I don't know much about 4 strokes, but why are they better for comfort and distance?The build I'm contemplating currently is focused on comfort and extreme distance runs, speed is far less a consideration - thus I'm after a 4 stroke.
I don't know much about 4 strokes, but why are they better for comfort and distance?The build I'm contemplating currently is focused on comfort and extreme distance runs, speed is far less a consideration - thus I'm after a 4 stroke.
I'm just really wondering here how you can actually think that 2-stokes rule??? Other than a 2-stroke winning the Deathrace this year, I can think of none. The AMA Supercross and the AMA motocross series....tell me how they ruled there? Honda, Suzuki, Yamaha, Kawasaki, KTM and Husqvarna, what type of engines are they building and RACING and winning with now? 4-strokes dominated, no dispute!There have been many threads on this subject...
I totally disagree with the above statement! (except for the fact that they cost more!)
2-stokes don't foul the plugs (if you mix your gas right), they last just as long (if you take proper care of them), they are just as quiet (they both have the exact same mufflers!!), there's zero smoke if you use synthetic oil mixed @ 100:1, they cost less, look better & fit in to more frames, they have far less parts to break, they are much faster!! (there's never been a 4-smoker that could keep up with us on our rides!!), more high performance parts for them & they get 90MPG even after totally hot rodding them!!!
4-strokes are heavier, co$t three times more, they are slower & have way less hill climbing power, they have ten times more parts that can break, require super wide pedal cranks to clear the engine, they have centrifugal clutches (that blow), they're ugly, (they look like you put a lawn mower engine on your bike), they only have pull starts (which break), & no one makes high performance parts for them!
2-strokes rule!!!
Really? Is that true? ROFL, if it is - that confirms my political suspicions w/o a doubt...In the AMA motocross races, why were the 250 4-strokes pitted against the 125 2-strokes. Why not pit them against 250 2-strokes?
Yamaha YZ460F against Honda CR250R?
Something seems slanted here....
Why you ask? The simple answer is a 2-stroke puts out nearly twice the power per displacement of a 4-stroke of equal size. And that is why the AMA allows this ruling. I wasn't talking about raw brake horsepower....my 66cc 2-stroke can spank my piddly little 49cc 4-stroke. Which bike do I prefer to ride everyday...take a guess? Sorry, it's the 4-banger, mini-thumper!In the AMA motocross races, why were the 250 4-strokes pitted against the 125 2-strokes. Why not pit them against 250 2-strokes?
Yamaha YZ460F against Honda CR250R?
Something seems slanted here....
Because you don't have to pedal them to get them started......but that's just me.I don't know much about 4 strokes, but why are they better for comfort and distance?
This is all so true.....might make a sticky out of this....very well put!I suspect that the current dominance of the four strokes in the AMA racing circuit would be political - after all, the primary reasons for racing is product development and marketing.
What point would there be for the major manufacturers in continuing development on a engine that's become the scapegoat? Pound for pound the two stroke has always had better characteristics for motocross in particular - but if you have the resources of a major manufacturer these differences aren't so much the primary concern as pushing product.
Four strokes will no doubt eventually be the only type available - yet this has nothing to do with it's performance and everything to do with politics. Don't think for a second that politics doesn't effect the racing circuit or engine development lol
BUT - that's all beside the point anyway, we're talking about available engines suitable for mounting on our bicycles. Of those engines available - if we're talking sheer performance per displacement & weight I'm afraid the 2smokers still haven't got any real competition. The only reason any of the available four strokes even come close is because the China two strokes are about as primitive as you can get - throw a Morini into the equation and the debate is over.
That still doesn't mean I think the four stroke inferior in any way - again, for what's available for our bikes, the four stroke is quieter, smoother running and does have better long term reliability & fuel efficiency potential.
It's still about what tool is more appropriate for what you want out of yer ride.
my 2 stroke keeps up with a 4 stroke no problem but i would rather have the 4 for the road and my 2 for the dirtI have built both so heres my thought...
Skyhawk 66c gt5 vs HS 49cc
The 4-strokes are better, hands down...
The 2-stroke are cheap, unreliable, and a crapshoot at best. Parts are widely available, but for good reason, because things break often. Carbs are almost always out of adjustment, which can lead to premature wear.
The HS is a good little motor. A Japanese design Chinese copy, is better than a Chinese design in my book. Some guy have over 50k on their Huasheng. Show me a 2-stroke with 50k then we can talk. They have a good power band, loads of grunt for a 49cc, plus 7000 rpms equals good top end. The only disadvantage is the gearboxes. Their 6+ to choose from, some better than others. But the EZM shows a proven 45mph+ and silent operation. Show me a 2-stroke single speed that can do that.
Step your game up, get a thumper
??? Grenade? I think there may be conditions, under which that could happen, which may very well be related to either a less-than-reputable maker's quality or an owner's diligence with upkeep. I know the four-strokes on the lawn mowers and garden tractors I've owned and used and maintained (rather well I may add) were by no means trouble free. If anything, they were right on par with my two-stroke. I know this may be apples-and-oranges but my experience has been that my two-stroke is easier to start. My old arm gets tired after pulling rope a few times. And I think I've rebuilt the carburettor on more four-strokes than I have on two-strokes (well, I haven't had to yet on a two-stroke).I havent seen any posts about 4 strokes turning into a grenade within the first 200 miles. Havent seen any posts about trying to get the 4 strokes running after building the kit bike. The two strokes are initially cheaper but after replacing the engine three or for times?