Jump to content

Please help id this yz 25p

Recommended Posts

Was under the impression my bike was a 2000 yz 250, ive searched the entire bike and can only find a few numbers below the counter shaft and on the cylinder, any yz experts out there please help me identify this bike!! 4XL 00 Y-1  is the number below the countershaft and 4XL 10 is on on cylinder.. thanks guys!

20170905_185911.jpg

20170905_185837.jpg

20170905_185806.jpg

20170905_185755.jpg

20170802_204516.jpg

Share this post


Link to post
Share on other sites

No VIN? Should be on the steering stem on the right side, in between the triple clamps?

Share this post


Link to post
Share on other sites

- Cylinder (power valve cover) and right-side case cover appear to be '95 - '98.

- Carb is from '96 - '98

- Swingarm looks like 1999 - 2001.

- Airbox (white) and square-tube (aluminum) subframe is 2000 - 2001.

Starting to look like a pre-1999 motor in a post-1999 frame. :excuseme:

Going through parts lists can help identify various pieces.

Share this post


Link to post
Share on other sites

Jesus christ i had a feeling it was a different frame to engine.. just dont want to go buying the wrong parts for it.. already bought the wrong countershaft sprocket :/ theres no vin anywhere i can find im guessing the frames been resprayed at some point.. thanks guys.

Share this post


Link to post
Share on other sites

One other thing, given the amount of butchering errmmm work done to this bike... whats the best way to measure the bore to find the right size piston? Thanks again everyone really appreciate the help.

Share this post


Link to post
Share on other sites
12 hours ago, Scottwr12345 said:

One other thing, given the amount of butchering errmmm work done to this bike... whats the best way to measure the bore to find the right size piston? Thanks again everyone really appreciate the help.

Caliper at various points of the bore. Also make sure it is not out of round.

  • Like 1

Share this post


Link to post
Share on other sites
14 hours ago, Scottwr12345 said:

...theres no vin anywhere i can find im guessing the frames been resprayed at some point...

The frame's VIN is on the steerer tube, on the throttle side. If the number has not been thoroughly removed, it should still be discernible - even under powdercoat. Use a bright light - or sunlight - and look carefully. The number is stamped, so there will be deformations in the steel.

The non-floating front brake disc (and other clues mentioned earlier) indicates the frame, bodywork & running gear (if original) are 2000.

http://www.partzilla.com/parts/search/Yamaha/Motorcycle/2000/COMPETITION+-+YZ250M1/FRONT+BRAKE+CALIPER/parts.html

The good news is the same piston fits both '97 & '98 cylinders, so that should help.

http://www.partzilla.com/parts/detail/yamaha/YP-4SR-11631-00-B0.html

Good luck, and keep us updated with what you find. :thumbsup:

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:


×