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Rolling Wrench

A/C CDI Coil Combo 150cc QMJ157/49cc QMB139 (Plug & Play)

A/C CDI Coil Combo 150cc QMJ157/49cc QMB139 (Plug & Play)

$129.00 USD
$154.00 USD $129.00 USD
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This is the ultimate EVI for GY6/QMJ157 150 cc and QMB139 50 cc systems. If your scooter feels held back by the stock rev limiter or weak spark, this CDI + coil combo is the fix. It’s a micro-processor ignition that removes the rev limit and sends about 32,000 volts to the plug—stronger spark, better throttle response, and more of the power your engine already has.

Install is super straightforward: it’s 100% plug and play. Unplug your old CDI and coil, plug this into your existing CDI connector, and you’re in business. The included 38" plug wire lets you tuck the EVI almost anywhere—if it’s too long, it can be trimmed down. Simple upgrade, big difference on the road.

The Details

This EVI replaces both your stock CDI box and ignition coil with one compact, micro-processor controlled unit. It’s designed specifically for A/C CDI systems on GY6 QMJ157 and QMB139 platforms, giving you a stronger, more consistent spark and removing the factory rev limiter.

  • Integrated performance CDI + ignition coil in one housing
  • Outputs roughly 32,000 volts at the spark plug
  • Rev limiter deleted for full RPM potential (use common sense with engine limits)
  • Micro-processor timing control for improved performance
  • Plug and play – plugs into your existing CDI connector
  • Works on GY6 QMJ157 150 cc and QMB139 50 cc engines
  • Includes a 38" plug wire that can be shortened to fit your layout

If your current ignition is getting tired, or you’re chasing better throttle response to match other upgrades (exhaust, CVT, etc.), this EVI is a clean way to modernize the whole system in one shot.

Important Things to Note

This CDI coil combo is designed for A/C CDI boxes only on GY6 (QMJ157 / QMB139) engines.

This will not work on DC models.

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