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lari · 08-12-2009, 03:24 PM

i recently restored a fazer 1000 with a big crash...now it,s almost perfect i´m having problems with the exup valve.
there´s no malfunction or code..i checked exactly like the worksop manual..cables, conections,and electric motor(this one works fine with code 53 (testing sensors & actuators) but the bike continuously missfire when i shut off the acelerator...
this valve must to be closed when idle???
with everything conected there´s no move on the valve along all the rpm´s

sorry about my english friends!!

seruzawa · 08-12-2009, 04:12 PM

Sounds like the valve is broken.

pushrod · 08-13-2009, 06:40 AM

This is a wild guess, but are you sure you have no intake leaks?

That is, assuming you are backfiring and not just misfiring. And the backfiring is from the intake.

If you are getting backfire from the pipe, you may have a fueling problem.

sarnali2 · 08-13-2009, 07:19 AM

Quote:

Originally Posted by lari

i recently restored a fazer 1000 with a big crash...now it,s almost perfect i´m having problems with the exup valve.
there´s no malfunction or code..i checked exactly like the worksop manual..cables, conections,and electric motor(this one works fine with code 53 (testing sensors & actuators) but the bike continuously missfire when i shut off the acelerator...
this valve must to be closed when idle???
with everything conected there´s no move on the valve along all the rpm´s

sorry about my english friends!!

I don't think much of my English friends either.

I'm assuming the valve is free and actually moves by hand? Did you try hooking an amp meter to the valve and increasing the throttle? I would assume you'd get an increase in amps as the RPM increase telling the valve to open..That would tell you if the valve was getting a signal or not

lari · 08-13-2009, 08:40 AM

i´m going to refrase the question: the exup valve moves freely on the muffler by hand,but there´s no move in all the rpm range. the servo motor works fine whith the testing mode(close and open).
if the valve is always open. could i have backfirings??

MOKE1K · 08-13-2009, 11:02 AM

Sarnali2 is correct you should get a reading while twisting the throttle open. Iam curious to know if the test you did on the servo motor is accurate and matches the spesifications in the Yamaha manual?

lari · 08-14-2009, 02:53 PM

Quote:

Originally Posted by MOKE1K

Sarnali2 is correct you should get a reading while twisting the throttle open. Iam curious to know if the test you did on the servo motor is accurate and matches the spesifications in the Yamaha manual?

there´s a specific test for the valve on the worksop manual.i did it and it´s all under the spec. but when i start the bike there´s no move on the valve, and i think that when the bike´s idling it must close the valve and open at ???rpm´s

ps:there´no leaks of any kind...i tested just in case!!

The_AirHawk · 08-14-2009, 03:34 PM

Quote:

Originally Posted by lari

there´s a specific test for the valve on the worksop manual.i did it and it´s all under the spec. but when i start the bike there´s no move on the valve, and i think that when the bike´s idling it must close the valve and open at ???rpm´s

ps:there´no leaks of any kind...i tested just in case!!

Component bench-testing only gets you so far - can you remove enough stuff to see if the valve moves when the bike is running? If not, and you're getting proper signal to the valve - even if it "tests" OK - the servo's bad. Plain and simple.

seruzawa · 08-14-2009, 05:06 PM

Possibly the servo motor in the valve has gone bad.

MOKE1K · 08-15-2009, 09:00 AM

Quote:

Originally Posted by lari

there´s a specific test for the valve on the worksop manual.i did it and it´s all under the spec. but when i start the bike there´s no move on the valve, and i think that when the bike´s idling it must close the valve and open at ???rpm´s

ps:there´no leaks of any kind...i tested just in case!!

The servo motor should adjust itself as soon the key is turned on. If its not performing this procedure then it may not be opening at all when your riding it.

08-12-2009, 03:24 PM	#1
lari Registered Member Join Date: Jul 2009 Posts: 22	exup !!$%&/&% i recently restored a fazer 1000 with a big crash...now it,s almost perfect i´m having problems with the exup valve. there´s no malfunction or code..i checked exactly like the worksop manual..cables, conections,and electric motor(this one works fine with code 53 (testing sensors & actuators) but the bike continuously missfire when i shut off the acelerator... this valve must to be closed when idle??? with everything conected there´s no move on the valve along all the rpm´s sorry about my english friends!!

08-12-2009, 04:12 PM	#2
seruzawa Robby Join Date: Nov 2001 Location: 8501 ft. Posts: 16,803	Sounds like the valve is broken. __________________ I've seen things you people wouldn't believe. Attack ships on fire off the shoulder of Orion. I watched c-beams glitter in the dark near the Tanhauser Gate. All those moments will be lost in time, like tears in the rain.

08-13-2009, 06:40 AM	#3
pushrod Founding Member Join Date: Nov 2001 Location: Baja 'Bama Posts: 3,478	This is a wild guess, but are you sure you have no intake leaks? That is, assuming you are backfiring and not just misfiring. And the backfiring is from the intake. If you are getting backfire from the pipe, you may have a fueling problem. __________________ You would not understand, this is not how I am... I have become - Comfortably Numb.

08-13-2009, 11:02 AM	#6
MOKE1K Registered Member Join Date: Jul 2008 Location: Kalapana, Big Island Posts: 3,956	Sarnali2 is correct you should get a reading while twisting the throttle open. Iam curious to know if the test you did on the servo motor is accurate and matches the spesifications in the Yamaha manual? __________________ "YOU CAN'T BOLT ON SKILL" "The only thing limiting your bike, is you" We survived Bush you'll survive Obama! "the most fundamental fact about the ideas of the political left is that they do not work. therefore we should not be surprised to find the left concentrated in institutions where ideas do not have to work in order to survive." --thomas sowell

08-14-2009, 05:06 PM	#9
seruzawa Robby Join Date: Nov 2001 Location: 8501 ft. Posts: 16,803	Possibly the servo motor in the valve has gone bad. __________________ I've seen things you people wouldn't believe. Attack ships on fire off the shoulder of Orion. I watched c-beams glitter in the dark near the Tanhauser Gate. All those moments will be lost in time, like tears in the rain.

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08-13-2009, 08:40 AM	#5
lari Registered Member Join Date: Jul 2009 Posts: 22	i´m going to refrase the question: the exup valve moves freely on the muffler by hand,but there´s no move in all the rpm range. the servo motor works fine whith the testing mode(close and open). if the valve is always open. could i have backfirings??