why does everyone try to throw a modified form into the question?

OBVOIOUSLY THATS NOT WHAT WAS ASKED!

I'm not doubting your bike goes 72mph

with a 14 tooth front sprocket on a full race 330 motor i was able to hit pretty fast too, never got to clock it, but it would top out about 5 bike lenghts in front a 400ex, not to mention destorying it everywhere else too!

 

54? Isn't that a little low? I could get mine to run 60mph before I did anything to it..

 

Yeah they are set up just like the 250EX with the auto tranny... they also have shaft drive and a rear drum brake. Here is what it says on Suzuki's website:

CHASSIS FEATURES:
Aggressive-styled bodywork similar to the LT-Z400 - includes high-clearance fenders, performance-inspired graphics and vertically-mounted halogen headlight.
Wide, T-shaped seat combines comfort with a functional shape that allows the rider to easily shift his/her weight.
Single 30/30W, body-mounted halogen headlight provides and exciting look and bright illumination - large 5/21W tailight/brake light combination is standard.
Rugged streel-tube frame with standard steel skid plate and tube-type bumper.
Independent double A-arm front suspension with preload-adjustable oil-damped shock absorbers - provides 6.1 inches of wheel travel for a comfortable ride over all types of terrain.
Swingarm-type rear suspension features single shock absorber with five preload adjustments and 6.1 inches of rear wheel travel, plus 8.7 inches of ground clearance.
Large 6.3 inch front disc brakes with single-piston pin-slide calipers and single cable-operated rear drum brake.
Lightweight aluminum wheels and rugged tires (F: 22x7-11, R: 20x10-9), for high style and traction under a wide variety of terrain conditions.
Serrated-type footpegs for high grip and comfort with additional built-in mudguard protection.
Convenient, 5-liter water-resistant storage box.
large 2.8 gallon fuel tank with vacuum-operated fuel petcock.
ENGINE FEATURES:

Single cylinder, SOHC, air-cooled, 4-stroke engine designed to produce a smooth, wide, usable powerband.
Cylinder head features screw/locknut valve adjustment system for simplified maintenance, plus a link-plate-type cam chain and automatic tensioner to reduce mechanical noise.
Power is enhanced by a Mikuni BSR 29mm carburetor mated to a large capacity airbox and a specially tuned exhaust system.
Convenient electric start system and CDI ignition are powered by compact maintenance-free battery with 150 watt charging system.
Five-speed transmission with automatic clutch includes an easy-to-use reverse gear system - place the transmission in neutral - turn the fender-mounted **** and depress the shift lever.
Low-maintenance shaft final-drive system is simple and reliable.

QUADSPORT® 250
Specifications
MSRP*: $3,899
Engine: 246cc, 4-stroke, single-cylinder, air-cooled, SOHC, 2-valve, TDCC
Warranty:

Bore & Stroke: 66.0 x 72mm
Compression ratio: 9.2:1
Fuel System: MikuniBSR29
Lubrication: Wet Sump
Ignition: Digital/transistorized
Starter: Electric/recoil
Transmission: 5-speed with reverse, automatic clutch
Final Drive: Shaft
Overall Length: 1720mm (67.7 in.)
Overall Width: 1065mm (41.9 in.)
Overall Height: 1135mm (44.7 in)
Seat Height: 795mm (31.3 in.)
Ground Clearance: 220mm (8.7 in.)
Wheelbase: 1135mm (44.7 in.)
Dry Weight: 166kg (366 lbs.)
Suspension:
FRONT: Independent, double A-arm, oil damped, adjustable preload, 6.1 inches of travel
REAR: Swingarm-type, oil damped, adjustable preload 6.1 inches of travel
Brakes:
FRONT: Dual hydraulic disc
REAR: Mechanical Drum
Tires:
FRONT: AT 22 x 7-11
REAR: AT 20 x 10-9
Fuel Tank Capacity: 10.6 liter (2.80 gal.)
Color: Yellow

 

Auto clutch, you still have to shift with your foot, just no hand clutching.

 

300ex going 72mph lol I have heard it all now [img]i/expressions/face-icon-small-wink.gif[/img]

 

A Z250 is not automatic it has automatic clutch..... you still have to change gears.

 

yah i agree with ozarkrider, a 300ex doing 72?????
hate to burst your bubble but, a stock 300ex will do 54-55 TOPS. that's a factual speed, i got it out of dirtwheels mag. it does depend on the wieght of the rider yes, but generally speaking. that's an accurate speed

 

what mods are on the 300ex that will make it do 72? i say it would need pipe, airfilter,cam,valves,bore+stroke,porting, taller gearing , taller tires and nobody on it with ducktape holding the throttle wide -open then maybe it will do over 65.ha ha[img]i/expressions/face-icon-small-happy.gif[/img]

 

Dirtgirl, To be honest unless you put a different engine in which case it isn't a 300ex or had your engine built with about 5000-7000 worth of mods including nitrous your 300ex isn't going to approach 70 miles an hour. It might be possible to come close to 65 MAX. That motor and tranny isn't stong enough to handle that kind of horsepower, period. These are simple facts. The 300ex was tested against a Z-250 and it lost, period! The "dated" 300ex is no match for the superior technology of the Z-250! Better luck next time!

 

Z-250 "superior technology"? Got the same setup that the old Honda utility quads have had on them for years as far as the way the engine is set up... auto clutch, driveshaft, rear cable drum brake, and aircooled to boot....

So you going to tell me that the radar gun was wrong? OK... believe what you want I don't care.... I am not getting into one of these silly arguments...

OH BTW that 72mph was full out all it had.. I never said I got it to hit that speed in 100ft or whatever. It took a couple miles to get it up to that speed..