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What's with the 2t obsession?

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Ravo
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PostPosted: 18:25 - 29 Nov 2007    Post subject: What's with the 2t obsession? Reply with quote

2 Stroke engines are less efficient, dont' last as long, smell funny, burn oil, and sound like deep voiced screaming crack babies when you rev them. So why does everyone love them so much?
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rpg
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PostPosted: 18:29 - 29 Nov 2007    Post subject: Reply with quote

i guess the powerband of a highy tuned 2 stroke is unbeatable. Maybe people who enjoy hands on approaches to engines like them too. I have a lambretta-nothing beats the smell of that 1960s 2 stroke! Very Happy
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veeeffarr
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PostPosted: 18:29 - 29 Nov 2007    Post subject: Reply with quote

How is an engine that makes double the power of the equivalent sized 4 stroke inefficient?
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GazzaThePiagg...
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PostPosted: 18:30 - 29 Nov 2007    Post subject: Reply with quote

rpg wrote:
i guess the powerband of a highy tuned 2 stroke is unbeatable. Maybe people who enjoy hands on approaches to engines like them too. I have a lambretta-nothing beats the smell of that 1960s 2 stroke! Very Happy


Whats wrong with buying a custom powerband for a 4t? Quite easy to attach.
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daz_d_biker
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PostPosted: 18:42 - 29 Nov 2007    Post subject: Reply with quote

Rev higher, smell awsome, faster, easier to work on... You would NOT hate two strokes if you've ridden an RD500/RG500. I just love the powerband- no power... no power...no power... POWER!!!! I'm not saying i hate 4t's, as i have a few.

Daz.
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St0rmer66
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PostPosted: 18:49 - 29 Nov 2007    Post subject: Reply with quote

rpg wrote:
i guess the powerband of a highy tuned 2 stroke is unbeatable. Maybe people who enjoy hands on approaches to engines like them too. I have a lambretta-nothing beats the smell of that 1960s 2 stroke! Very Happy

An old looking scooter went past me today (I was in a cage) so I wound the window down to have a sniff! Shifty
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G
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PostPosted: 18:49 - 29 Nov 2007    Post subject: Reply with quote

Quote:
2 Stroke engines are less efficient, dont' last as long, smell funny, burn oil, and sound like deep voiced screaming crack babies when you rev them.

4 strokes are less efficient as far as power per cc goes, similarly tuned ones have much worse service intervals, cost more to rebuild, don't smell nice, are heavy and sound like a wet fart. So why does everyone love them so much? Wink

I do like the revvy kick you get from a sports orientated 2 stroke.

In the trail-riding world, 2 strokes with similar power tend to be around 10% lighter than their 4 stroke equivalents.

As far as 125s go, they make a lot more power and are massively more reliable than a 4 stroke would be if you tuned it to that power output.

daz_d_biker wrote:
Rev higher, smell awsome, faster, easier to work on... You would NOT hate two strokes if you've ridden an RD500/RG500. I just love the powerband- no power... no power...no power... POWER!!!! I'm not saying i hate 4t's, as i have a few.

I haven't ridden the big RD/RGs, but don't really quite see the fascination - at least something like an RS250 has an area where it's a fair bit ahead of any 4 stroke bike (weight).

Think generally 4 strokes rev higher, at least when comparing similar bikes - just because they have to, to get half decent power out.
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UnknownStuntm...
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PostPosted: 18:52 - 29 Nov 2007    Post subject: Reply with quote

Can I ask a painfully stupid-sounding question?

Why are they referred to as 4t and 2t? The 't', what's the 't' mean?!!
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306_abb
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PostPosted: 19:08 - 29 Nov 2007    Post subject: Reply with quote

Quote:
Can I ask a painfully stupid-sounding question?

Why are they referred to as 4t and 2t? The 't', what's the 't' mean?!!



You are not alone i was thinking the same thing you would of thort it would have been an S not a T
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veeeffarr
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PostPosted: 19:29 - 29 Nov 2007    Post subject: Reply with quote

306_abb wrote:
Quote:
Can I ask a painfully stupid-sounding question?

Why are they referred to as 4t and 2t? The 't', what's the 't' mean?!!



You are not alone i was thinking the same thing you would of thort it would have been an S not a T


Who says it's an english word? Wink
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Kickstart
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PostPosted: 19:31 - 29 Nov 2007    Post subject: Re: What's with the 2t obsession? Reply with quote

Ravo wrote:
2 Stroke engines are less efficient, dont' last as long, smell funny, burn oil, and sound like deep voiced screaming crack babies when you rev them. So why does everyone love them so much?


Less efficient at fuel consumption maybe, more efficient at turning fuel into useful torque quickly. Compared to a 4 stroke there are barely any moving parts so they can be rebuilt easily and cheaply, and a 4 stroke of the sama capacity with even close to the same power output would last a far shorter time. Sound is just a waste product, but personally I prefer the sound of a 2 stroke to the diesel like slow plod of a 4 stroke.

Best thing is though that they feel like they want to be thrashed. They encourage it. Unlike a typical 4 stroke that just seems to endure it.

The T is short for "tempi" I think. Italian (and possibly latin).

All the best

Keith
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fazza59
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PostPosted: 19:44 - 29 Nov 2007    Post subject: Re: What's with the 2t obsession? Reply with quote

Kickstart wrote:


The T is short for "tempi" I think. Italian (and possibly latin).

All the best

Keith


Spot on, the word "tempi" means "time" in Italian.

Just loved my Mito, only 125cc but like shit of a shovel when it hit the power valve at 7,500 revs.

