How-To: YZ250F WR250 Top & Bottom End Rebuild
Josh took me up on my engine rebuilding + video service for this 2007 YZ250F engine featured in this video. This motor blew the large end connecting rod bearing and sent metal everywhere! Does your YZ250F or WR250 need rebuilding? You can totally fix it yourself instead of paying a shop when you follow along with this step by step video. The video series is actually 3 parts and totals 5 hours in length:
- Bottom end – 2 hours 30 minutes long, video starts with engine removed from frame.
- Top end – about 2 hours long, completed while engine is in frame.
- Valve adjustment – 1 hour long and is a maintenance item that every owner should learn how to do properly.
Year, Make, Model
The following models are covered in this video:
- YZ250F – 2002 thru 2013 exact, will help on 2014+
- WR250 – 2001 thru 2007 exact, will help on 2008+
Tools
Below are links to tools used in the video. Some of the link are affiliate links and support me at NO COST to you.
Motion Pro Gear Jammer 08-0427
Motion Pro 08-0026 Flywheel Puller M27X1.0 L.H
Motion Pro Clutch Holder Tool 08-0008
Vessel Megadora 980 Impacta P2x100 #2 JIS Impact Screwdriver
Do you only get to watch this video one ?
No, unlimited views and is yours forever.
Does it work with wiseco rebuild kit? Or oem only. 03 yz250f.
Yes, doesn’t matter what parts you use.
Hey Matt ,Dave from Australia,mate this video works for a 03 wr250f
Yes!
hey Dave, just bought a WR250f myself, wondering if you have rebuilt the bottom end on your stead specifically the 5th gear problems how long and what parts you needed to buy to do this build, would really appreciate any help.
thanks, Liam.
I bought this video but there’s no login to watch on a different device. It’s trying to make me pay again.
Owen, I will email you.
I bought this and cant find login
Email sent.
Hi Matthew, are you able to send me these videos through email. I purchased but the streaming is constant buffering. I would like to download these and watch offline as well. Thank you.
Barret,
The videos are streaming only. Have viewing conditions improved at all? What kind of internet speeds do you have?
Hey mate
If i pay for this video does it make all your other videos available? If not how much to open them all?
Videos are sold each.
Mathew, I have lost my log in email. Can you resend it, please.
Please email me here and provide the email address used to purchase:
https://howtomotorcyclerepair.com/contact/
Hi, I see you say that this rebuild is for 2002-2013 yz250f however i’m trying to rebuild my 2001 yz250f. I was wondering how useful this video is for the 2001? Thanks.
Yes, video applies to your model year.
Hi does this cover transmission assembly; forks, drum position and slots forks go into…etc
Yes, it covers it all.
Can you send me a link for the oil sight glass/seal
Here is how to look it up: https://youtu.be/eqe59cINk7A
Can I purchase just the top end rebuild video?
Sure, here it is: https://gumroad.com/l/YzRx
I’m looking to rebuild a 2006 yz450f. would it be the same as the 250? if so i would consider purchasing your video.
thanks!
The video will be close. Same procedure and tools for the most part. If you decide to buy and does not help you, just ask for a refund.
Hey mat it said to make a fair price but I wouldn’t know what this would be worth can you give me a price please
You have to enter at least $30. Thanks!
Can i purchase a hard copy dvd of this?
Sorry I don’t sell DVD’s. Purchase and stream instantly instead.
Interested in sending you my 2007 yz250f lower end to have new crank installed. How do I contact you?
I’m not accepting any service work at this time, sorry.
Hey Mat!, Mike from Ontario Canada!
I Bought a 2018 KTM 450SXF and having trouble with it, it starts and idles rough and when i give it throttle it misses, sometimes backfires and cuts out!
I’m new to the world of fuel injection and am unsure about it! Can you help me out? Videos or whatever?
Michael,
I’m not that familiar with FI. Sorry.
WR250F rebuild intervals: Can anyone please tell me roughly how many KLMs or miles before a top end refresh or rebuild is needed or warranted on a 2008 WR250F. I am looking to buy one but No one is showing hours, just kilometers and most bikes are around the 5000k mark without having a rebuild yet. I know it depends on how the bike was ridden during that period as in a trail rider will last longer than a rev limiter bouncer. Lastly is the 2008 a better bike than the previous or should I save a little more if a big upgrade was a few years later (like 2010) Thanks for any help offered
Emery,
That is a very hard question to answer. A lot of factors play into the health of the engine like you mentioned.
If the owner has good maintenance records and the bike seems to be in good shape, then go for it.
I was wondering if you have an 2014 yz250f exact top and bottom engine rebuild video. I just wanted to know before I buy this video because I don’t know if this video will be close enough to my 2014 yz250f engine to where id be able to see the exact places and parts you put in. Or should this video be close enough to where I should know where to put all the parts
This video is the closest thing I have for your 2014. It will help for sure.