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Post Info TOPIC: Why do 4 strokes get more traction than 2 strokes??


Clubman B

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Why do 4 strokes get more traction than 2 strokes??


RE: Why do 4 strokes get more traction than 2 strokes?? Why do 2 strokes have less traction than 4strokes?? Is it the same answer? Can't ride a 4strike like a two strike does it apply?? Confused in waterlogged stoford aged 48

-- Edited by Dirk Diggler on Sunday 23rd of December 2012 11:39:07 PM

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Clubman B

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im sure its to do with the power delivery,   

but i set up my 250 2 stroke with a gnarley pipe, stiffest power valve spring, wound the other bit on the power valve in to make it as smooth as possible,

 

yet went out with my brother on his klx 300r and we swapped around with the bikes and his gets so much more traction on flat corners and i immediatly feel faster on it and more in control,    and we both felt that mine was still very jittery and hard to get a good balance of traction and speed.

 

any ideas???



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Clubman B

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are you both running same tyres and pressures 



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Expert

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Because it fires at twice the rate

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Devon's Best

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You need to ride your 2 stroke like a 2 stroke and not try and make it a 4 stroke. it just wont work

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Clubman B

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markt270 wrote:

are you both running same tyres and pressures 


 yer ran the same pressures front and back



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Clubman B

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delvey91 wrote:

You need to ride your 2 stroke like a 2 stroke and not try and make it a 4 stroke. it just wont work


 How do you mean??  keep it in a lower gear with the revs higher??



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Clubman B

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Gasgas23 wrote:
delvey91 wrote:

You need to ride your 2 stroke like a 2 stroke and not try and make it a 4 stroke. it just wont work


 How do you mean??  keep it in a lower gear with the revs higher??


Yes, I used to find if i kept my 200 reving past the typical 2 stroke "snap" it was alot easier to ride. Thirsty though.



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Devon's Best

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DanN1664 wrote:
Gasgas23 wrote:
delvey91 wrote:

You need to ride your 2 stroke like a 2 stroke and not try and make it a 4 stroke. it just wont work


 How do you mean??  keep it in a lower gear with the revs higher??


Yes, I used to find if i kept my 200 reving past the typical 2 stroke "snap" it was alot easier to ride. Thirsty though.


 Reckon he means rev the t*ts of itwink



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Clubman B

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Also the klx 300r is very good at traction because it is not so highly tuned as most other four stroke enduros.If you compared your bike against a wr250 you would probably find  traction is closer.  



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Clubman B

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russell11031967 wrote:
DanN1664 wrote:
Gasgas23 wrote:
delvey91 wrote:

You need to ride your 2 stroke like a 2 stroke and not try and make it a 4 stroke. it just wont work


 How do you mean??  keep it in a lower gear with the revs higher??


Yes, I used to find if i kept my 200 reving past the typical 2 stroke "snap" it was alot easier to ride. Thirsty though.


 Reckon he means rev the t*ts of itwink


 Ahhh  ok   il try keeping the revs higher



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Clubman B

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Get a 2T 300, end off.

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Clubman B

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Ads wrote:

Get a 2T 300, end off.


 not if you dont want to ride the open class



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Clubman A

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Na. Wasn't giving out Gibbs number. Thinking Brokenlegs aka mark . Local tuners haven't made my forks feel as nice as the do now. Gibbs do tune a motor to perfection tho.

-- Edited by Vikings on Monday 24th of December 2012 12:47:55 PM

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Clubman B

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My 300 has huge amounts of low down grunt. It will pull cleanly from no revs at all.

Plus its alot less likely to cough stall - that famous 4 stroke "phut". Something to do with a power stroke every turn of the crank, I think.
Took a while to learn to trust it, but it finds grip in places my old 4 stroke would struggle.

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Monty wrote:

Took a while to learn to trust it, but it finds grip in places my old 4 stroke would struggle.


 Ditto - my 2t katoom will go places my TTR would run away and hide at the thought of - my MT 43 'tester lane' that many who have been on my runs will know wink proves the point as have seen many 4t's flounder while the KTM & Dougs 2t Husky 'float' up......

