Devon TRF Group Forum

If your falling off all day a 2 stroke will be a LOT lighter after the third time of picking up 

2 strokes are easier to fix plus cheaper on internal parts as there are fewer 

As jaffa has already said a lot zippier than a 4 stroke which is ideal for events although i have seen many a top rider use both but then its a case for horses for courses 

But for a few lanes i reckon you'd be hard pushed to find the ktm 250 4 stroke near the top choice  

when i'm in the senior section of the DTRF i might have to consider a lower c.c. + lighter machine    ktm 250 will be high on the list 

Later wacky  

delvey91 wrote:

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Reed valves mine snappped today!

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 how do you tell when you snap a reed valve?

ok ? my turn the 250 4T ktm puts down soft power low down as you would amagine is very handy in slippery conditions it also has a very healthy top end for a 250 4T revs to 13000-14000 rpm and is easy to manhandle due to the soft nature of the motor compared to some 2T engines
But hang on a minate you say you ride a ktm 2T 250 they do produce more ummph but the the ktm engine can be altered in the way it delivers its power ?have you left it standerd ? how has it been set up poss for a expert ? altering the tension on the power valve can turn your beasty into a pussy cat ? ktm supple three diff springs i beleave the red one is the stiffest giveing the bike more bottom end to play with ? before the power valve opens
how are you rideing the bike sorry if this sound condersending a T2 will lug in second gear and not stall or should i say a four stroke will stall if your not in the right gear ? and this is because for every two rotations of the crank a four stroke ignities its fuel in the combustion chamber once its a four stroke compared to two rotations and twice of the T2 engine plus there is less enersure, enersure adds weight to a bike ? when the engine is running it is less with a two stroke engine

So bottom line both engines do the same job in diff ways the T2 over a T4 is that you are able very cheaply to alter a T2 as your skill level increases the T4 tech can be more novis freindly to start out on and there shouldnt be any surprises ,The T2 surprise comes when your up a steep rocky/slippery lane your knackerd crossed up feet flailling sweeting like a pig and you open that throttle in desperation and the bike goes BAAAAAAAAAAAAR and carries you up and over when you thought all was lost cheers LOST



still mixeing two stroke oil on a run can be a pain sometimes

Gasgas23 wrote:

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Is this on the intake to the cyclinder? 

So would be the v force system on mine?

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 Yep

Biff

Lost wrote:

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ok ? my turn the 250 4T ktm puts down soft power low down as you would amagine is very handy in slippery conditions it also has a very healthy top end for a 250 4T revs to 13000-14000 rpm and is easy to manhandle due to the soft nature of the motor compared to some 2T engines
But hang on a minate you say you ride a ktm 2T 250 they do produce more ummph but the the ktm engine can be altered in the way it delivers its power ?have you left it standerd ? how has it been set up poss for a expert ? altering the tension on the power valve can turn your beasty into a pussy cat ? ktm supple three diff springs i beleave the red one is the stiffest giveing the bike more bottom end to play with ? before the power valve opens
how are you rideing the bike sorry if this sound condersending a T2 will lug in second gear and not stall or should i say a four stroke will stall if your not in the right gear ? and this is because for every two rotations of the crank a four stroke ignities its fuel in the combustion chamber once its a four stroke compared to two rotations and twice of the T2 engine plus there is less enersure, enersure adds weight to a bike ? when the engine is running it is less with a two stroke engine

So bottom line both engines do the same job in diff ways the T2 over a T4 is that you are able very cheaply to alter a T2 as your skill level increases the T4 tech can be more novis freindly to start out on and there shouldnt be any surprises ,The T2 surprise comes when your up a steep rocky/slippery lane your knackerd crossed up feet flailling sweeting like a pig and you open that throttle in desperation and the bike goes BAAAAAAAAAAAAR and carries you up and over when you thought all was lost cheers LOST



still mixeing two stroke oil on a run can be a pain sometimes


Yes my 250 2t has been set up by a much better rider than i.

Harder springs both ends, full fmf system, rejetted, v force 3 reed system, gpr steering stablizer, and the softest powervalve spring and the ignition on full power.

With the powervalve springs the green is the hardest (so makes it a bit smoother) Yellow is the standered one and a bit softer than the green and the red is the softest so opens the valve earlyer.

I have played around with these and i find the red the best for me. I didnt like the green. i had to ride it like the 250 4t and wring its neck in order to feel like i was moving quick enough.

I was really amazed how planted the 2504t was an how much easyer i found it to ride and how less tired i was.  But i didnt really like how much i had to pin it to get it to move quick.

 

-- Edited by Lost on Monday 11th of June 2012 09:39:52 AM

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doug9270 wrote:

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Gasgas23 wrote:

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I ride a KTM 250 2t. I think it is a fantastic bike but i had a decent go on a friends KTM 250 4t today. I know it doesnt have the power of mine but my god it was so easy to ride! Not tiring and i didnt get any hand pain or arm pump like i do on mine, and it just seeme real easy to go fast and never felt out of control even when i wacked the throttle open mid corner to test it.

 

 If you are getting hand pain and arm pump up then you need to adjust your riding/bar position. Also if your suspension is setup for expert racing standard (hard) then this will also give you arm pump up as you are having to grip to hard to stay in control.

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 Ah ok, what should i change to make it a bit softer?? i have thought about this before but i do jump a fair bit and didnt want to make it too soft and damage it.  any suggestions?

Lost wrote:

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im ave if you want a hand on setting the katoom sus up rideing position etc give me a ring 01626865862 lost kerry? im in dawlish should take no more than half hour ?approx
alternative buy the ktm350xcf or exc i have one if you want ago lol

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 will you be going to the cotton farm event??

L'orange wrote:

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loose so much control. why would you want to make life more difficult?

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 More fun?

Well ill be at the cotton farm event if anyone has anytips to help me!  and Lost if your bringing your 350 id love to have a good look at one!!