What’s the most reliable longest lasting mx bike available

8/4/2022 12:47am Edited Date/Time 8/5/2022 3:52pm
That’s not a 450?

Ktm350
Yz250 2 stk
????

Crank wise, gearbox wise etc.
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mx313
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AU
8/4/2022 2:00am
It all depends on your speed an riding style.
My guess would be a newish yz250f. Unless your like national a speed. Pros can break the gears pretty easily.
An Def not a 2 stroke even tho a lot of ppl go on about them. Your way more likely to have to separate a 2 stroke case then a 4 stroke. It's just if u need to it's cheaper on the 2 stroke.
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Motofinne
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FI
8/4/2022 2:09am
Austrian 350 would be the clear winner.
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8/4/2022 2:21am Edited Date/Time 8/4/2022 2:36am
Late 90s to early 2000s 2 strokes. Honorable mention to the old school KDX 200 to 220s. My family had a 1996 XR 200 that never got maintained as far as I know and still runs like a champ, it's actually my favorite bike of all time.
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The Shop

cwel11
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Orangeville, PA US
8/4/2022 2:24am
Late 90s to early 2000s 2 strokes. Honorable mention to the old school KDX 200 to 220s. My family had a 1996 XR 200 that never...
Late 90s to early 2000s 2 strokes. Honorable mention to the old school KDX 200 to 220s. My family had a 1996 XR 200 that never got maintained as far as I know and still runs like a champ, it's actually my favorite bike of all time.
OP did say “MX” bike
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davis224
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Cornland, IL US
8/4/2022 2:30am
Any 5 valve YZ250f
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8/4/2022 2:35am
Late 90s to early 2000s 2 strokes. Honorable mention to the old school KDX 200 to 220s. My family had a 1996 XR 200 that never...
Late 90s to early 2000s 2 strokes. Honorable mention to the old school KDX 200 to 220s. My family had a 1996 XR 200 that never got maintained as far as I know and still runs like a champ, it's actually my favorite bike of all time.
cwel11 wrote:
OP did say “MX” bike
Hence the first line of my post....
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wiedeman
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Osceola, WI US
8/4/2022 4:16am
New yz250fs are really good. Oem pistons are also only like $55.
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Jake_CR250R
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Ozark, MO US
8/4/2022 4:38am
I’d say it revolves around 2 factors with new bikes. How good your preventative maintenance is, and your riding type. I’ve seen a few 300+ hour stock top end KTM 300s that were woods racing bikes.
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lumpy790
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York, SC US
8/4/2022 4:56am
There is no magic MC they will all break at some point.
8/4/2022 4:59am
Ktm 250 sx
I vote 250sx carbureted. As long as your jetting is dialed, you use good fuel, and clean your air filter. I got 280 hours out of the oem crank, and at multiple points in those 280 hours, I’m sure my jetting was questionable lol
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geeZ177
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Western NY area, NY US
8/4/2022 5:53am
My vote is 250 2 stroke whether it be a YZ or a SX. Unless you are riding 80+ hours a year/season, you should be able to make the whole year on a top end and several years on the bottom end. After talking with guys at the track and reading reviews on here it seems like the 350 ktm would be a good choice for a long lasting 4 stroke that isn't a 450. After that I'd say YZF 250. But if you want a 4 stroke to last to me it seems Iike a 450 is where it's at, as they just don't get worked hard.
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Gungadin
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Sarasota, FL US
8/4/2022 5:58am
1974 MX250 or MX360 Yamaha.
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8/4/2022 6:07am
My only real break down in the last 20 years was a 2015 yz250f. 50 hrs . Rod broke. Right through the case. 3000$ canadian.Not uncommon for that year.
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snape99
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Location
AU
8/4/2022 6:15am
That’s not a 450?

Ktm350
Yz250 2 stk
????

Crank wise, gearbox wise etc.
Bruh. You love those Austrian 350s
Suprise this is even a question 😊😎
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walent215
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Ridgecrest, CA US
8/4/2022 6:16am
My only real break down in the last 20 years was a 2015 yz250f. 50 hrs . Rod broke. Right through the case. 3000$ canadian.Not uncommon...
My only real break down in the last 20 years was a 2015 yz250f. 50 hrs . Rod broke. Right through the case. 3000$ canadian.Not uncommon for that year.
Ouch
Sorry to hear that
Did you own it since new
If so what oil and service intervals did you run?
Mr. Afterbar
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Green Bay, WI US
8/4/2022 6:21am
wiedeman wrote:
New yz250fs are really good. Oem pistons are also only like $55.
They have cam chain issues from what I have heard from numerous sources.
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8/4/2022 7:01am
Austrian 350 easy. Monk here had on vital put over 700 hours of pretty hard use without even open the valve cover on the bike. I have also seen some yz125 with crazy hours of woods riding.
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8/4/2022 7:17am
Had great luck from both of these.

1974 Husky 450 Desert Master
Rokon 340
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Moto520
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Schaumburg, IL US
8/4/2022 7:26am Edited Date/Time 8/4/2022 7:28am
YZ 250 is easy to keep running forever. They do have minor issues with the gearbox. It could take 100-200 hours to get to the problem but it's there. Then....i would go to the YZ250F.
Yamaha's really are put together amazingly well.
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TeamGreen
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Thru-out, CA US
8/4/2022 7:30am
I’ve had a Husky 350 since late 2014 that has been as reliable as a diesel truck
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LungButter
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Yellow Pine, ID US
8/4/2022 7:36am
TeamGreen wrote:
I’ve had a Husky 350 since late 2014 that has been as reliable as a diesel truck
Are we talking a pre or post DEF truck?
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Books
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Hartshorne, OK US
8/4/2022 7:42am
Motofinne wrote:
Austrian 350 would be the clear winner.
Not all.. I’ve owned a few and mine last and current one, the 22 model only lasted 6hours, destroyed engine because off a failed peek sprocket in the oilpump Sick
prozach
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Eureka, CA US
8/4/2022 7:48am
It's kinda a crop shoot. Sometimes shit goes wrong in a big way right away, sometimes not for a long time. 🤷‍♀️ Maintenance and riding style can influence longevity, but the sometimes it still just breaks.

From my experience 125 are a ticking time bomb for mx. 450s are pretty bulletproof, 250 two strokes or 300s next. 250f for faster riders on MX are a lot of work generally also.
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prozach
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Eureka, CA US
8/4/2022 7:51am Edited Date/Time 8/4/2022 7:53am
It's kinda a crap shoot. Sometimes shit goes wrong in a big way right away, sometimes not for a long time. 🤷‍♀️ Maintenance and riding style can influence longevity, but l sometimes it still just breaks.

From my experience 125 are a ticking time bomb for mx. 450s are pretty bulletproof, 250 two strokes or 300s next. 250f for faster riders on MX are a lot of work generally also.
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