Maintenance & Technical > KX450F / KX250F
New Thumper
NastyNick:
My kid just picked his 04 KX250f up from the dealer here on Friday. I read the other threads on the pricing problems and we didn't see it at the dealer up here (in Montana). They sold 4 of them this past week, all for around $5,400.
I can't wait to give it a try. I'll post here my impressions after I give it a shot. Too bad the day he picked it up it dumped 2 feet of the cold wet white stuff and has been snowing on and off ever since.
If the kx450f is anything like the 250, thats what i will be getting....not that I will ever get rid of the kx5 :)
NastyNick:
thanks for the Private Message manny.
Hehe...my kid is the one that bought the kx250f. I'll show him this post. He did buy a FMF Factory 4 for it (against my urging). Why do you say not to waste any money on a new pipe? The rags out there say (for the most part) that for the money, thats what will put the 250f in the same power league as the honda and yamaha 250 4 strokers.
He is already saving his pennies for the 2-piece cover (probably pro-circuit, but is leaning towards the boysen).
Where would he get a "1.6" rad cap, and what is it?
Break In Story:
First day out on it after running the "break-in" process (1/2 throttle for 20 minutes, 3/4 throttle for 40 minutes, change oil filter/oil/rad fluid) he actually BROKE it in. Did an endo off a jump, bent the bars, crushed the left foot-peg, and scratched the hell out of the right side plastic. Other than that, no damage to the bike. He, on the other hand, broke is left collar bone, dislocated his right thumb, bunged up his right knee and a mild concussion on top. No riding for at least 6 weeks.
On a high note, I got to ride it after his mom took him to the hospital and it was a blast. This was my first experience on a thumper. Loads of power (kind of like the k5) from the bottom through the top. Very light to what I am used to and handles like a dream. I didn't do any major jumping (thats saved for after he needs new bars, doh!), but when I get on it, it freakin goes. I think that was why he wrecked it. On his 125, you have to keep on it just to keep it in the powerband. The tumper, just crack the throttle a bit and it moves. He came around a corner in first, poured it on and by the time he hit the table top, he was in 4th gear and didn;t think he was going as fast as he was.
Anyway, thanks for the advise manny. I'll be sure to show the kid.
NN
--- Quote ---
from manny:
1. Don't waste a single $ on a pipe.
2. "1.6" Radiator cap.
3. 2-Piece Oil Filter/Pump-Cover. Muzzys or Pro-Circuit. Only buy from someone who will ship same-day...hint.
4. RADIATOR Gaurds from Works Connection($59...they protect $400 Radiators...)
5. Don't waste $ on a pipe.
6. Change fork-oil after 10 hours.
7. Don't waste $ on a pipe.
8. Twin-Air "Flame-Proof" Filter kit/Remove Back-Fire Screen.
9. DON'T WASTE $$$$ ON A PIPE!
10. If you HAVE TO HAVE A d**n PIPE! Get one with a Spark-Arrestor that's "Removable". "Slip-On" at that. There are only TWO "head pipes" that're worth a d**n and only -1- of them is readily available (Pro-Circuit). There are a couple of other brands that have some really good pipes comin'...a hint...I get to test them...
11. I'll get the P/N for the Needle that makes these things perfect.
12. Don't let the radiators OR(!) the Engine get "Caked" with mud. Overheating these things is NOT GOOD.
13. S-H-I-F-T! Don't wait for the Rev-Limiter to kick in...at about 100-200 rpm's before the limiter, the ignition retards about 14 degrees, once again, NOT A GOOD THING...doesn't help the motor stay cool. Oh, and yes...Ivan's motor DOES have a different ignition...something like it may be available soon from Muzzys.
These things are trick! They're kinda "Sensative"...just like a works bike!
Learn to ride it. It's different...kinda like a Super KDX220 motor in a KX 125SR (Works) Chassis with a "Sweet-Spot" in the power-band that requires you to keep it in the right gear.
Bubba will race it when he learns to stop stalling it/hot-start it!
Go have fun and ...don't waste your $ on a pipe
--- End quote ---
teamgreen500:
Why "No" on the pipe?
For the "Average Rider" the stock bike puts it's power to the ground BETTER than the Blue and Red bikes. PERIOD. Remember, most of the magazine guys are doing "Hole-Shot" contests at LACR or Corona; Whereas your kid isn't. I've riden a lot of these things with A LOT of different pipes.
Changing the needle and adjusting the air screw is where the Power is at, not ot mention...Improved acceleration. Starting, too.
The "1.6" Cap is a 40% higher pressure rated radiator cap that doesn't let all your coolant blow out as easily (Too Easily) as the stocker. I think that they're stock on some Hondas or something. Your dealer should know.
BTW, the average racer can save a lot of money on doo-dads and get MUCH better starts by practicing his starts/technique. Heck, just don't stare at the gate and you'll get a better start. Use your peripheral (sp?) vision by looking at the ground about 10 feet in front of the gate and see how fast you respond compared to staring at the gate. When you stare at the gate you actually WATCH it fall and THEN your brain responds to it. When using your periphery, you respond to the motion of the gate, as it's FALLING!, almost immediately. You are actually using the same senses that cause you to be "startled"...as in "Fast Twitch".
Setting proper Static and Dynamic sag are real contributors to Hole-Shots, too.
How much faster would a rider be if he:
Spent $500 on Doo-Dads...OR...he spent $500 on a Weekend Seminar with Marty Smith?
Heck, I've got a neighbor harrasing other kids on his KLX110...and the other kids are on YZ and CR 80s!
I say,"Jet it, Take REAL good CARE of it, Do the Filter Trick and learn to ride faster". I'm of this opinion since seeing Bubba absolutely FLY on a Bone Stocker!
Manny
Paul:
Manny, if it fits... the 1.6 is stock on the KX500
teamgreen500:
DOH!-I just run what's on there. Yes, I'm an idiot. I think I spend to much time on those lil' Thumpers!
Manny
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