Compression psi on 2003 YZ250? - 2003 Yamaha YZ 250

Question edited for clarity, maker and order, year make model.
Question moved from Garden Equipment.

It says in the link, it should be 180. Rebuild time.

https://www.google.com/search?q=2001+Yamaha+YZ250.+Engine+compression

..

between 150-175 psi is normal range but should check in your owners manual it should list that information there or contact your local Yamaha dealership.

Any thing over 200 psi is good - remember to hold throttle full open when kicking over to get an accuratre asesment and can take 10 - 20 kicks to get maximum reading on the guage

10 clicks out from full hard on both compression and rebound ( give or take 1 or 2 )

This Yamaha YZ250 parts site has it all.....Cheers.

http://www.boats.net/parts/search/Yamaha/Motorcycle/2003/YZ250R%20-%20YZ250/INTAKE/parts.html

Air filter clean, hold throttle wide open while kicking...at least 100 psi. 130-150 is good.

hi inter_state,

here is the complete parts catalogue of the yammy yz250:

http://www.yamaha-motor.com.mx/Manual_Partes/Catalogos/Cross/YZ250/5UP2_2003.pdf

you should be able to see where the seal is fitted around page B6 and further

regards,

voodoo

clean out the entire airbox along with really clean out the air filter, use gas to clean the filter then rinse it out with warm water.iv been doing it for years, dont let anyone tell u otherwise, check the reeds, replace if needed, clean the powervalve. clean the carb. i dont no wat else could be a matter with the bike, unless its in the cylinder like no compression of broken or worn piston rings, who noes. get curious check **** out that away u dont have to waste ur time askin us. u no