HI,
My little brother is looking into getting a 300ex and he wanted to know the top speed of it. If you guys could help me out and reply to my message that would be great.
thanks

 

about 55 mph.

 

If your brother is worried about speed, tell him to get a Blaster. They are faster, and about $1700 cheaper.

 

They dont want no steinkin Yamaha!

55-56mph

 

I SERIOUS DOUBT A BLASTER IS FASTER THAN A 300 EX. PLUS IT RIDES LIKE A TANK COMPAIRED TO A EX.

 

Blasters are faster than 300's, You gotta think power to weight ratio.
300ex Yamaha Blaster
-385lbs -350lbs
-242cc engine(not sure) -200cc
4-stroke 2-stroke
The power to weight ratio race would go to the blaster, even though its a entry level bike it still would beat a 300ex.

01 400ex
AC pro pegs
pro circuit exhaust
tag X5 bars

 

The displacement of the 300EX is 282cc. I had mine topped out at 57. It all depends on what mods are done. Mine has no mods to the engine or drive train. I have aftermarket tires, which probably made the difference. Bunch of other mods, but none to the engine.......yet. (330 kit)

 

A 300EX in totally stock form won't touch 55 on radar or GPS. ATV Action did a sport quad shootout in 2000 and the EX hit 52. (Blaster did 54)

 

Wait a minute... power to weight ratio has next to NOTHING to do with top speed. Power:weight is only important when dealing with acceleration and cornering. A lighter ATV will corner quicker than a heavier one (in most cases: some setups, tires, suspension types, among other things will have an effect on this), because it has less mass to change direction. A heavier quad is more likely to understeer (or roll over) and keep right on going the way it was going.
Likewise, a lighter quad will accelerate quicker than a heavier one, because it has less mass to get moving. Its all physics. An object at rest/in motion will tend to stay in that state unless acted upon by an unequal force. The more mass the object has, the more force required to change its state of motion (or lack thereof).
At extreme speeds, 200+ mph (obviously I'm not talking about 4-wheelers anymore), more weight will actually HELP the vehicle gain more speed (or simply retain it's current speed), because the vehicle will have more forward momentum, and therefore will have more force pushing against the wind resistance. However, I don't think that ATVs reach speeds that are high enough to see the effects of this.

 

are you crazy? your telling me power/weight ratio has nothing to do with the top speed? what kind of crack are you on? A lighter bike with more power would kill a heavier with less power in a top speed race. your just ignorant for even thinking it wouldn't.

01 400ex
pro circuit T4 exaust
ac pro pegs
tag X5 bars