MCB Performance - MX / Dirt Cylinders

IMPORTANT: MCB maintains one of the largest selection of hard to find MX/Dirt/Vintage cylinders in the country. Unfortunately some are VERY hard to come by and with the huge surge in demand for the older MX bikes we are often out or have only one ready to sell. Because of customers NOT returning the cores we have implemented a policy that REQUIRES the customers core to be shipped to us and inspected BEFORE we will fill the order.

We prefer that you identify your CASTING number and email us to check stock on these cylinders before placing the order. We will then check inventory and see if we have a finished cylinder ready or if we have one in production. You may then place the order online which will "lock" that cylinder under your name and then ship us your core.

MAKE SURE YOUR CYLINDER IS NOT AN AFTERMARKET CYLINDER, PORTED, IRON SLEEVED OR OVERBORED. (IF YOUR CYLINDER FALLS INTO ANY OF THESE CATEGORIES EMAIL OR CALL US FOR OTHER OPTIONS). 

ALL MCB CYLINDERS SENT TO OUR CUSTOMERS ARE 100% BARE WITH NO STUDS, POWER VALVES OR ANY OTHER FITTINGS - ANY REMAINING PARTS RECEIVED IN YOUR CYLINDER CORE WILL NOT BE RETURNED AND YOU WILL BE CHARGED A FEE FOR THE REMOVAL. ANY ADDTIONAL DAMAGE DONE TO ANY GASKET SURFACES WILL ALSO BE CHARGED A FEE TO REPAIR.

  Thank You for your understanding - MCB Performance 

------WE ARE ALWAYS LOOKING FOR USED OEM MX CYLINDERS, (CYLINDERS CAN NOT BE SLEEVED OR AFTERMARKET).-------

PLEASE EMAIL US PHOTOS OF THE YOUR CYLINDERS. 

• How to check your cylinder to verify its a good core.
• Sleeved- Place a magnet on the inside of the cylinder and if it sticks it will be sleeved. Also look at the skirting to see if you can Physically see a Iron sleeve. A OEM plated cylinder, a magnet will slightly stick to the bore.
• Ported- Look to see if any grind marks on the intake or exhaust ports. Usually it will be a different color as material has been removed.
• Over Bored- Take a set of calipers and measure the bore of the cylinder. You will need to know what stock Bore size is for your cylinder.
• Aftermarket- Most aftermarket cylinders will have the company named stamped on it, Cylinder works is on the skirting. Most OEM cylinders will have a casting number stamped on it but Not all, Some Older models will have the casting number.
•    If you have any Questions about your cylinder Please Email us Photo's and a detailed description of the machine you are working on.
• mcb@mcbperformance.com