I have a 2 stroke motorbike, and yesterday i bought a new motorbike but its 4 stroke, whats the difference????

There is a number of difference to the 2 First the 2 stroke Requires you to mix oil and gas to keep the piston from seezing Fast on the freeway. Hard to start when cold. 4 stroke Need oil to add in the gearbox but you dont have to mix the gas with oil Easy to start when cold Requires mush less mataince to keep running. If I were to buy a new bike I would take the 2 stroke over the 4 Yes it requires more mataince to keep up but it is a lot more fun Also the 2 stroke does smoke and the 4 stroke dont

the four strok is a lot beater becouas you dont have to mix gas but if it isint twise as big in cc it is probly is not going to be as fast

fuel and emmisions efficiency amoung other things.

Two Stroke Engine http://science.howstuffworks.com/two-stroke2.htm Four Stroke Engine http://auto.howstuffworks.com/engine.htm (I know it says car engines, but it is just another form of a four stroke engine.)

two stroke makes more power per weight. smaller bikes and hand tools use 2 stroke. but it stinks, noisier, have to mix gas/oil. bigger bike can take a heavier 4 stroke engine. they're quieter, don't smell as bad, don't have to mix the gas

Here are some links that will not only explain it, but will also show you the differences.

Ok as not yet mentioned. The four stroke has a better torque output, the two stroke relies on the power band for optimum performance which means keeping the revs up and in a certain zone usually quite high. The two stroke rider really has to work those gears to attain that power output. Four strokes are not as reliant on the gear changes, and usually can take off on a higher gear, try driving off on a two stroke in second gear and it will probably stall, on a four stroke even third gear and a slight clutch feathering the bike will pull away relatively easy.The four stroke will thump along and provide more puling power and deliver gradually, this is why the ducatis are so succesful in moto gp against the two stroke rivals as the two strokes power comes in with a bang and on exit from a corner can unseat the rider, the dukes being four stroke can open the throttle earlier as the power comes on steadily progressively and smoothly. Overall though the power required by a four stroke in cc's is generaly higher than the two stroke to achieve the same maximum bhp output,

2

What kind of 2 stroke did you have and what did you buy? 2 stroke and 4 stroke have nothing to do with the number of cylinders so just forget that bad advice or whatever you call it. A detroit diesel has 8 cylinders and it's not an 8 stroke, it's a 2 stroke. Many old marine engines were v-6 2 strokes. All of todays car engines are 3 to 12 cylinders maybe still some 16's out there and they are all 4 stokes. The difference is in the internal workings of the engine. 2 stroke: one complete cycle of the piston (up and down) is considered 2 strokes and that completes intake/compression/cumbustion/exhaust in the 2 cycles or strokes. They have no valves or cams. 4 stroke: the piston completes 2 cycles (up and down two times) which makes 4 strokes to complete intake/compression/cumbustion/exhaust. It has a minimum of 2 valves and one cam. Performance engines have 4 and 5 valves and 2 cams, (talking single cylinder here) that is what makes them run like a 2 stroke on the top end. They rev much higher and faster than they used to. This is why the 2 stroke makes so much more power, because it fires twice as much and revs that much faster. They make more power but not as much torque as the 4. On the average, yes the 2 stroke will usually outperform the 4's but not on the upper end bikes. A CR250 will definately outrun and out perform an XR400 on the track but the woods is a different story. You will have people tell you that 2strokes rule and 4strokes suck. Don't listen to that. I still have a KX500 (2 stroke) bought a Husky TE510 (4 stroke). There is no way the KX will keep up with the 510. That is why I wanted the Husky. I got tired of going to the desert with the buds and their YZ450's and 426's (4 strokes) and getting blown away. I would even gear my bike up to go there and they still walk away from me at 60 mph on one wheel if they want to. It is very frustrating to be riding one of the gnarliest of monster cc dirt bikes ever made and get chewed up by a smaller 4 stroke. Now I am doing the chewing on my power for days and all over from idle to 10,000 rpm 4 stroke. I miss riding the KX but I don't think I'll ever go back. You want to buy it, I just put in a new piston and rings and went through the KIPS system, it runs better than ever and still won't hang with the Husky.