Cylinder Works’ customer service representatives are on standby to assist customers however possible, whether it’s answering a quick question or offering in-depth installation advice. It’s not unusual for the same question to crop up often during our calls, and typically, we’ve got an easy fix. To help keep your bike in top shape, and hopefully save you a little time, we’ve compiled this go-to list of tips and advice for your most common dilemmas:
Ring End Gap
When you’re installing a Vertex Piston, always check the ring end gap:
· Single Ring — .004” per inch of bore
· Multiple Rings — .003” per inch of bore (top ring) and .004” per inch of bore (bottom ring).
When installing a Vertex Piston, be sure the marked or lettered side is up. With multiple rings, gold or silver is the top ring and the black ring is the bottom.
Piston to Cylinder Clearance
The recommended piston to cylinder clearance is .05mm - .07mm / .002” - .003”.
How Often To Replace a Piston
We are frequently asked how often you should replace your piston. A good rule of thumb is to replace it every 25 hours (or less) under race or heavy use conditions.
Cylinder Break-In Procedure
How to best break-in a cylinder is another question posed to us by many riders. We suggest that when you’re breaking in a new cylinder, keep the first two to three hours at a low RPM and small amount of throttle opening, while keeping the engine temperature low.
Hopefully, these quick tips have been helpful. If you need more information, our customer service representatives are always ready to assist you. Use this form to email us your question or give us a call at 515-251-4070.