Skip to content
HAPPY NEW YEAR!! We are back and shipping orders as fast as we possibly can! Thank you for your patience and understanding. - BPRATV TEAM 🎇🧨
HAPPY NEW YEAR!! We are back and shipping orders as fast as we possibly can! Thank you for your patience and understanding. - BPRATV TEAM 🎇🧨

Banshee 421 Serval Cylinder Cub Big Bore Complete Top End Upgrade Kit Domes

by BPRATV
Original price $1,899.99 - Original price $1,899.99
Original price
$1,899.99
$1,899.99 - $1,899.99
Current price $1,899.99
FITS ALL YAMAHA BANSHEE MODELS AND YEARS!!

ADD UP TO 80hp OF CUB POWER!
  • NEW CPI 421cc 68mm x 58mm CPI Serval cylinder
  • Wiseco 573M06800 forged pistons
  • Wiseco hi temp piston rings
  • DLC coated pins
  • Circlips
  • .020" one piece Cub base gasket
  • CNC stud extenders
  • ARP 12 pt base nuts
  • Water jacket plugs
  • 24cc Cool Head big bore billet domes
  • Cool head oring kit
  • Wrist pin bearings
  WE ARE THE LARGEST DISTRIBUTOR OF CPI CHEETAH CUB CYLINDERS ONLINE!  CONTACT US FOR ALL OF YOUR CHEETAH CUB NEEDS!

This top end is designed to be run with a +4mm (115mm rod) crankshaft.  Everything is brand new.  Original manufacturer's warranty applies*.

Banshees are one of our specialties so contact us for all your Banshee needs!

Please check your order thoroughly when you receive it and contact us if you have any issues at all.  If you are not 100% happy with what you receive you are welcome to return it PRIOR TO INSTALLATION for a full refund, not questions asked!  Thanks!!

*We recommend that this kit be installed by a qualified mechanic with experience working on these types of motors.  Warranty does not cover any failure that is a result of improper installation, improper tuning, improper break in, or misuse.  For any warranty to be considered the part(s) in question must first be sent to us for inspection.  We can not warranty anything based on phone calls or photos alone.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare