What's a "two stroke"?!

[Chilli]

Bedroom antics aside, what is a two stroke?! Is it the same as a v twin?

Cheers.

[rsv gone!]

http://en.wikipedia.org/wiki/Two_stroke

[r5gttgaz]

Amount of strokes taken to complete the combustion cycle.

http://science.howstuffworks.com/two-stroke.htm

[Biker's Nemesis]

And as a rule of thumb, twice the power (not torque) of a four stroke.

Rough example: 500cc Four stroke twin 30bhp, 500cc Two stroke 60bhp.

That's just a rough example before anyone jumps on it.




It a bit like mono bedroom fun. Half the amount of strokes to reach full power.


HTH.

John.

[Yoda954]

Biker's Nemesis said:

It a bit like mono bedroom fun. Half the amount of strokes to reach full power.


HTH.

John.

[bimsb6]

Biker's Nemesis said:

And as a rule of thumb, twice the power (not torque) of a four stroke.

Rough example: 500cc Four stroke twin 30bhp, 500cc Two stroke 60bhp.

That's just a rough example before anyone jumps on it.




It a bit like mono bedroom fun. Half the amount of strokes to reach full power.


HTH.

John.

actually 2 strokes produce more torque than a four stroke for a given capacity . hp is derived from a torque figure


hp = torque X rpm divided by 5252 which is why torque and horsepower on a dyno readout cross at 5252 revs


http://auto.howstuffworks.com/question622.htm

Edited by bimsb6 on Thursday 27th September 10:16

[Biker's Nemesis]

bimsb6 said:

Biker's Nemesis said:

Rough example: 500cc Four stroke twin 30bhp, 500cc Two stroke 60bhp.

That's just a rough example before anyone jumps on it.

John.

actually 2 strokes produce more torque than a four stroke for a given capacity . hp is derived from a torque figure


hp = torque X rpm divided by 5252 which is why torque and horsepower on a dyno readout cross at 5252 revs


http://auto.howstuffworks.com/question622.htm

Edited by bimsb6 on Thursday 27th September 10:16

See..


Actually my brother in law pulled me up about this years ago, telling me about his Suzuki GT750.

Also my RD 400 and especially RD500 used to have the legs on the new, at the time FZR 600.

[Chilli]

Super...many thanks.

[black-k1]

bimsb6 said:

actually 2 strokes produce more torque than a four stroke for a given capacity . hp is derived from a torque figure

Factually correct though slightly misleading when considering vehicle engines.

While the peak torque of the two stroke will be greater, 'decent levels' of torque will be available over a much narrower rev range than a four stroke making it less ‘user friendly’ for engines that don’t run at a single constant speed.

[Rawwr]

[Biker's Nemesis]

Can't say I've ever stroked a grey one.












Although I have bored and stroked a few pussies in my time.

[twizellb]

Fires every 2nd stroke as opposed to every 4th stroke

[Wedg1e]

You lot are overlooking: fewer than half the moving parts and probably a third of the weight of a 4-stroke

I still prefer 4-strokes though; perhaps partly due to the mate of mine who was thrown down the A66 when the RGV250 he was riding had lube failure and seized.

[slim_boy_fat]

Chilli said:

Bedroom antics aside, what is a two stroke?! Is it the same as a v twin?

Cheers.

Seriously what's is going on with the education system these days!!!

[AndyMX5]

slim_boy_fat said:

Seriously what's is going on with the education system these days!!!

Someone of 18 would have an excuse because a lot of the 2 strokes have been replaced with slower 4 cylinders... But isn't Chilli 30 something ?


Chilli, get yourself a go on a RGV, TZR or RS250....especially on a track... you'll see the fuss then.