which weighed a little more had a crank reading of ( claimed ) 64 hp and 101kg so it's semantics. I'm lucky to have one of both still ....:whistle

Been riding 500's for over 10 years now including some nasty bitches ! Well...I guess they all are.....:crazy:

[ArcherWC]

What about tha Maico 760 (?) monster from back in the 80's?


that would be my guess too

[courts]

booms cr250 makes 70hp + doesnt it?:Pokey:
farkin pussy 4 strokes blah blah...............

[cheese]

Come on don't be silly. Its 65hp

[xr-rider]

i reckon the new atk 700 2 stroke, 78hp.
the new maico 700 2 stroke, 81hp:gob:

[honda_power]

the ATK intimidator wins hands down. 700cc Two Stroke MX Bike. They still make em now.

"Apparently no one's told Utah-based ATK Motorcycles that two-strokes are dead. Their 700 Intimidator features a 78bhp, 700cc two-stroke engine in a top-drawer motocross chassis. The whole thing weighs just 238lbs dry. That’s about the same as a current 450cc four-stroke motocross bike but with nearly twice the power."

http://hellforleathermagazine.com/2008/04/atk-confirms-2009-700-intimida.html

[DELLORTO]

ok we have a winner ATK 700CC 2 SMOKER !!! suck on that 4t's

[Ktmboy]

Now that is a beast and one that yours truly could really get exited about. Jeez...

[McJim]

Why not just drop a huge fuggin' engine in a dirt bike frame and be done with it?

[cheese]

I saw a vid of something like that. it was some road bike 1000cc engine in a dirt frame.

[warewolf]

78bhp? Bah humbug. Try 125 !!

Kenny Roberts' 1975 Yamaha TZ750 (http://motorcyclemuseum.org/classics/bike.asp?id=42) dirt-tracker. 750cc 4cyl 2T. And yeah McJim: they did what you suggested :lol:

[A&R]

I saw a vid of something like that. it was some road bike 1000cc engine in a dirt frame.

see the link. http://www.zabel-racing.de/en/motors.html does this count these are the mx sidecar engines . 700cc of two stroke knocking out 62 kw, 84.88 hp. I supposed you could shoe horn it into a Cr frame !!! that would be fun!:eek:

see this http://nz.youtube.com/watch?v=9NHvhXPdHMothink i used to do this!!!!

[EJK]

Saw a photo of a Yamaha R1 dirtbike here on KB few months ago. Can't be bothered finding it...

[Reckless]

78bhp? Bah humbug. Try 125 !!

Kenny Roberts' 1975 Yamaha TZ750 (http://motorcyclemuseum.org/classics/bike.asp?id=42) dirt-tracker. 750cc 4cyl 2T. And yeah McJim: they did what you suggested :lol:

Nah dirt tracker, glorified road bike, not a real dirt bike won't go up hills, doesn't count? Bloody nice bike though!




see this http://nz.youtube.com/watch?v=9NHvhXPdHMothink i used to do this!!!!

You mad bastard, Side car MX thats plain crazy!!

[B0000M]

booms cr250 makes 70hp + doesnt it?:Pokey:
farkin pussy 4 strokes blah blah...............


i was only repeating what the interwebby told me, and it was 63, which we established would be at the flywheel.

and yeah, fucken pussy 4 strokes

[Buddha#81]

As a 15-16 year old in the mid '80's I remember being offered a couple of rides on a YZ490. Now at just under 50 HP its never going to be the most powerful dirtbike made but I thought it was at the time. The throttle was more like a switch where it went from a peewee to a 500 motocrosser you just had no idea when, which made it all the more fearsum. A cool bike that a mates dad had and it always gathered plenty of interest.

The most powerful dirtbike I've owned is a warm XR620RF back in the early 90's, the thing was kick starting, ment it tried to shove ya leg up ya arse every time it backfired (all too often). I use to love guys at work asking for a ride, my answer was " if you can get it going, go for it" horrible piece of work that gave me soo much enjoyment.

I've swung and a 120hp speedway sidechair, can that count as a dirtbike?

[DELLORTO]

As a 15-16 year old in the mid '80's I remember being offered a couple of rides on a YZ490. Now at just under 50 HP its never going to be the most powerful dirtbike made but I thought it was at the time. The throttle was more like a switch where it went from a peewee to a 500 motocrosser you just had no idea when, which made it all the more fearsum. A cool bike that a mates dad had and it always gathered plenty of interest.