Don't like the vibration so much, some might! Shocked
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Andy C
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PostPosted: 19:47 - 29 Nov 2007    Post subject: Reply with quote

When i had a RS125 the smell on a winter morning of it warming up was amazing, and although they sound not great going past when your on one i think they sound amazing.

Toby R wrote:
How is an engine that makes double the power of the equivalent sized 4 stroke inefficient?


Due to friction and poor scavaging of the exhaust gases its more likely to be 10-40% in most two stroke engines.
*feels smugs after just completing a project for uni on the two stroke engine*
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Fahd
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PostPosted: 19:57 - 29 Nov 2007    Post subject: Reply with quote

Andy C wrote:
When i had a RS125 the smell on a winter morning of it warming up was amazing, and although they sound not great going past when your on one i think they sound amazing.

Toby R wrote:
How is an engine that makes double the power of the equivalent sized 4 stroke inefficient?


Due to friction and poor scavaging of the exhaust gases its more likely to be 10-40% in most two stroke engines.
*feels smugs after just completing a project for uni on the two stroke engine*


I totally agree Andy C, the sound you hear when you're throttling the hell out of the RS125's is actually amazing in my opinion, it really makes you feel like the bike is working hard for you, then agin I may only be saying this because the loudness makes me feel like an adequate rider... Shifty

My advice to the original poster would be to have a go on a high performance 2 stroke bike and see for himself... Thumbs Up
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ncrn
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PostPosted: 20:54 - 29 Nov 2007    Post subject: Re: What's with the 2t obsession? Reply with quote

Ravo wrote:
2 Stroke engines are less efficient, dont' last as long, smell funny, burn oil, and sound like deep voiced screaming crack babies when you rev them. So why does everyone love them so much?


Have you ever ridden one? If not ride one and you'll probably work it out Wink.
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mr jamez
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PostPosted: 21:00 - 29 Nov 2007    Post subject: Reply with quote

Niiiinnnggg DIIIIIINNGGG PWAHHHHHHHHHHHHHHHHHHH!!!

That is why people love them, K?
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LeeWat
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PostPosted: 21:24 - 29 Nov 2007    Post subject: Reply with quote

I loved my MkII RD125LC about 12bhp (probably less) and 65-70mph as standard but fettled was a monster (to me at 18 it was anyway). Good ringgyding sound from the allspeed pipe, that loverly smell of 2 stoke oil burning away and so easy to work on the engine, no mechanical valves to set just get the rat tailed file in there to smooth out the wrinkles, arms feeling like they were about to pop out of their sockets when i reached 6000rpm.....makes me want to go back 18 years Smile I remember peering through the local bike shop window drooling at the two RG500's in there wishing i was rich or had a job that payed more than 40 quid a week......ahhh the times we had that bike and i.....
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mattish
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PostPosted: 21:47 - 29 Nov 2007    Post subject: Reply with quote

I missed the whole 2t thing as I never had a ped and went from a cb125 to a fzr600. Time for a change so I have now just bought a rd350lc ypvs. I cant wait to get it on the road Very Happy
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UnknownStuntm...
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PostPosted: 21:59 - 29 Nov 2007    Post subject: Reply with quote

Well having only come to two wheels lately, I can only comment on 2 stroke karts. I have driven (piloted?) them on quite a few occasions and found it to be the best way to grin EVER! It just seems like you 'chase' the revs up the scale. You wind it on a bit, the fueling catches up, then you wind it on a bit more and so on. Like you need to feather the throttle to fall in the sweet spot in the rev range...

And they just don't stop revving either, which is frankly NUTS. Mr. Green

I would shit myself on a 250 2stroke bike. But I'd do it in a blink. Laughing
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stinkwheel
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PostPosted: 22:10 - 29 Nov 2007    Post subject: Reply with quote

mattish wrote:
I missed the whole 2t thing as I never had a ped and went from a cb125 to a fzr600. Time for a change so I have now just bought a rd350lc ypvs. I cant wait to get it on the road Very Happy


Those things should be illegal.

Giz a shotty mister.
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The Tot
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PostPosted: 22:21 - 29 Nov 2007    Post subject: Reply with quote

I always assumed that the t stood for takt, tak, tag, meaning time, timing (as in cycles) - dutch, german etc, hence why we call em 2 tak (dua tak) in indonesa. The italian/latin permutation is the most logical.
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strag
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PostPosted: 22:31 - 29 Nov 2007    Post subject: Reply with quote

My project bike Smile Has now been resprayed (black of course) and is awaiting its rebuilt engine to be fitted...

https://i218.photobucket.com/albums/cc208/stragster/100_0516Custom.jpg
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stinkwheel
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PostPosted: 22:46 - 29 Nov 2007    Post subject: Reply with quote

UnknownStuntman wrote:
It just seems like you 'chase' the revs up the scale. You wind it on a bit, the fueling catches up, then you wind it on a bit more and so on. Like you need to feather the throttle to fall in the sweet spot in the rev range...

And they just don't stop revving either, which is frankly NUTS. Mr. Green


Maybe tuned differently to the bikes then. A performance two stroke bike will bog, stutter and fart at low revs. Then they gradually climb pulling you along at an increasingly rapid rate but lagging behind the throttle as you describe with the karts.

Then they all of a sudden go absolutely apeshit, the tacho needle bounces to the redline in the blink of an eye and either catapults you forward, does a wheelie or both. Once you hit that, you can't change gear quickly enough to keep up with it.

Note on the following video how the bike wheelies at the very top of the rev range. This is the bike not the rider. The rider will be trying to hold it down.
https://www.youtube.com/watch?v=SARVvPck5tA
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