The best engine for a dirt bike, the distribution of the power is great and easy to use........unless your retarded and give a full twist of the throttle in first gear or while driving slowly (thus flipping over backwards).

You can easily tell the difference between a 2 stroke bike and a 4 stroke:

1. Two strokes have a huge pipe (expansion chamber) leading out of the engine and into the silencer.
2. two strokes sounds more like humming, while 4 strokes sound like someone shitting their pants.
3. Two stroke bikes are smaller
4. Two stroke bikes cost less to fix, and unless your stupid you can do the work yourself.
5. Overall just buy a 2 stroke bike!

One of the 3 classes in Motocross. 1. The 125 class 2. The 250 Class 3. The Open Class. Possibly the most popular class......

Basically the number means the amount of CC that the bike i supposed to have to compete in the race. But a few years ago people decided that it was alright to race 400cc 4-stroke bikes in the 250 class against 250cc 2-stroke bikes. A 250 4-stroke has no chance against a 250 2-stroke.....so i suppose this is reasonable. The first 400cc 4-strokes did really well against the 250 2-strokes and it pretty much evened thing up (powerwise)......but then the Motocross Committee did something stupid and allowed the 4-strokes 50cc more........and now the 2-strokes are really underpowered and no one races them anymore.

So basically the 250 class is now the 450 class............They should just call it the Open Class, that way we can see a 500cc 2-stroke beat the crap out of a 450 4-stroke.

primitive internal combustion engine, powered by tank of burning fossils. easily distinguishing by voluminous clouds of blue smoke. Favourite bike choice of sooky floundering bench racers complaining of fouled spark plugs and cracked reed valves, whilst prophecising the ease of the 12 "simple & inexpensive" rebuilds per annum. get an effie and learn to ride!!!

1. 4 stroke runs on straight gas, 2 stroke runs on a mix.
2. 2 strokes would be overall stronger then 4 strokes because in a race theres two classes (125 2stroke - 250 fourstroke) and (250 2 stroke - 450 4 stroke) the four strokes have to double there engine size to compete with 2 strokes.

3. 4 strokes have more useable torque, 2 stroke has a strong kicking powerband.

4. 2strokes all around are cheaper then 4 strokes.

5. 4 strokes are usually bigger.

I've ridden both 2 stroke and four stroke and i'd have to say i like 4 stroke better.

2 stroke
Good :
-alot of power
- smaller and lighter
- cheaper

Bad:
- spark plug fouling
- pre mixing gas
- not as efficient
- not as durable

4 stroke
Good:
-lots of torque
-straight gas
-more powerful
-sounds better then a shrieking 2 stroke

Bad:
-loud
-big
-expensive
-heavy

a person on a website, like youtube etc who claims that they have something brilliant.

The Kawasaki KX250F was co-developed with the Suzuki Motor Co. under their unique joint venture that started in 2002. This joint venture produced the Suzuki RMZ250 which is the mechanical twin to the KX250F but is in yellow Suzuki markings. The first year of the KX250F was 2004 and it saw immediate success in Supercross and Motocross racing capturing the Triple-Crown of Motocross ( the East/West SX championships as well as the national MX title). However, the bike had some first year issues such as cooling and ignition problems. The 2005 version rectified these problems.

For the 2006 model year, Kawasaki took its own separate route in 250F development by releasing an all new bike that had no ties with Suzuki. The 2006 model features an all new aluminum perimeter frame, a heavily revised engine, new Showa front and rear suspensions, and Renthal handlebars. The new KX was very competitive, ranking highly in motocross magazine shootouts as well as in competition. In the 2008 the KX250F has been rated the number one 250F of the year. The 2007 KX450F was the top 450cc motocrosser in its class