Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit
Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit
Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit
Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit
Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit
Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit
Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit
Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit
Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit
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Heavy Hitter 420 Primary O-Ring Chain Drive Conversion KitHeavy Hitter 420 Primary O-Ring Chain Drive Conversion KitHeavy Hitter 420 Primary O-Ring Chain Drive Conversion KitHeavy Hitter 420 Primary O-Ring Chain Drive Conversion KitHeavy Hitter 420 Primary O-Ring Chain Drive Conversion KitHeavy Hitter 420 Primary O-Ring Chain Drive Conversion KitHeavy Hitter 420 Primary O-Ring Chain Drive Conversion KitHeavy Hitter 420 Primary O-Ring Chain Drive Conversion KitHeavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit

Heavy Hitter 420 Primary O-Ring Chain Drive Conversion Kit

Price:
$145.00

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This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.p65warnings.ca.gov.

  • 5 stars: 2 (40%)
  • 4 stars: 0 (0%)
  • 3 stars: 1 (20%)
  • 2 stars: 1 (20%)
  • 1 star: 1 (20%)
K
Ken W.

Perfect fit. Easy install. Top notch. A++++

Ken W. review photo
C
Carter

The product looks nice and has very simple instructions. I am have troubles with the chain over heating severely . I have gone through 4 chains setups averaging about 2 charges per chain. Idk if my setup is pushing too much but I wouldn’t think so.

E
Easton

Love the conversion kit except it was really hard to out on my 2024 eride pro ss 2.0 but i got ot woth tue help pf my dad. I moved the motor all the way forward and the chain was still 1-2 mm off of the next link.

T
TOBIAS THOMASON

Sprockets were well built but the chain was trash( each link was fused together and did not freely move )

L
Louis

Great product

Description

The Heavy Hitter 420 Primary Chain Drive Conversion Kit is the lightest 420 primary kit on the market for the Sur Ron LBX, Segway X160/X260, E Ride Pro, Ventus ONE+, and 79Bike Falcon platforms. Built for riders who have pushed stock belts past their limits with upgraded motors and controllers. Pairs a 7075-T6 billet aluminum rear sprocket with a nitrided 52100 tool steel front sprocket and a Japanese non-O-ring chain for maximum efficiency and long life.

Fitment:

  • Sur Ron LBX / S (2017-2025 Year Models Only) 
  • Segway X160 / X260
  • E Ride Pro S / SS / 2.0
  • E Ride Pro 3.0 / 4.0 / SR (MUST Use Surron Side Outwards)
  • Ventus ONE+ (NON SPLINE SHAFT MOTORS)
  • 79Bike Falcon Pro / GT (NON SPLINE SHAFT MOTORS)

Download Tech Sheet (Assembly & Torque Specs)

NOTE: EBMX XLB Series Motors MUST be properly shimmed or you will have side wear to the sprockets. When installing, chain tension must be loose never tight. Any chain drive should have loose chain tension. Installation and detailed setup info here.

No rubber dampers means no efficiency loss, no extra heat, and no debris shelf for chain links to pack into. Maintains OEM gear ratio and motor alignment. Precision machining extends sprocket life and keeps performance smooth at high RPM. This kit is louder than a belt no avoiding that but no louder than any other chain kit. Master link included for easy chain swaps. Mounting bolts for the 30T sprocket are not included; reuse the OEM bolts.

Chain drive conversion kits increase friction, noise, and heat.  You will experience less power, less range, and produce more noise with these kits.