The most powerful dirtbike I've owned is a warm XR620RF back in the early 90's, the thing was kick starting, ment it tried to shove ya leg up ya arse every time it backfired (all too often). I use to love guys at work asking for a ride, my answer was " if you can get it going, go for it" horrible piece of work that gave me soo much enjoyment.

I've swung and a 120hp speedway sidechair, can that count as a dirtbike?

na that dosnt count......

[noobi]

how about the hillclimb bikes with hayabusa engines and knobblies?

they go up hills

<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/PDszGeznkCI&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/PDszGeznkCI&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>

[thommo77]

YZ495 was pretty damn scary in it's day

[dammad1]

i was only repeating what the interwebby told me, and it was 63, which we established would be at the flywheel.

and yeah, fucken pussy 4 strokes

More proof that you cant always believe everything you read on the web.

[crazyxr250rider]

What about those ATK/Maico 700s??

[DELLORTO]

What about those ATK/Maico 700s??

na their too inificiant and they are very out-dated................:laugh::laugh:

[DELLORTO]

how about the hillclimb bikes with hayabusa engines and knobblies?

they go up hills

<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/PDszGeznkCI&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/PDszGeznkCI&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>

"they go up hills" so does my push-bike.....:laugh::jerry:

[crazyxr250rider]

na their too inificiant and they are very out-dated................:laugh::laugh:I take it you havent seen the new 08/09 range of 250/320/500/680/700 bikes???

[crazyxr250rider]

http://www.maicouk.co.uk/html/mx.html

[cowpoos]

http://www.trickracing1.com/Twin_CR500.html <------ lookie here!!

Can't find the photos and vid's of the bike it went in now....but it was farken quick...and you can still buy a engine!!

[crazyxr250rider]

Holy fuck.:gob:

[Armitage Shanks]

Thought the thread originally referred to Bikes you could buy from the shop, in that case I'd say the KX500 still stands as the King, agreed Maico have a new range out ( and I'd kill to own one ) but they're having major problems establishing dealerships, even in the US. Kenny Roberts old track Bike was essentially a TZ700 in a flat track frame. If you want to go that direction it'd have to be the Hill Climbers with the 4 cyl motors etc that'd rule the roost.

But they're one-offs so, KX500 is the king . I had a YZ490 last model and that was an air cooled pig , detonated , kicked back though once it was running it went like phark...until you wanted to stop . Traded it on a new '98 KX500 never looked back .....:2thumbsup

[Buddha#81]

I had a YZ490 last model and that was an air cooled pig , detonated , kicked back though once it was running it went like phark...until you wanted to stop . 2thumbsup


Yamaha rereleased the 490 as a WR500 in the early '90's they tried to tame the beast within........I don't think they even got close. I remember one cartwheeling past me at a trailride. So in my eyes they still tried to kill their owner and anyone near them. Never make eye contact with an old 490, they will try to hurt you.

[Mort]

What about sidecar motocross. Bona-fide competition dirt bikes. I seem to remember the WASP 1000cc 2strokes knocking out 90 - 100 BHP.

Do I win ?

[cowpoos]

What about sidecar motocross. Bona-fide competition dirt bikes. I seem to remember the WASP 1000cc 2strokes knocking out 90 - 100 BHP.

Do I win ?
nah...my one made 210hp :p

[Armitage Shanks]

Yamaha rereleased the 490 as a WR500 in the early '90's they tried to tame the beast within........I don't think they even got close. I remember one cartwheeling past me at a trailride. So in my eyes they still tried to kill their owner and anyone near them. Never make eye contact with an old 490, they will try to hurt you.

Might have been me, I had a WR500 in '95 and then went on trail rides around Canterbury, what a hoot that was ...put me in an ambulance more than once, that was the Bike I traded on the new KX500 while my dislocated shoulder was still in a sling not the 490 I mentioned before. Superior MC's and Marty Grenfell was the salesman. Still have a pic of the brand new KX500 on the trailer outside the shop, cheers

[McJim]

So if someone took say a Ducati Hypermotard (1100cc twin) or a KTM SM990 and swapped the motard wheels for dirt wheels (I presume this can done the other way) wouldn't that make a more powerful production dirt bike?

[B0000M]

So if someone took say a Ducati Hypermotard (1100cc twin) or a KTM SM990 and swapped the motard wheels for dirt wheels (I presume this can done the other way) wouldn't that make a more powerful production dirt bike?

yes, until you came to a bump larger than about 50mm in height!

pretty sure the swap cant be done that way either