22 Walker Wood,  Baildon,  Shipley,  West Yorkshire,  BD17 5BE,  England

Telephone 01274 583231      steve@sp125racing.com      Mobile 07738 626165

www.sp125racing.com

RS125 / RS250 Honda & TZ250 Yamaha

This unit generates the pulse waveform of a running RS125 / RS250 Honda & TZ250 Yamaha engine and is freely adjustable between 4,000 and 14,000 RPM.

The CDi and engine electronics will think that the engine is running and respond accordingly.

Test the operation of:

          CDi units

          Tachometers

          Ignition coils

          Power jet action

          Throttle potentiometer action

          Power valve movement and position

It also can be used to map or check ignition advance and spark voltage

Powering up the motorcycle

The safest place to connect a power source is into the loom at the connector to the regulator unit.

Disconnect the regulator unit as it will drain power.

The connector is a four pin clear connector.

Red/green/yellow/yellow

The operational voltage range of the RS125 is 12V to 15V below this voltage the tachometer will drop in RPM and the power jet will be slow.

The current supply is 1A to 2.5A depending on RPM and power-jet action.

Use a 12V-15V 4Ah battery or greater capacity

Turn off the kill switch

Connect battery negative to the green Wire

Connect battery positive to the red wire

Caution: the black wire is switched by the kill switch do not connect to this wire

Connecting the simulator

Disconnect the grey square two pin connector of the pick-up pulse sensor, connect:

Yellow crock clip to the yellow/white wire connection

Blue crock clip to the blue/white wire connection

Connect the Red crock clip to the battery positive.

The red indicator will flash.

Turn on the kill switch the ignition coil will buzz

Caution:

Care must be taken as ‘burning off’ of fuel in the cylinder can cause a pop on first powering up!

Do not have any rags or loose items in the inlet port as these could be sucked in.

Testing bike systems

CDi

Check for constant spark noise over the RPM range, look at the clarity of the spark if the plug is removed ( take care on correct connection to the chassis of plug earth)

Tachometer

Check the tachometer runs freely as the RPM is increased and does not stick at any location, changing the RPM over the full range rapidly does not make the tachometer jolt or overshoot.

Power jet

Below 4000RPM the power jet will be down powered (fuel on position)

Going up to 6000RPM with the throttle off the power jet will be powered (listen for the tink noise after 4000RPM)

Bring the throttle on and listen for the power jet action around ¾ throttle (a tonk noise)

Flick the throttle around this area and listen to the power-jet response time.

Bring the RPM to up around 12,000RPM to 13,000RPM on full throttle; the power jet will shut off.

Catch tank solenoid

Set the rpm above 4000RPM bring the throttle off the bottom stop, blow through the pipe to to check that the solenoid blocks the flow on throttle off and lets air through on throttle.

Exports of all parts supplied to outside EC Countries are exempt from UK VAT

Exports to EC Countries are exempt from VAT if a valid VAT registration number is supplied

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SP125 Limited Disclaimer

Honda, HRC and all other parts supplied by the SP125 Limited are not guaranteed when used in competition events.
As such, it is a condition of our making all parts available that it is solely the decision of each individual, rider, team member or team whether they choose to use any part supplied and in doing so, absolve the manufacturer and SP125 Limited of any or all such claims, including damage to equipment and/or injury to personnel irrespective of how caused.
All parts remain property of SP125 Limited until paid for in full.

All 'special order' parts, that are ordered specially under the instruction of the customer, are non returnable and non refundable.