sp125racing
Follow us at
  • sp125racing
  • Honda RS125
    • RS125 Genuine Honda HRC Parts
    • RS125 Engine Parts
    • VHM Piston Height Tool Guide
    • RS125 Chassis Parts
    • RS125 Honda Wheels Tyrewarmers Sprockets
    • RS125 Honda Crash Protectors
    • RS125 Honda Brembo Brakes
    • RS125 Honda Handlebars Levers & Footpegs
    • RS125 Honda Stands
    • RS125 Honda Quickshifters
    • Battle Shifter Fitting Instructions
    • RS125 Special Tools
    • RS125 Honda Fairings
    • RS125 Honda Seats
    • RS125 Honda Mudguards
    • HRC Datalogger & Detonation Counters
    • Detonation Detection System
    • Replacement for HRC Detonation Lead
    • RS125 16 Setting Ignition Curve Changer
    • RS125 Ignition Pulse Simulator
    • RS125 Throttle Position Sensor Checker
    • RS125 Gear Change Light
    • RS125 Powerjet Controller
    • RS125 Powervalve Controller Box
    • RS125 High Viz Temp Gauge
    • RS125 Ni-MH Battery Pack
    • RS125 Honda How To Order
  • HRC Setting Data & Maintenance Information
    • RS125R / RS250 Basic Concept of Power Jets
    • RS125 / RS250 Settings using Detonation Counters
    • RS125 / RS250 Settings according to seasonal conditions
    • RS125R / RS250R Functions of carburetor parts
    • RS250R Carburetor Settings
    • RS125R Parts Combination according to model years
    • RS250R Parts Combination according to model years
    • RS125R / RS250R Optimizing riding position
    • RS125R / RS250R Suspension Settings vol.1
    • RS250R Suspension Directionality
    • RS125R / RS250R Points of engine and frame assembly
    • RS125R / RS250R Notes on Engine Maintenance
    • RS125R / RS250R Notes on Frame Maintenance
    • RS125R / RS250R Conservation for engine power
    • RS125R / RS250R Running In / Warming Up / Position Adjustment
  • Honda RS250
    • RS250 Genuine Honda HRC Parts
    • RS250 Engine Parts
    • RS250 Chassis Parts
    • RS250 Handlebars, Levers & Footpegs
    • RS250 Brakes
    • RS250 Honda Stands
    • RS250 Honda Quickshifters
    • RS250 Bodywork
    • RS250 Bike Specification 2008
    • RS250 16 Setting Ignition Curve Changer
    • RS250 Ignition Pulse Simulator
    • RS250 Honda How To Order
  • Honda NSF250R
    • NSF250R Genuine Honda HRC Parts
    • NSF250R Engine Parts
    • NSF250R Honda Wheels Tyrewarmers Sprockets
    • NSF250R Honda Handlebars Levers & Footpegs
    • NSF250R Chassis Parts
    • NSF250R Honda Crash Protectors
    • NSF250R Honda Stands
    • NSF250R Honda Quickshifter
    • NSF250R Bodywork & Airbox Parts
    • NSF250R Honda How To Order
    • NSF250R High Viz Temp Gauge
  • Nova Gearbox - KTM Moto3
  • Terms and Conditions
  • Steve Patrickson Profile
  • Race Team Archives
    • 2023 sp125racing Team
    • 2022 sp125racing Team
    • 2021 sp125racing Team
    • 2020 sp125racing Team
    • 2019 sp125racing Team
    • 2018 sp125racing Team
    • 2017 sp125racing Team
    • 2016 sp125racing Team
    • 2015 sp125racing Team
    • 2014 sp125racing Team
    • 2013 sp125racing Team
    • 2012 sp125racing Team
    • 2011 sp125racing Team
    • 2010 sp125racing Team
    • 2009 sp125racing Team
    • 2008 sp125racing Team
    • 2007 sp125racing Team
    • 2006 sp125racing Team
    • 2005 sp125racing Team
    • 2004 sp125racing Team
    • 2003 sp125racing Team
    • 2002 sp125racing Team
    • Tom Carne Profile
    • Jordan Weaving Profile
    • Rob Guiver Profile
    • Brad Ray Profile
    • Chrissy Rouse Profile
    • Matt Davies Profile
    • Ben Barrett Profile
    • Matthew Hoyle Profile
    • Lee Costello Profile
    • Nicole McAleer Profile
    • Connor Behan Profile
    • Luke Hinton Profile
    • Jordan Malton Profile
    • Dan Moreton Profile
    • Michael Smith Profile
    • Luke Jones Profile
    • Jamie Ashby Profile
    • Mark Clayton Profile
    • Joel Marklund Profile
    • Elliot Lodge Profile
    • Elliot Lodge 2018 Profile
    • Elliot Lodge 2019 Profile
    • Harvey Claridge 2018 Profile
    • Harvey Claridge 2019 Profile
    • Franco Bourne 2019 Profile
    • Calum Beach 2019 Profile
    • Jeremy Knight 2019 Profile
    • Cameron Horsman 2019 Profile
  • Contact
  • 2022 Race Dates
  • 2023 Race Dates

