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If you're that kind of guy and you like building project bikes, go for it!
I'm somewhere on that two-stroke spectrum, I race a YZ125 most of the time and sometimes a YZ300.
My experience on the 500cc machines has been that they vibrate like hell and the power delivery limits your line choices. I really enjoy them and have thought about building one just for fun, but the 300 Yamaha is so good I haven't bothered.
Would have been awesome if you ask me
I would have tried for $250, last time I saw it the tires where just about falling apart but there was limited rust and a few broken plastics, but looked like a worthwile investment
I have been looking into a yz250t with a big bore kit, how does it rate?
The Shop
And to anyone saying they are deadly to start, I'm probably around 155 lbs and can start mine with regular shoes on, though it can be a risk to your shin.
The 500 sounds like I bike you'd own just to say "I own a 500cc two stroke"
I've been racing the bike with the big bore kit since 2012 with about 50 hours on it. Most of that time is racing laps, not practice days.
With 14:48 gearing (Stock was 14:49) this thing will pull a 3rd gear start and run with anyone on a 450F. I weigh in at 160 lbs. I've had top 3 starts in combined A/B gates at Washougal and at Horn Rapids. Horn is a concrete pad to a long sandy start straight. Up the hill at Washougal, I have never felt that the bike needed more power and it doesn't give anything up to a 450F when it's on song.
These YZ's handle great as far as I'm concerned and the suspension is good, especially with stiffer fork springs. I went up from .44 stock to a .47 and it helps a ton.
I have won many races on this thing but it's not a better race bike than a 450F. The 450 is dramatically easier to ride. You really have to be on top of your game and in shape to keep this big YZ under control at race pace. I think a flywheel weight helps and most guys use them. I've never tried one on my bike.
With the power this big bore YZ makes and the handling, the 500cc two stroke is just a novelty.
On any two stroke though, you will make more mistakes per moto than a four stroke, they are harder to ride.
I'm typically a 125 rider these days, but I'm considering a 450F as my next race bike to replace the YZ300. It would be my first four stroke motorcycle.
http://youtu.be/0xB6Yo7tdl8
(The vid is uploading... It may take an hour or so before it shows up).
will you go faster than on a modern four stroke, no, but you will be way cooler,
but you learn things about 500 two strokes, like never start them with out a boot on, vibration is a something to deal with,
but nothing, and i mean nothing, feels and sounds like a 500 hooked up and power sliding though sand or fresh loam,
Pit Row
"Bullshit."
http://motocross.transworld.net/videos/sean-collier-and-the-beast/#xwC8…
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