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Tuning and modiying your ( actually my) two stroke MX 'er for four stroke like power
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[QUOTE="sosomechanic, post: 839055, member: 21275"] Reality check time. A couple of the last few posts are plain ridiculous. Saddle time aint the primary factor in making an engine with minimal low end torque, a potent mid range burst and extremely quick throttle response effective and easier to ride on loose and slick terrain. The '03 RM 250 motor ( like most other years for the RM) is tuned from the factory to suck in conditions like my area. Very low flywheel mass and a strong midrange hit are simply nowhere near the most effective power traits for slick clay hardpack, loose gravel, pinestraw, mud or other low traction surfaces which dominate many off road areas including mine. I have a really hard time figuring out how the lack of low end torque on my RM 250 is to my advantage in the woods. If you want to go quick on bikes like this with a weak low end output then you have to bring it up into the midrange where you are constantly trying to keep the HIT from biting you. With sufficient low end , which it now has, I can lug it more and use the midrange burst less achieving better hookup and drive in tight and slick stuff. To advise someone riding a bike with power output that strongly mismatches their riding conditions to forego thoughtful mods ( like porting, flywheel weights and powervalve adjustment) for more saddle time as the best solution makes absolutely no sense. On the other post, exactly what does it prove if you're flying by the four strokes in slick mud on a stock RM 250? Is that clear proof that the RM 250 was better suited to the conditions? I can think of at least one other possible explanation. How about this one, the four stroke guys you were passing just possibly might be slow ass riders :rotfl: I can't believe someone actually believes that a stock, late model RM 250 is superior in slick mud to four strokes. That is completely detached from reality. :bang: [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Tuning and modiying your ( actually my) two stroke MX 'er for four stroke like power
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