2008 CRF 450 TPS question

I get 5 ohms with it installed. Check again while twisting the throttle and se if you get a reading. If you do install and adjust until you get 5. Then adjust at idle 1800 rpm.

A TPS is nothing more than a potentiometer (see attached picture) as the wiper rotates across the circuit it creates higher and lower resistance depending on its location. If you’re not getting resistance between blue and black then I would assume the tps is bad or there’s a break/ pinch in the wire... the resistance between the blue and black is the overall resistance of the the circuit and the yellow is the output... so if you have no reading there’s a break somewhere in the circuit... the Yellow
Wire is what feeds voltage (based upon the sweepers position) ]back to the ecu... so you would check between yellow and black to determine your where your adjustment should be... to find the correct value multiply the total resistance of the circuit (blue to black) first by .13 then multiply the total resistance by .15... this provides you your range... Measure between the black and yellow with it installed at the butterfly closed position/ base idle... bike does not have to be running... most FCRs I’ve found tend to be adjusted between 720 and 780 ohms... it’s not as critical on the carbureted bikes so as long as you’re close to the ball park it should be ok...