Here is a couple of dyno runs from my 04 TRX450r. What do you guys think about the numbers?

64.27hp 43.57 ft lbs
64.20hp 43.56 ft lbs

DynoJet Dyno Set on SAE


Click to view attachment

Nice numbers...torque, horespower, and the way it builds power looks like its 530cc+.

What the heck is killing your over rev? Seems like a stock bore, 3mm stroker 450r should pull to at least 9500.

What carb/pipe are you using?

Nice runs. seems like alot of torque for +3 stockbore.

Stock bore 3mm stroke I promise. I do run alky and nitro mixture of fuel so that bumps my torque up some from a gasser.

I think it may be running on just compression in the higher revs cause we can't get the fuel lit. Not sure about that but just a thought.

I run a FTZ TM Flat Slide bored out to 41 and an Nmotion pipe

Nitro!? Hill bike I guess?

What percentage of nitro are you running??

Dont forget we milled the head .040 so in reality you are 15-15.5:1 cr

The fuel we run is 20% by volume in our area is usually around 16-18% if you test with a hydrometer. just alot easier to mix that way and have never had a problem.

This bike has to be the hardest pulling smallbore I have ever been on. that TQ is impressive.
My personal 550 is only running 66-67 hp and 48.5tq on the same dyno.

Flatdrags

Yea what he said.

How big of jets are you running on Alky with nitro? How much does a 20%gallon cost?

I run a 128 Main in a FTZ Flatslide . I get the alky for about $2.15 a gallon and the nitro is $60.00 a gallon. So a five gallon jug mixed cost about $69.00

those are some serious #'s

hey, BS racing? thats where im going to try and get mine dyno'ed next week hopefully

Give us a call (765)629-2869 or (765)969-3260
Located in Milroy, IN. 46156

Got nitro's bike on the track for the first time last nite. 150ft fair race he won atleast two classes and got third in the open outlaw. not bad nitro.... just wait till thurs nite the first 300ft track. your mine this time. LOL

good build...let us know what kind of times it runs in the 300ft..

They will Find HP believe me

Will do. We run Thursday night 6-25-09 in Richmond , IN on a 300ft track. If anybody is in the area come on out. Wolfe Bros racing is putting on the race. Its always a good turnout and big 4stroke classes. More info on their website wolfebros.com

nice numbers!

sweet! questions if you do no mind....you can pm if you like, not trying to put you on the spot

do they have a rate you can advertise? a cheap rate for a few runs, and one for tuning? do they have an a/f meter?

would they be willing to let you change your own jets and watch?

$90/hr 1/2 hr minimum. you can do anything you want. we will do something else and you can swap cams or whatever you want.

no A/F but three runs I can tell you what direction to go.

Well went racing last night and the best time I ran was a 4.98 . Not the numbers I was looking for but the track didn't seem as fast as it has in years past. It was very very loose on the big end.

What Kind of numbers are you guys running out there?

Nice build guys and thanks for sharing.

last year my stock bore/stroke bike w/155lb rider ran 4.8s only making 49.5hp and 35ftlbs mild motor,shifting,on gas. you should be able to shave some more off of yours! nitro is a hard thing to deal with as it evaporates between rounds. i know chris carroll has his stock bore down into the 4.7s now. it will take ya some time! post some pics of your ride!

http://s837.photobucket.com/albums/zz298/kingersgto/
there is an old pic of mine looks the same but ditched the seat cover.

We were on a hard pack dirt but at about 200-225ft it was loose marbles. I could feel my bike slow down. it's a light lonestar xulw 550cc and I went a best of 4.48 and consistant 4.5's