Banshee Athena 421 Big Bore Stroker Kit Ported 4mm Cylinders Top End Rebuild

• Athena Stage 3 ported 421cc big bore cylinders
• Wiseco forged 68mm big bore pistons
• Cool head big bore domes cut for 4mm stroker crank
• Nitrite coated piston rings
• Chrome wristpins
• Circlips
• Cometic top end gasket kit
• Cool head oring kit
• Wristpin bearings
• NGK spark plugs
• Maxlok TITANIUM head stud kit
• 392cc big bore works with stock crankshaft
• Bolt on kit no machining required
• Big bore domes are required
• 6 month warranty*

 *Warranty: This product is NOT DIY and it is the responsibility of the person installing and tuning the parts to ensure they work correctly.  Over 99% of people in the world are not qualified to work on an engine, and we ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic. STUD WARRANTY: If for any reason a stud fails during use, not installation, we will send a new, complete stud kit.  No other parts or any labor are included, and it cannot be converted to a refund or discount on any order.   ALPHA CUB WARRANTY: If your Alpha Cub cylinder fails it will be repaired or replaced free of charge.  Warranty for all products we sell does not cover failure that is a result of improper installation, tuning, break in, or misuse.  For any warranty to be considered the part(s) in question must first be sent back to us for inspection.  We do not warranty parts based on phone calls, photos, emails, what you read online, or another mechanic's assessment alone.