Doing more with less.......that's what the 450's are all about!

 

You can look at my 450R specs below. Those are the mods I've done to my bike. I've got an HRC kit with a pipe and K&N filter. I run ITP Sand stars and he runs Skat Trak Edges.

You're dang right Raider, I'm thumping my chest, to the top of the hill. (LOL) On paper he should be beating me.

The reason he is beating me through the whoops is most riders start so close to the freakin' whoops and I can't get up to speed quick enough (with my size). When we started further back, I can beat him through the whoops because I'm up to speed (running 3rd through the whoops). The other thing is with my size, it's hard to keep the front down on my 450R.

Last time at Gordon's Well, we (about 6 guys from my group and few others) were racing up highway hill and I was racing a guy on a bored '05 450R and a modded out 400EX and some YFZ's and others, I was getting through the whoops about a 1/2 bike length behind on average. One time my front came up and I decided to keep on the gas and hope it would come down, but it bucked me off and continued on up the hill without me. I have to back off the throttle to run the whoops everytime. My buddies say they had the same problem when riding my bike. I think a longer swing arm would definitely help with that. Some day I guess.

Up highway hill I've got him by 2-4 lengths by the top. Maybe that's not smoking him to some, I guess I was tired of gettin' smoked by him on his bored out Banshee all these years. LOL

None-the-less, he can't beat me. We'll be out there for Halloween this year. I'm the Black '06 R with black C-series ITP wheels. I've only seen one other that looks like mine, but he wasn't as big as me. [img]i/expressions/face-icon-small-smile.gif[/img]

PS. Damn I wrote a novel. Sorry.

 

My bullsh!t meter just went into the red.

 

The 450's have to be high strung, less reliable, and rev much higher to make the hp the big bores do. Compression ratios are high, piston skirts are short and rev limits are approaching 2 stroke territory taking toll on virtually every moving internal part and increasing vibration. They also lack the torque, both at peak and throughout the powerband that the big bores can make in almost embarassingly mild states of tune. Sure a 450 can do a lot on the trails and makes a good recreational machine, but the big bore simply does the job better for the target recreational atv market.

Btw, the 650 would be the perfect powerplant for your desired sport 4x4, as it will be more capable of overcoming the increased drivetrain power losses and turn the larger (23/22") tires through whatever required your 4wd in the first place. And it should be feasible to keep the dry weight under 450.

 

What's the peak horse on your setup?

 

Now, I respect the fact that you know alot but where did you get these numbers from? Are we talking about stock to stock? Show me some dyno's on this??

 

dunefool,

Those numbers are RWHP number variances. I had the stats in a word doc. Test done by White Bros.
It was not a dyno graph. Only stated.
The 650R was all stock other than the spark arrester core being removed. The CRF was completely stock.



I'm not trying to doubt you either, but those seem to be realistic numbers to me. Actually, I figured the SA removed from the 650 would have improved a bit more than what the test suggested.

 

But, a 650EX would be 50+ pounds heavier than a 450R! That's a pretty big handicap.......

 

650cc's at only 400lbs isnt bad at all. the raptor performed fine at that power/weight. that means it only weighs 25 lbs more then a 400ex (a little less for newer ones).