Confused about 2-stroke vs 4-stroke

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11/3/2017 7:44 AM

Hey all!

Next year I'm moving up to a 250. I was all set on a 250f, but I've been reading about 2-strokes and I'm now confused. There's no denying the 4-stroke is the standard now. Doing some reading, it seems like the 2-stroke has more overall horsepower than the 4 stroke. I'm looking at the KTM 250 sx-f and sx. If I'm reading it right, why do so many still say the 250f is more powerful and what you should get to be competitive in the 250 class? Obviously I'm missing something and I'm hoping I can get some help.

Let's try not to turn this into a pinching and eye-poking discussion over whether a 2-stroke or 4-stroke is better; lets face it, if it's a motocross bike, they are all great. I'm just hoping to get clarification so I can make an informed decision next year.

Thanks!

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11/3/2017 7:56 AM

this is full 4-stroke. never go full 4-stroke, bro

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11/3/2017 8:03 AM

Much TY

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11/3/2017 8:05 AM

peelout wrote:

this is full 4-stroke. never go full 4-stroke, bro

Photo

Forgot to torque those Ti sprocket bolts pinch grin

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11/3/2017 8:10 AM
Edited Date/Time: 11/3/2017 8:12 AM

*Very Large Sigh* ... Well... I thought this was obvious.. but if they're both 250's, they're equally as fast. The difference is with the two stroke, you have valves and with the 4 stroke its electric so no motor...

This should be in the electric Bikes Forum...

Edit: Let me know when you go to get rid of the YZ... I'll take it off your hands.

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11/3/2017 8:10 AM

peelout wrote:

this is full 4-stroke. never go full 4-stroke, bro

Photo

I torque my sprocket bolts every day bro!

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11/3/2017 8:20 AM

If you are a millennial I highly recommend a 4 stroke

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11/3/2017 8:21 AM

mnoble0902 wrote:

Hey all!

Next year I'm moving up to a 250. I was all set on a 250f, but I've been reading about 2-strokes and I'm now confused. There's no denying the 4-stroke is the standard now. Doing some reading, it seems like the 2-stroke has more overall horsepower than the 4 stroke. I'm looking at the KTM 250 sx-f and sx. If I'm reading it right, why do so many still say the 250f is more powerful and what you should get to be competitive in the 250 class? Obviously I'm missing something and I'm hoping I can get some help.

Let's try not to turn this into a pinching and eye-poking discussion over whether a 2-stroke or 4-stroke is better; lets face it, if it's a motocross bike, they are all great. I'm just hoping to get clarification so I can make an informed decision next year.

Thanks!

God forbid anybody give you any useful information here. Its all preference. Try to find both to ride. Maybe if a ktm has a ride day near you.

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11/3/2017 8:22 AM

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Positively, absolutely 110% obsessed with anything MOTO.

11/3/2017 8:24 AM

your HAVE to have a factory ECU if your going to be competitive

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11/3/2017 8:53 AM

The difference between a 250 2T and a 250 4T you really need to look at isn't horsepower but rather useable power and where the useable power is, IMO it all comes down to riding style, everyone has a preference but there is no clear answer as what's better IMO.

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11/3/2017 8:58 AM

FalseNeutral wrote:

If you are a millennial I highly recommend a 4 stroke

A millennial would relate to an Alta much better.

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11/3/2017 9:07 AM

Get the 4 stroke. 2 strokes are woods bikes these days. Plus if youre just moving up to big bikes the 2 stroke will feel like someone is jamming their dick up your ass.

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2009 Kawasaki KX450F
2009 Kawasaki KX250F
2002 Suzuki GSXR 600

11/3/2017 9:15 AM
Edited Date/Time: 11/3/2017 9:16 AM

FalseNeutral wrote:

If you are a millennial I highly recommend a 4 stroke

endurox wrote:

A millennial would relate to an Alta much better.

They say don't pollute the air. We say there's nothing better than the smell of 2-stroke in the morning

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11/3/2017 9:18 AM

Acidreamer wrote:

Get the 4 stroke. 2 strokes are woods bikes these days. Plus if youre just moving up to big bikes the 2 stroke will feel like someone is jamming their dick up your ass.

That's a rather awkward comment to make but I won't judge you.

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11/3/2017 9:19 AM
Edited Date/Time: 11/3/2017 9:48 AM

2 strokes are really just 1 stroke and 4 strokes are really 2 strokes.....but 1 stroke didn’t sound good!

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11/3/2017 9:22 AM

Melicar wrote:

That's a rather awkward comment to make but I won't judge you.

Welcome to Vital bud, let's party

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11/3/2017 9:23 AM

smile

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11/3/2017 10:02 AM

250f much easier for a novice - intermediate to improve track speed.