Power-jet controller system
RS125 / RS250 Honda


Please  'Refresh' this page every time you visit.         If it is slow to reload, you know then that this page has been updated since your last visit.


Power-jet controller system for standard Honda RS125 / RS250

This is a great little add on for the RS125 & RS250 Honda.        


Overview  
With higher compression fuels there is a requirement to lower the power-jet cut-off rpm point.  
This is not adjustable on the standard ignitions.  
The Power-Jet controller system allows you to change the power-jet cut-off rpm point.  
The unit also includes a lower throttle roll-off point to reduce engine damage on slow rolling-off the throttle.        


On the RS125 PJ controller system a single 16 position switch selects the RPM point.  
On the RS250 PJ controller system 2 separate 16 position switches control each power-jet independently.
Model A
Switch Position   
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

For Leaded Fuel   
Cut-off RPM   

11,500   
11,600   
11,700   
11,800   
11,900   
12,000   
12,100   
12,200   
12,300   
12,400   
12,500   
12,600   
12,700   
12,800   
12,900   
13,000 
Model B
Switch Position   
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

For Un-Leaded Fuel   
Cut-off RPM   
  
12,000   
12,100   
12,200   
12,300   
12,400   
12,500   
12,600   
12,700   
12,800   
12,900   
13,000 
13,100
13,200
13,300
13,400
13,500

Operation     
. The power-jet un-powered is adding fuel, on powering the power-jet this shuts off this fuel jet.     


. Below the Low RPM level at 3000 RPM the jet is not powered to ease starting on generator.     


. If the throttle is disconnected the jet is down powered to add fuel and ensure a safe fuel level.     


. In normal operation as the throttle level is increased the jet opens (down powered) to add fuel,  on decreasing (roll-off) the power jet stops adding fuel at a lower throttle level  to reduce the leaning off ( and subsequent detonation if fuel permits).     


. With high throttle and increasing RPM the jet will cut-off at the RPM level set by the selector switch,  if the RPM falls at this throttle then the jet will operate at 300RPM below the cut-off point selected,  this reduces the jittering if the RPM is held around the cut-of point.
Picture

Wiring     
The unit connects to the Taco to obtain the power and the rpm signal, the unit also connects to the throttle signal to  control the throttle points, the unit then powers the power jet directly. Mount the unit in the nose of the motorcycle     


Connections  
In the nose cone, at Rev Counter or Wire Harness to Rev Counter connection:  
Green to Rev Counter Green wire  
Blue to Rev Counter Blue wire  
Black to Rev Counter Black wire     


In the air-box:  
Yellow to yellow with blue at the throttle  
Disconnect the 2 pin power-jet connection  
Connect the black to power jet black (not connected to the loom)  
Connect grey to power jet grey (not connected to the loom)
Connections
Voltage range
Input Current  
Drive current3A maximum   
Temperature range 
Weight   
Low RPM level
Throttle fail below
Operational throttle
Rpm Hysteresis
Connections
9V to 18V
5mA nominal 
3A maximum 
-10 deg Celsius to +130 deg Celsius
Approx 50g
3000 RPM   
200mV
2.9V throttle-on 1.9V throttle-off
300RPM


In Stock now           

RS125 Honda Power-jet controller system   :   £200.00 + VAT        
RS250 Honda Power-jet controller system   :   £240.00 + VAT

Exports of all parts supplied outside of UK, to EU Countries, USA, Australia, South Africa, Asia etc are exempt from UK VAT and will be charged 0% VAT.
On arrival to your destination country, you may be asked to pay additional duties and taxes by customs, before the shipment is delivered.
Import tax, customs & duties regulations vary from country to country.
​Payment of all Import tax, customs & duties charges are the responsibility of the customer.

return to honda rs125
RETURN TO HONDA RS250
home
SP125 Limited
22 Walker Wood,  Baildon,  Shipley,  West Yorkshire,  BD17 5BE,  England
Telephone 01274 583231      steve@sp125racing.com      Mobile 07738 626165
Picture
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.
Powered by Create your own unique website with customizable templates.