yzfvsyz

Member
Mar 27, 2005
1
0
What are the maintenance requirements for these bikes? What would the maintanence be for the yz125 what would it be like for the yz250f? (I would be riding pretty hard 1-4 times a week.) How often would i have to replace the top and bottom end on the 125? on the 250f?
 

gonzo843

Member
May 24, 2004
199
0
Well there is sort of a trade off. There is a little more maintenance on the 125 but it's alot easier to maintenance than the 250F. On the 125 you have to change the rings every 15 hours. On a 250F you dont have to as often. But you can do it in less than 30 minutes. On a 250F it would take a couple hours to do right. Also 2-strokes have a little bit finikier jetting but again it's real easy to change quickly versus having to do it on a 4-stroke. You'll have to change oil every 4-5 rides on either bike but on the 250F the filter has to be changed too. I guess in the end it sort of works out.
 

NacNac250F

Member
Apr 15, 2003
154
0
Seems like it's been easier to maintain a two-stroke since I've gone back to one from a four-stroke. The 05' YZ125 is a very low maintenance two-stroke. The 250F has more moving parts so if one part goes bad it may effect other parts. From my experience, you can't jump on a four-stroke, beat the balls off of it and expect to not do any maintenance on it. If someone tells you a new motocrosser four-stroke is a more low-maintenance machine than a two-stroke then they are lying to you because there are just as many maintenance intercals on the new four-strokes as there are for the two-strokes. It may be true for an XR or sumthin because they don't make enough power to blow themselves up.
 

2-Strokes 4-ever

~SPONSOR~
Feb 9, 2005
1,842
4
Missouri
I was a long-time 125 rider, tried the 4-stoke thing briefly, but they just aren't any fun for me. I'll give you what I've learned, after a long history on the 2-stroke. Keep in mind, I'm a woods rider now, and don't keep the bike as "pinned all the time" like an MXer would.
I never really followed the owners manual to a T...(rings every few races). I did rings religously every 30hrs. and then a top-end at 60hrs. Wear was always good and predictable at these intervals, and not too costly. (never have suffered a top-end failure due to excessive wear) Rings and base gasket...20-30 bucks. Complete top-end...80-100. And I always split cases to take a look at lower-end every-other year..(every 2 years). I've heard the YZ125 is a long-lasting bike and if it was me in your shoes, I'd go 125. Use a good synthetic 2-stroke oil at a safe ratio, keep air filter clean, change tranny oil about every 5hrs., and ALWAYS let bike warm-up...(cold seizures are easy to do on a 125). Find a good jetting combo acording to temperature, write them down, and get used to re-jetting to fit the weather. Smoke 'em on the downhills!
 

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