5-7
B A S I C D Y N O O P E R A T I O N
Connecting the RPM Pickup
Version 4
Above Ground Model 250i Motorcycle Dynamometer Installation Guide
C
ONNECTING
THE
S
ECONDARY
I
NDUCTIVE
P
ICKUP
If the primary wire is not accessible connect a secondary inductive pickup to an
available spark plug wire. The secondary inductive pickup cannot be in contact with,
or its connecting wire be crossing other engine electrical wires or stray RF interference
may result.
The inductive pickups contain a fragile Ferrite Core that is sensitive to
engine heat and vibration. Do not drop the inductive pickup or snap the
pickup closed. Use extreme care in handling and placement of the
pickups.
1
Clip the secondary inductive pickup around one spark plug wire.
2
Route the inductive pickup cable clear of devices that produce electronic noise
(spark plug wires, coil wire, coil etc.).
Note:
Inductive pickup placement is important. Position the inductive pickup so
that it is not making contact with any other spark plug wires. Separate the spark
plug wire from the spark plug wire bundle for proper operation.
Note:
You must ground the vehicle to the dyno for the electronics to function
properly. Refer to “Grounding the Vehicle” on page 5-9.
Note:
When using one secondary pickup, disconnect the other pickup from the
dyno electronics.
Figure 5-4: Tachometer Pickup Secondary Inductive
connect a secondary
pickup to an available
spark plug wire
