Rear Drive Belt for Stock MX4, MR4BC

Rear Drive Belt for Stock MX4, MR4BC & MX4 Prototype – The Right Fit, No Guesswork

Looking to keep your classic Yokomo MX4, MR4BC, or that sweet MX4 Prototype running smooth? You’ll need the rear drive belt that actually fits — no more messing with wrong sizes or sketchy alternatives.

✅ What You Want:

Part 132‑3M‑6, 44-tooth

• Perfect Drop-in Fit: For stock MX4, MR4BC, and the MX4 Prototype. Exactly what Yokomo intended.

• Built to Last: Neoprene with glass-fiber reinforcement — tough enough for serious track time.

• OEM Specs: 132mm length, 3mm pitch, 6mm wide — a 44-tooth beauty that won’t let you down.

 

---

🔧 Why It Matters:

• 🔹 No Slips, No Stretch – Reliable power delivery right to your wheels.

• 🔹 Race-Ready Replacement – Forget downtime. Pop this in and hit the track.

• 🔹 Period-Correct Part – Keeps your vintage Yokomo proper.

---

🔍 Pro Tip:

While you're at it, check your pulleys and tensioners — worn parts kill belts faster than you think.