Maintenance & Technical > KX450F / KX250F

KX450F vs. KX500

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azracer19:
well we do see a slew of KTM 2Ts   make you wonder

dsrtrider:
Lets say there was a parallel universe where 2 strokes (250 and 500) were still around and there were no 4 strokes.  The 500 would have had all the same changes and would be "modern" similar to a 500 AF.  Along comes someone who trys to sell the idea of a 450 fourstroke and says main reason is it has alittel more power and torque than a 250 2 stroke but is heavier, more parts, not a "do it yourself" maintenacne, expensive, etc.  I dont think anyone would be interested.  Their argument maybe that a 500 has to much pwer and a 250 not enough.  I think the logic would be to pursue a 300 2 stroke.  more power and all the benefits of a 2 stroke (ease to maintain, cheaper, lighter, etc).   Sadly this was not the case

Ktm make a 300 2 stroke (offroad not motocross) and it competes very well with the offroad 4 strokes.  If they made a 300 sx it would be competitive with the 450 motocrossers.

The above senario would have been what i think would have been a logical progression but as it happened the 500's were doomed once the nationals ended and they stopped changing them so when the modern 450's came along to fill the need for more power/torque on the 250's and the consumer went with them and now we have heavier, more expensive, hard to maintain bikes.  as you can tell i am a 2 stroke fan.  4 strokes never made sense and i still scratch my head how we let this happen.
i have a kx500 for desert and dunes and a ktm300 for desert racing.  i will continue to supprt companies that make 2 strokes for as long as i can.

93KX5Rider:
I must agree that the change in the direction of dirtbike/motocross engines was purely out of greed and not because either machine performs better. Look at the world we live in today.

J.ellwanger:
soo... just curious why don't we all (every active member on this site) pitch in and open our own American MX/Enduro/motard Company??   and just BLOW everyone out the water?!?(mud hole?)  :? :?

 Seems like we have a few smart people around, Design. Few dumb but very good riders willing to try anything put their legs, no matter the size of engine, frame, (and by dumb, i mean Crazy guys willing to go outside the norm, where they can and will get hurt, Purposely,) yep i consider my self dumb, cause i know better, but dont care. take the K5 base, kx250 bored as big as we can and improve it, get a guy to practice on it 24/7 and throw him in a race... boom we have spotlight,
  american built Direct injection 2smoker, or maybe make the 300 being mentioned, and Squamp out the 450 4s.?
just a random ??  id be willing to donate all my spare time! as i have nothing better to do with this life I live

jBernard:
a 300-400cc 2 stroke and for a dream, add in EFI or Direct Injection and IMHO that would be a 4 stroke killer.
the longer the big manufacturers wait the less likely they are going to re-tool and dump money in R&D for 2 stroke.
Unfortunetly it will never happen due to the money made off 4 Strokes, bikes are more expensive, parts are more expensive. why would they go back?

i'm surprised you dont see a 300SX ktm. of course theres the 300XC but have to dump $$$ to convert it to an SX and loose some of the weight. theres also the big bore kit for the 250 but its $$$ as well.
i just bought a '14 ktm 250sx and its awesome. an ultralight 300 would be even better and close the gap the 450 4 stroke has. i dont think they want to make it because it would hurt 4 stroke sales obviously.

and the idea of a private company coming up with a dream engine. i dont think it will ever happen, theres no way someone can jump in and match any kind of R&D ktm or the japanese have come up with. would probably be a 300 2 stroke that put 40hp to the wheels and was full of problems.

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