This is an ENGINE TOP END REBUILD KIT and MACHINING SERVICE for all year models of your 1989-1991Yamaha YFM250 Moto-4 four-wheeler.

 

 

PLEASE NOTE: you will be required to mail in your old cylinder to us---this is a remanufacturing service of your cylinder!

 

 

Here's what's included with this kit and machining service:

• Once you place your order, we will email the address and shipping instructions to you.
• You mail in your cylinder to us, and we'll bore and hone your cylinder to the next oversize.
• We'll mail it back to you along with a matched oversized piston and ring kit which includes piston pin and circlips.
• We'll include a top end gasket kit.
• We'll include instructions for proper break-in procedures for your new top end rebuild.
• This kit will come ready to bolt on for a quick and easy top end rebuild.

***WE ALSO OFFER A CLEANING AND BEAD BLASTING SERVICE FOR YOUR CYLINDER FOR AN ADDITIONAL $20.00 FEE. PLEASE CONTACT US IF YOU'D LIKE TO ADD THIS ADDITIONAL SERVICE TO YOUR ORDER.***

Let's face it. All machine work is not equal. When it comes to machining, you get what you pay for. We invest the time in every cylinder that we sell to provide only the highest quality workmanship to very strict tolerances making our machine work second to none. We have shops and race teams all around the world that rely on us every day to provide them with the quality machining they've come to expect over the years. The machining you receive will be to the same quality standards. The cylinder is precisely matched with an oversized piston kit that includes the correct oversized piston, piston rings, piston pin and circlips. Simply mail us your old cylinder, and we'll get it machined asap and get you up and running again. We also offer repair manuals as well. These will walk you through every step of the disassembly and rebuild and also include tolerances, torque specs etc, so be sure to check it out.