250 2 stroke if mastered has more potential to win.

Do you think RC would have caught & past Everts at Zolder on a 250f ? No chance IMO.

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11/3/2017 10:06 AM

kkawboy14 wrote:

2 strokes are really just 1 stroke and 4 strokes are really 2 strokes.....but 1 stroke didn’t sound good!

Actually a two stroke has two strokes a intake and a exhaust. Up is intake and down is exhaust. When the piston goes up it draws fuel in through the reeds. When it goes down it pushes the exhaust out and when it goes down even further it lets the intake gasses in through the intake ports. On a four stroke you have a intake, compression, fire and exhaust stroke. Intake and fire are down stroke and compression and exhaust are on the up stroke. A four stroke only fires every other revolution. A twostroke (down and up) fires every revolution. Not trying to be a dick just explaining why there called what they are.

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11/3/2017 10:07 AM

Prejump wrote:

250f much easier for a novice - intermediate to improve track speed.

250 2 stroke if mastered has more potential to win.

Do you think RC would have caught & past Everts at Zolder on a 250f ? No chance IMO.

RV destroyed the world's best on a 250f.

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11/3/2017 10:08 AM

How old are you fuckers? Millennials are pushing 40 now.
https://en.m.wikipedia.org/wiki/Millennials

Op get a 125 2 stroke. You're welcome

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11/3/2017 10:09 AM

HP is closer than say 10 years ago when a 250F pumped out 35 HP vs a 250T having 45 HP. I would say your average 250F now has around 41 HP save for the KTM/Husq which is around 43/44 HP. YZ250 = 46/47HP and KTM 250SX = 48/49 HP

From my own experience the 250T is just a handful to ride when compared to a 250F. It is definitely fun but it takes more skill/finesse as well as conditioning to go fast for an extended amount of time.

I honestly felt like I could turn a single lap on a 250 two stroke faster than a 250F, but if I needed to throw down for five straight laps I always made less mistakes and went faster on a 250F. If you ride/race frequently the skill and conditioning will come. MXA basically said the two stroke holds an advantage on the start and after that its up to the rider to pick good lines, carry momentum, and limit mistakes to beat a 250F. At the end of the day we're all just amateurs so get what you feel most comfortable on.

Honestly if you bought a used YZ250 just to try out you could get your money back out of it easy if you wanted to switch it up in a year.

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11/3/2017 10:09 AM

mxb2 wrote:

RV destroyed the world's best on a 250f.

And it was literally the coolest thing I have ever witnessed. I have some pictures of that I'll have to dig up.

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11/3/2017 10:10 AM
Edited Date/Time: 11/3/2017 10:10 AM

kkawboy14 wrote:

2 strokes are really just 1 stroke and 4 strokes are really 2 strokes.....but 1 stroke didn’t sound good!

In case youre not joking...
A stroke and revolution are not the same. 2 strokes are 1 revolution, 4 strokes are 2 revolutions.

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11/3/2017 10:12 AM

Donovan759 wrote:

And it was literally the coolest thing I have ever witnessed. I have some pictures of that I'll have to dig up.

I second that.

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11/3/2017 10:13 AM

Prejump wrote:

250f much easier for a novice - intermediate to improve track speed.

250 2 stroke if mastered has more potential to win.

Do you think RC would have caught & past Everts at Zolder on a 250f ? No chance IMO.

mxb2 wrote:

RV destroyed the world's best on a 250f.

Donovan759 wrote:

And it was literally the coolest thing I have ever witnessed. I have some pictures of that I'll have to dig up.

Yep, I was there also,. Got a badazz pic of him there. Took it to high point this year, he signed it again.

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11/3/2017 10:16 AM

mxb2 wrote:

RV destroyed the world's best on a 250f.

Donovan759 wrote:

And it was literally the coolest thing I have ever witnessed. I have some pictures of that I'll have to dig up.

mxb2 wrote:

Yep, I was there also,. Got a badazz pic of him there. Took it to high point this year, he signed it again.

Photo

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11/3/2017 10:20 AM

Love that picture dude.

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11/3/2017 10:21 AM
Edited Date/Time: 11/3/2017 10:22 AM

Prejump wrote:

250f much easier for a novice - intermediate to improve track speed.

250 2 stroke if mastered has more potential to win.

Do you think RC would have caught & past Everts at Zolder on a 250f ? No chance IMO.

mxb2 wrote:

RV destroyed the world's best on a 250f.

Sure, But that was with a holeshot or close to it. It was also on a familiar track which doesnt favor the higher horse power bikes.

The track makes a huge difference.

RC had to come from being buried in the back, in deep sand, racing overseas against the best sand rider of that era.

RC's ride far more superior IMO.



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