Depends on loads of things IMO - tyres, sus, rider, terrain - I find 4T's much 'easier' to ride and maybe that gives more confidence and a feeling of more traction? - I dunno but I do know I can get places on my 2T I would never have got on my old TTR - but its not just cause its 4T v 2T.



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Clubman A

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IMHO i think that the suspension setup plays as as much of a role in performance as the engine. Traction is especially dependant upon the compression and rebound settings and having the right amount of static sag.

Have a look at what the handbook states for your basic settings and start from there. A few changes  can make a massive difference to how the bike rides and feels.

Race Tcch's " motorcycle suspension bible"  has some top explanations and tips for tuning  if you are interested. Turned my bike from a tiring ride into a real pleasure. All I need to do now is learn how to ride properly biggrin

Mike



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Clubman A

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It's all about sus set up. Without fail a well set up bike will just work better. I miss the instant massive grunt from my 450 but the 2t 250 is a much better all rounder. But it's all about your set up. Spend some money having it sorted at a Propper tuner rather than someone who just bounces it up and down. And for god sake don't let a wannabe set it up. Pm me for the best guy I've found for set ups. Makes so much difference.

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Expert

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I've often thought about getting by suss set up professionally to see the difference. I think if I was doing this I'd probably take it to Mr Gibbs at Saltash - unless you guys know of equally good professional people??

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Clubman A

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I think there was a reference to 'gibbs' in 'vikings' post and I'm sure he won't need to pm you his number if you know what I mean

Set up is everything on whatever bike you ride, the just get on and ride it attitude that so many have is all wrong as with a little time and effort you can have a much more enjoyable ride. That goes for the engine and the suspension. So many people spend money trying to go faster on there 450's by adding exhausts and bolt on bling when half the money spent on set up would give twice the return in speed.

Going back to the original question about traction on a 2t vs 4t, a well set up 2t ridden correctly will actually provide as much if not more traction as a 4t. The thing is takes less skill to find the traction on a 4t.
The 250 EXC in question has a great engine which can be lugged in almost any gear, the way to find the most amount of grip is to pull a higher gear than you would initially think, feeding the power in steadily.

The high revving method that some use is not overly effective but it does sound like your going fast. You can see proof of this at any enduro, the experts are flying through at fairly low revs in a controlled manor, the further you go down the classes the higher the revs become,the more ragged they look and the slower they actually go.

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Clubman B

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A a rider of a 300 2t, Wardy you are bang on mate.

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Devon's Best

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wardy wrote:

I think there was a reference to 'gibbs' in 'vikings' post and I'm sure he won't need to pm you his number if you know what I mean

Set up is everything on whatever bike you ride, the just get on and ride it attitude that so many have is all wrong as with a little time and effort you can have a much more enjoyable ride. That goes for the engine and the suspension. So many people spend money trying to go faster on there 450's by adding exhausts and bolt on bling when half the money spent on set up would give twice the return in speed.

Going back to the original question about traction on a 2t vs 4t, a well set up 2t ridden correctly will actually provide as much if not more traction as a 4t. The thing is takes less skill to find the traction on a 4t.
The 250 EXC in question has a great engine which can be lugged in almost any gear, the way to find the most amount of grip is to pull a higher gear than you would initially think, feeding the power in steadily.

The high revving method that some use is not overly effective but it does sound like your going fast. You can see proof of this at any enduro, the experts are flying through at fairly low revs in a controlled manor, the further you go down the classes the higher the revs become,the more ragged they look and the slower they actually go.


peter wrote:


A a rider of a 300 2t, Wardy you are bang on mate.


 

 Just so.

Feeling lazy - take the four stroke for an easy ride.

Feel adventurous - take the two stroke and enjoy the rewards of being that much more involved in the process.

Ridden like a four stroke the two will fail to deliver, but can excel when the rider knows how and is prepared to work with the bike.

Suspension can make a huge difference, but in the real world, away from the race track a minority use, most riders will not go fast enough to find out.
Poorly set up suspension can make a bike a pain to ride though so if your seat feels like a board although the bike floats over whoops at high speed you will have to decide whether to set it up for every day riding, or however many minutes plus two laps by trading comfort for precise handling.
Progressive suspension these days oh so very nearly achieves the holy grail of working well on and off road and most have sufficient adjustment available to tweak according to your needs.



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