throttle switch on yfz 450? - Yamaha Forum : Your Yamaha Motor Products Community & Resource

nxgenbrozracing · 05-22-2010, 09:20 AM

ok I just purchased a yfz 450 and it was supposed to be perfect well guess what it hs issues i was wondering if someone could answer some questions for me....
there is a switch in the throttle housing on the handle bars that tell something when the the throttle is closed. I have done a bunch of checking and the motor has not spark at idle if i take the slack out of the throttle (away from the switch) it will start and idle just fine....any ideas?

itsmygame · 05-23-2010, 07:01 PM

Not exactly sure what it does, give me a day to look it up and see.

84ls1_transam · 10-02-2010, 07:55 PM

mine was doing the same thing. splice the 2 wires together.

YAMAPR031 · 02-07-2012, 10:02 AM

i think its the T.O.R.S SWITCH LOTS OF YAMIS HAVE IT. BASICLY YOU HAVE 2 SWITCHES 1 AT THE THUMB THROTTLE AND 1 AT THE CARB. ONLY 1 IS OPEN AT A TIME SO IF IT DETECTS BOTH OPEN AT ONCE IT LIMITS RPM TO 2500-3000 ITS A SAFETY FEATURE YOU CAN BYPASS IT BUT I MYSELF WOULDNT!!! ALOT OF TIMES YOU JUST NEED TO SET THE CABLE SLACK AT BOTH ENDS PER THE MANUAL

wicked_dean · 02-16-2012, 10:14 PM

check out yfzcentral.com for all your yfz ?'s

05-22-2010, 09:20 AM	#1
nxgenbrozracing Junior Member Join Date: May 2010 Posts: 1	throttle switch on yfz 450? ok I just purchased a yfz 450 and it was supposed to be perfect well guess what it hs issues i was wondering if someone could answer some questions for me.... there is a switch in the throttle housing on the handle bars that tell something when the the throttle is closed. I have done a bunch of checking and the motor has not spark at idle if i take the slack out of the throttle (away from the switch) it will start and idle just fine....any ideas?

02-16-2012, 10:14 PM	#5
wicked_dean Junior Member Join Date: Feb 2012 Posts: 4	check out yfzcentral.com for all your yfz ?'s __________________

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05-23-2010, 07:01 PM	#2
itsmygame Sand Expert Join Date: Oct 2008 Location: Calimesa, CA Bike: 06' YFZ450-x2 YFM250 Posts: 838 View My Albums	Not exactly sure what it does, give me a day to look it up and see.

10-02-2010, 07:55 PM	#3
84ls1_transam Junior Member Join Date: Sep 2010 Posts: 5	mine was doing the same thing. splice the 2 wires together.

02-07-2012, 10:02 AM	#4
YAMAPR031 Junior Member Join Date: Feb 2012 Location: MICHIGAN Bike: 01 srx700,07 YFZ450 Posts: 12	i think its the T.O.R.S SWITCH LOTS OF YAMIS HAVE IT. BASICLY YOU HAVE 2 SWITCHES 1 AT THE THUMB THROTTLE AND 1 AT THE CARB. ONLY 1 IS OPEN AT A TIME SO IF IT DETECTS BOTH OPEN AT ONCE IT LIMITS RPM TO 2500-3000 ITS A SAFETY FEATURE YOU CAN BYPASS IT BUT I MYSELF WOULDNT!!! ALOT OF TIMES YOU JUST NEED TO SET THE CABLE SLACK AT BOTH ENDS PER THE MANUAL