Yamaha YZF250 Ignition Unit (2001 - 2002) mod 030416P1

Advantages are a peak power increase the ability to over rev the machine and hold the gear longer before up-shifting, which particularly benefits short circuit courses.

However, this modification does lose a small amount of power at low to midrange.

EDC Unit


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Ignition Map of Unit Before/After Service (TPS Disconnected)

EDC Graph

FAQ's for Yamaha YZF 250 (2001 - 2002) ECU Service:
Will the service give more BHP?
A: There is no real power increase, BUT the RPM is higher and therefore each gear can be held longer to save on gear changes.
How much is the F/A altered on this service?
A: The F/A mix will be shifted by approx 11% from standard, meaning that for example when the engine is running at 10000RPM it will be fuelling for 9100RPM. In most of the ECU's that we have completed the F/A has not had to be changed by re-jetting. However, sometimes engines running ALCOHOL (Methanol) have required recalibration where extreme tuning has taken place. If in doubt, get your F/A checked by your tuner.
Will an aftermarket alarm system or immobilizer still work with this modified ECU?
A: Yes absolutely no changes have been made to the electrical operation of the ECU.
Will the Tachometer still read as before or has the service changed this?
A: No TACHO fitted to this machine as standard.
My bike is fitted with a NON STANDARD exhaust system/can, will this service still work as shown?
A: The ECU will still operate as described above, but as mentioned, if you are in ANY doubt, then please get your tuner to check your F/A ratio to be sure that all is correct.

WARNING!, After having this ECU service it is strongly advised that your tuner check your FUEL/AIR ratios throughout the RPM range as changes may be required after this service.

This kind of service does NOT guarantee to increase power as it is used primarily on modified engines and to extend the RPM range for racing purposes.

WARNING: These modifications are advised with caution due to stresses caused by the additional RPM available to the rider and are only suitable for a race prepared engine, which can handle the additional RPM available. Please consult your Tuner or Garage if ANY in doubt.

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