crf450 carb on a yzf? tps plug

6 replies to this topic
  • tdd6405

Posted June 17, 2004 - 05:54 AM


i know it will work, but if you put one on, is the tps plug the same, or do you just have to run without the tps? i know the crf carb is a 40mm, adn the yzf a 39. a friend of mine did the conversion but i never asked him about the tps.

  • XXX_Thumper

Posted June 17, 2004 - 06:08 AM


TPS doesn't matter. Most everyone here runs with it disconnected already.

  • gonzo

Posted June 17, 2004 - 07:56 AM


Well there is 2 things here. First if you want to connect the TPS the plugs may be different. If they are your screwed unless you are really good with electrical. Second is tht TPS is going to be setup for a Honda motor.

I would just leave it disconnected. You'll have added horsepower from the bore size and it will be nice and mellow.

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  • Fastest1

Posted June 17, 2004 - 06:43 PM


I dont think there are any differences in the TPS itself, maybe the connection would need to be changed. Why do you want to go to a larger carb? More top?

  • FFRacing79

Posted June 18, 2004 - 01:44 AM


The connectors are different, but are easily changed. Then just set the sensor to the specs given in the manual...or leave it disconnected. I run a RHC modified CRF carb on mine.

  • Davidyz450

Posted June 19, 2004 - 12:52 PM


Usually most throttle positon sensors have a reference voltage to the sensor (usually 5 or 12 volts) a ground and a signal return to the computer or ignition's a potentiometer. You can check the resistances of the 2 sensors and see if they are similar at the same throttle positions. And if so solder the wires of the yz plug on the crf carb. In the end it would probably be better to keep it disconnected.

  • FFRacing79

Posted June 19, 2004 - 06:12 PM


You don't have to solder the wires...just remove the individual wires from the connector and reinstall them in the other one. The sensors are the same, just the plugs are different.

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