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Vehicle Info NeededMSD IGNITIONPART NUMBER: 121-4253
Enhancer Ignition Control Module 1990-93 Yamaha SJ650/SJ701 Super Jet
$46795
Ships on Oct 15, 2026
Lowest Price GuaranteeCurrently Unavailable
This product is currently not available. Please call customer service for assistance at 1-800-345-4545.
Yamaha
Enhancer Ignition Control Module1990-93 Yamaha SJ650/SJ701 Super Jet
MSD 4253 Features:
If you own a Yamaha with a 650 or 701 engine, this Enhancer is a necessity! The Enhancer produces a powerful spark with increased spark duration. Not only does the improved spark energy boost power, but this Enhancer features a more aggressive timing curve for even more power to get you going! At lower rpm you'll notice incredible acceleration and throttle response due to advancing the timing. Then as the rpm increases, the timing is retarded to the factory setting to prevent detonation and engine damage. For racers, there is also a lower rpm limit that you can activate for quick and consistent holeshots. By activating a switch mounted on the handlebar the rpm will limit at approximately 3,000 rpm. The instant the button is released, the rpm revs up just as normal and you rocket off. Everything you need to install the Yamaha Enhancer is supplied along with factory connectors for a direct plug-in installation!- High output sparks improve throttle response, starting and top end power.
- Factory style connectors for a direct plug-in installation.
- Bolt in place of the factory ignition.
- Designed to bolt in place of the factory ignition
- Adjustable rev limiter
- Up to 4x the spark energy
- Reduces spark plug fowling
Improved Spark Energy to Boost Power
MSD Powersports Enhancer Ignition produces high output sparks, improved throttle response and an aggressive timing curve for improved power. Includes factory-style connectors for an easy, direct plug-in installation.
Features:Part TypeIgnition Control Module
Product LineMSD Powersports Enhancer Ignition
BrandMSD IGNITION
Package Height3.6
Package Width6.8
Package Length7.2
Weight1.3 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Package Qty1
Package TypeEA
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