Shop67 M8 Big-Bore Kits are built for riders who want real power, durability, and consistency—not just a pile of parts.
Each kit starts with brand-new cylinders machined to accept gen 1 or gen 2 cyl heads that are torque-plate honed in-house to replicate real-world operating stress. This process ensures proper ring seal, reduced blow-by, and long-term reliability. Every kit is matched with forged pistons, chosen for strength, heat resistance, and stability in high-performance applications.
Pistons are paired with file-fit rings that are pre-gapped to spec, eliminating guesswork during assembly and protecting the engine under heavy load and heat.
Before shipping, every kit is thoroughly cleaned, lightly oiled, and packaged ready to install, saving build time and ensuring contamination-free assembly right out of the box.
Multiple compression ratios are available to properly match camshaft choice, fuel quality, and riding style—whether the goal is a strong street build or a more aggressive performance setup.
Kit Features:
Torque-plate honed new cylinders
Forged pistons with Coated skirt (multiple compression options)
Cometic Base & MLS Head gasket included
Rings file-fit and pre-gapped
Cleaned, oiled, and ready to drop on
Designed for power, reliability, and proper ring seal
11:1
11.5:1
12:1
Shop67 M8 Big-Bore Kits form the foundation of a correct M8 build, whether combined with stock cylinder heads or a complete Shop67 head and cam package.
Built right. Built once. Built by Shop67.
——————-——————-——————-——————-
Not sure which compression ratio, camshaft, or head package to run with your Big-Bore Kit?
Don’t guess—and don’t mismix parts. We build these combinations every day and know what works.
Email shop67parts@gmail.com and we’ll spec a setup that matches your fuel, riding style, and performance goals—so it runs hard, lives long, and makes real power.
Shop67 M8 Big-Bore Kits are built for riders who want real power, durability, and consistency—not just a pile of parts.
Each kit starts with brand-new cylinders machined to accept gen 1 or gen 2 cyl heads that are torque-plate honed in-house to replicate real-world operating stress. This process ensures proper ring seal, reduced blow-by, and long-term reliability. Every kit is matched with forged pistons, chosen for strength, heat resistance, and stability in high-performance applications.
Pistons are paired with file-fit rings that are pre-gapped to spec, eliminating guesswork during assembly and protecting the engine under heavy load and heat.
Before shipping, every kit is thoroughly cleaned, lightly oiled, and packaged ready to install, saving build time and ensuring contamination-free assembly right out of the box.
Multiple compression ratios are available to properly match camshaft choice, fuel quality, and riding style—whether the goal is a strong street build or a more aggressive performance setup.
Kit Features:
Torque-plate honed new cylinders
Forged pistons with Coated skirt (multiple compression options)
Cometic Base & MLS Head gasket included
Rings file-fit and pre-gapped
Cleaned, oiled, and ready to drop on
Designed for power, reliability, and proper ring seal
11:1
11.5:1
12:1
Shop67 M8 Big-Bore Kits form the foundation of a correct M8 build, whether combined with stock cylinder heads or a complete Shop67 head and cam package.
Built right. Built once. Built by Shop67.
——————-——————-——————-——————-
Not sure which compression ratio, camshaft, or head package to run with your Big-Bore Kit?
Don’t guess—and don’t mismix parts. We build these combinations every day and know what works.
Email shop67parts@gmail.com and we’ll spec a setup that matches your fuel, riding style, and performance goals—so it runs hard, lives long, and makes real power.
