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I'm back down to a 250F and loving it and feeling way safer now. Am looking for a 250 smoker as well. I'll leave the 450's to the professionals....and I highly doubt that most "ham and egg" moto-x week end warriors truly wick a 450 to even a small % of its full potential. It is exhilarating, but can also lead to disaster pretty quickly.
And secondly, the definition of wide open, as others have said, you may be twisted to the stop for brief periods of time, but the engine is under a load and rarely reaches peak rpm. If it does, the motor is no longer "pulling". Most decent riders, (and anybody with the talent of a pro rider) is going to grab another gear before this happens.
Wondering out loud with my hands in the air (like I just don't care) - if Dr. Doug
has ever seen me wring out my XR-80 on the pee-wee track at Briarcliff !
Sayin'.....
The Shop
Many here have made good sense and I agree, you can bang wide open throttle but that doesn't mean you revved it to the limiter. The relevance seems futile.
However,when it comes to play riding or sand dunes ,trails with big hill climbs etc..
A 125 or 250F wont cut it at times.
Any bike that is held wide open LOSES power, since the power tails off at the highest RPMs. Most people, especially fast guys, are grabbing another gear and not just holding it wide open. If you are banging off the rev-limiter on a straight or uphill, you aren't riding effectively. A guy like Barcia either is in the air or has the clutch in when he is hitting the limiter, and it is more of a habit for him than an effective riding technique. A lot of goons ride around wide open, but in the wrong gear and going nowhere fast.
For those that are saying they ride wide open all the time, you're saying you go fast and tear it up....and if you are doing that you are very likely not wide open much at all.
F1 teams, the MotoGP guys, and even the NASCAR chiefs have been saying the same thing for years now. 100% throttle opening is a rare occurance.
Those of you saying you're finding the throttle stop quite frequently - yes, you probably are. However, how long do you hold it there and how many times? Say you hit it about 8 times a lap on your average outdoors track (which would be doing pretty good). Of those 8 times that you're hitting the stop, you're there for about 3 seconds on that big uphill or nice long straight. You're there for 1 second on a few small straights, and less than a second four or five times times elsewhere. Does that make sense?
So yes, you're hitting the stop "frequently," however you're only spending about 8 seconds there (which, again, is probably about a local B to A class level on the average track). Now you're looking at 2+ minute lap times. What percentage of the time are you at the stop?
Now the pros probably spend about double that on a national track, but you get what I'm saying.
No, there's no such thing as a throttle stop sensor, but there is a throttle position sensor, and I think if you've got the link to your EFI setup so that you can look on a laptop, you'll find what Doug's talking about to be true.
"The Honda CR250R of Ricky Carmichael had an external solenoid affixed to the cylinder’s electronic powervalve cover. Apparently, the device was part of an elaborate data acquisition system, which monitors throttle position throughout the moto. Ever listen to one of your buddies talk about how he was “wide open” in a certain section? Well, systems like this usually show that riders are rarely wide open, if ever. But what about RC? According to Ernesto Fonseca’s mechanic Kenny Germain, the race team was shocked to find at one of their outdoor tests, RC was wide open an unbelievable 98% of the time! "
10-13-2003
http://motocross.transworld.net/1000015091/features/monday-kickstart-us…
The point to take from this:
If everyone's designing Pipes, etc...to a Dyno-chart for "Peak Performance" gains, well, that DOES NOT mean ANYTHING in the real World...for most riders...AT THE TRACK.
Usable Power, Acceleration, Throttle Response and Torque are what you hear Doug talking about.
He's Brutally Honest.
No wonder he's been a Test-Rider - R&D Contributor at Yamaha for sooooooooo long.
With the 125's, I could imagine a TPS being 100% frequently, maybe 50% of the time. A 250 much less & almost nill on the current 450's.
Pit Row
"What Graphics for my 2011 CRF450? I'm going Pro!"
Laughed out load so hard spit came out.
Full moto-pro-sick-ass-SX!
We've even got a DOUBLE JUMP, YO!
Sick! I'm gonna run the Brand-X energy-drink FMX Disco-Ball look, too!
I've got the Loudest-assed-Sick-Pipe, TOO!
That was the story, whether you buy it or not.
Post a reply to: Dubach dispels the wide open myth