Temporarily Out Of Stock.
750cc Big Bore Cylinder Block Kit
for Triumph T120 650cc Twin Motorcycles

750cc Big Bore Cylinder Block Kit


  • Sandcast Alloy 356 Aluminum Block
  • Centrifugally Cast Iron Sleeves by Advanced  Sleeve
  • Better Heat Transfer From Piston To Block = Detonation Resistant Engine
  • Tighter Clearances = Better Sealing = More Power
  • 7 lbs. Lighter Than Stock Iron Block
  • Bolt-on: No Modification to Cases Necessary
  • Kit Includes Cylinder Block With:
    • Bronze alloy Tappet Guide Blocks from Kibblewhite Precision installed
    • Cast Pistons, Rings, Wrist Pins, and Clips
    • Exhaust Tappet Oil Feed Retained
  • For An Additional Charge, We Offer Total Seal™ "Gapless" 2nd Ring Technology Which Provides Superior Sealing, Raising Effective Compression & Providing More Manifold Vacuum.
    (Note: Raising manifold vacuum may result in mixture changes. Be prepared to re-jet carburetors. It is strongly recommended that a quality valve job be performed and Total Seal™ recommends the installation of positive style valve guide seals to prevent oil from possibly being drawn through the guides due to increased intake stroke efficiency.)

  • Block warranted against mechanical defect for 1 year

Triumph T120 motorcycle aluminum alloy and cast iron sleeve cylinder block

Block Kit with Guide Blocks, Pistons, Standard Rings, Pins, & Circlips: $1450.00
Kit with Total Seal™ Gapless Rings: $1490.00

Shipping costs:

  • United States:
    • 2-3Days - $40.00 ea.
  • Canada:
    • 5-10 Days - $50.00 ea.
  • Europe & Pacific Rim:
    • 5-10 Days - $112.00 ea.
To Order Online Through PayPal (payment in US dollars only) click on the appropriate button below. The item will come up with the appropriate shipping charges already included.

United States Canada Europe &
Pacific Rim
Block Kit
Block Kit with Total Seal™ Gapless Rings

To order by check or money order through the mail, or for any other questions, contact us