Go to 4 stroke 250

TerryK
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CA
1/21/2012 1:35pm
Buy a 250 two stroke and be happy. Never EVER buy a used 250 4 stroke.
newmann
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24437
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4/1/2008
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USA
1/21/2012 7:16pm
Tech420 wrote:
Buy a used leftover cheap what? 250t?
Meant to say "new" leftover 250F. Sorry, correction made.
Team Ideal
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1173
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Ste. Marie, IL, USA
1/21/2012 9:19pm
check your local Yamaha dealer for a 2010 or 11 250F, they have $1000 cash back right now and IMO are the most reliable 250F out there. if you do look at a used 250F be careful, they can be ticking time bombs, but if you know who had it and how good they do maintenance I wouldn't be afraid to by one.

you can ride a 250 smoker in both 250 and 450 classes in amatuer mx if your thinking of going 2 stroke. just kind of depends on power delivery that your looking for. good luck, have fun.
Tech420
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1/22/2012 3:29pm
Well I have done some research and am really debating getting a 250 2 stroke. Seems like I can rebuild it in my kitchen without my GF throwing a shit fit.

The Shop

kxking
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Oakville, Ontario, CA
Fantasy
1/23/2012 6:44am
Tech420 wrote:
Well I have done some research and am really debating getting a 250 2 stroke. Seems like I can rebuild it in my kitchen without my...
Well I have done some research and am really debating getting a 250 2 stroke. Seems like I can rebuild it in my kitchen without my GF throwing a shit fit.
Excellent choice, you will not regret it. Kinda the best of both worlds....
Tech420
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USA
1/24/2012 10:36am
Could someone also give me a ballpark range for rebuild costs? What is regular maintenance for a 4 stroke? I am fairly good mechanically and could probably rebuild a 4 stroke top end myself.
OUMX117
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Edmond, OK, USA
1/24/2012 11:05am
Ok here's the deal with the four strokes. The reason the 450's last longer than the 250f's (typically) is because you don't have to ride a 450 nearly as hard to get around a track quickly, whereas a 250f you are wringing the piss out of it all the time. Four stroke pistons and rings have a much longer service life than those of 2 strokes...... HOWEVER: if the four stroke suffers some form of catastrophic engine failure (e.g. drops a valve, etc) you could be looking at $2000 or so in parts alone. For example I have a 2009 yz450f that I bought brand new in 2008. That bike has 97 hours on it and all I've done is change the piston once, and not even because it needed it, but because I just wanted to see how everything was holding up on the inside of the motor. So basically the four stroke will be cheaper to operate UNTIL something lets go inside the motor... Then you're looking at the big $$$. Two strokes will need a new top end every 20-30 hours (YMMV) and those can be done for under $200 a piece. It's all about what you prefer to ride and how you want to spend your money. I am quite partial to the two-strokes becasue they are so much fun to ride, but my race bike is a 450. Alot of people on here will argue all day about which one is better or worse, but the truth of the matter is they'll all get you out on the track. Based on what I've read from your particular case I'd recommend at 250 2 stroke it'll be a good way for you to be introduced to the sport and you'll develop better fundementals on a 2 stroke than a 4 stroke. Good luck with your bike search!!!
Tech420
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USA
1/24/2012 12:19pm
OUMX117 wrote:
Ok here's the deal with the four strokes. The reason the 450's last longer than the 250f's (typically) is because you don't have to ride a...
Ok here's the deal with the four strokes. The reason the 450's last longer than the 250f's (typically) is because you don't have to ride a 450 nearly as hard to get around a track quickly, whereas a 250f you are wringing the piss out of it all the time. Four stroke pistons and rings have a much longer service life than those of 2 strokes...... HOWEVER: if the four stroke suffers some form of catastrophic engine failure (e.g. drops a valve, etc) you could be looking at $2000 or so in parts alone. For example I have a 2009 yz450f that I bought brand new in 2008. That bike has 97 hours on it and all I've done is change the piston once, and not even because it needed it, but because I just wanted to see how everything was holding up on the inside of the motor. So basically the four stroke will be cheaper to operate UNTIL something lets go inside the motor... Then you're looking at the big $$$. Two strokes will need a new top end every 20-30 hours (YMMV) and those can be done for under $200 a piece. It's all about what you prefer to ride and how you want to spend your money. I am quite partial to the two-strokes becasue they are so much fun to ride, but my race bike is a 450. Alot of people on here will argue all day about which one is better or worse, but the truth of the matter is they'll all get you out on the track. Based on what I've read from your particular case I'd recommend at 250 2 stroke it'll be a good way for you to be introduced to the sport and you'll develop better fundementals on a 2 stroke than a 4 stroke. Good luck with your bike search!!!
Thank you for the help it was greatly appreciated. Now you make it seem like the motor is GUARANTEED to go. Do all motors let go? How often does a 4 stroke top end need to be replaced and how much does it cost?
Falcon
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Menifee, CA, USA
1/24/2012 1:28pm
Tech, I'll give you an analogy from roadracing that I didn't see anybody post:
a 250F is a lot like a 600cc sportbike. A 450F is like a liter bike. Obviously, the direct comparison is probably off by a smidgen, but you get the point.

As far as reliability and maintenance schedules, I'll let the more experienced posters give you that. I will concur that the smaller bike requires more maintenance because of the RPMs and related wear.
Tech420
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1/17/2012
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USA
1/25/2012 9:07am
Are there things you can do to prolong engine life on a new bike? Would putting in aftermarket steel valves right away help?
OUMX117
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1/20/2010
Location
Edmond, OK, USA
1/26/2012 12:08pm
Tech420 wrote:
Are there things you can do to prolong engine life on a new bike? Would putting in aftermarket steel valves right away help?
No, aftermarket valves are not the answer. Use OEM parts. If you want the most reliable 4-stroke, stick to a Yamaha. Honda is a close second on any bikes newer than 06-ish. In order to keep these modern 4-strokes happy I keep a fresh air filter in the bike EVERY ride and change the oil every other time I ride the bike (on a mx track, I change the oil after every XC race, but I don't do many of those in a year). If I were jsut getting stared in the sport I would not buy a new bike though. If I were you I'd seriously consider the 250 2 stroke. Used 250fs are a crap shoot as far as reliability is concerned. If you are going ot buy used look for a low hour 250 2 stroke or 450f.
mxb2
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Bowie, MD, USA
1/26/2012 12:28pm
Look for a leftover 11, great prices, buyers market!
Tech420
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26
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1/17/2012
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USA
2/19/2012 10:35am
Found a MINT 06 YZ250. I was putting around in the yard for a few minutes.......this thing is fucking FAST



pCp 252
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694
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Location
Hampden, MA, USA
2/20/2012 11:22am
The yz250t is widely regarded as one of the best, if not the best japanese two stroke. Great controlled power. With a weighted flywheel you can tone down the hit and make the bike very easy to ride. RM, KX, and CR are still great bikes though. Some will take more tuning than others but they are all simple and relatively similar.

Like someone else said earlier, I think it is smart to learn the fundamentals of MX on a used two stroke. You will be forced to learn throttle control, braking, and momentum through proper body technique and conditioning. Bad habits can easily be formed on a 4-stroke.
newmann
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24437
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4/1/2008
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USA
2/20/2012 3:23pm
Excellent choice for a great all around bike. Two thumbs up.
2/21/2012 4:28am
I bought one of those new in 06, and your right that thing was a beast. I wish I wouldn't have sold it, they are getting harder to come by now.
Tech420
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26
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1/17/2012
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USA
2/21/2012 10:25am
tmauto769 wrote:
I bought one of those new in 06, and your right that thing was a beast. I wish I wouldn't have sold it, they are getting...
I bought one of those new in 06, and your right that thing was a beast. I wish I wouldn't have sold it, they are getting harder to come by now.
ooo no doubt this was a great find for the price I paid. After a lot of research and question asking I was mainly looking at a yz 125 or a KTM 140sx. I just happened to come across this mint 20 hr 06. The owner wanted the bike for woods but it was too much for him. I tore the motor down and it certainly looks like it. I ended up scoring it for $2,500.
Barrett57
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GB
2/21/2012 12:56pm
Good choice. Have fun!
Surfinglbi23
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113
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1/1/2012
Location
Philadelphia, PA, USA
2/24/2012 8:39am
Awesome choice, 2 stroke is the way to go! So easy to work on and they make such awesome noise that you feel like you are hauling no matter how fast you are actually going!

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