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Rolling Wrench

GY6 Stage 1 Engine Package - 172cc

GY6 Stage 1 Engine Package - 172cc

$468.00 USD
$468.00 USD
Sale Sold out
Shipping calculated at checkout.
Want to upgrade to stage 2? 👉 Click here!

Feeling like your GY6 just doesn’t have the power it should? 🐌➡️💨 This complete **172cc Stage 1 engine upgrade** gives you stronger acceleration, better uphill pull, and a huge gain in real-world torque — all **without** boring the engine case.

  • 🔥 Max displacement for stock GY6 engine cases
  • 🛠️ Huge durability jump vs. factory parts
  • 🏆 Best power upgrade before going full race builds

The Details ⚙️

The **172cc setup** is the sweet spot for **daily-ride reliability + real power** gains. You’re replacing low-grade OEM components with high-quality Taiwanese parts that can take heat, boost power, and stay reliable for thousands of miles.

Pick your build style:

💪 Full ProBld (Forged Piston) – Performance + Longevity

  • 4032 **forged piston** — stronger, runs cooler
  • Rings **professionally installed & measured**
  • ProBld **big-valve head (28mm / 23mm)** w/ hardware
  • 5-axis CNC **adjustable clocking flange**
  • NGK **spark plug** included
  • ProBld **performance cam** — fast spool + strong pull

Full Rolling Wrench (Cast) — Budget Friendly + Less Work

  • Cast piston
  • Rings pre-measured and installed
  • ProBld big-valve head (28 mm / 23 mm)
  • ProBld camshaft tuned for torque
  • Clocking flange + NGK spark plug included

💵 Full NCY (Cast Piston) – Budget Friendly + Reliable

  • Cast piston — great for everyday use
  • You will gap/install piston rings (DIY step)
  • NCY **big-valve head** — we include the missing hardware
  • 5-axis CNC **clocking flange** included
  • NGK **spark plug** included
  • NCY **smooth torque cam** for daily riding

Quick takeaway: ProBld = Stronger + cooler + less setup work NCY = Affordable + reliable daily upgrade

What's Included 📦

  • 172cc **cylinder + piston** (ProBld or NCY depending on kit selected)
  • **Big valve cylinder head** with hardware
  • **Performance camshaft**
  • **Adjustable clocking flange**
  • **NGK spark plug**
  • All required **gaskets + small parts**

Fitment 🔍

  • QMJ157 GY6 long-case engines only
  • Honda Ruckus w/ **GY6 swapped** engine
  • Maddog / stretched GY6 builds
  • Most **150–232cc GY6** scooters & buggies

Check your engine code before ordering. It’s stamped on the left-side near the center stand pivot.

Important Things to Note 🚨

  • Fits QMJ157 engines only.
  • No engine boring required — installs in stock cases.
  • Buggies/go-karts: spacing varies, confirm first.

If you're unsure — send us a pic of your engine code and setup 👍

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