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PostPosted: Tue Jun 02, 2009 2:22 pm 
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Joined: Wed May 06, 2009 7:17 pm
Posts: 210
Current ride: XB12Scg
Location: Herts/Middx
I've spent the morning replacing a Idle Cable and doing a Hard Reset of the TPS.

After cleaning out the crud from the throttle body intake I came accross a worn area where the butterfly valve has worn a groove into the side of the TB.

See Pic..

http://i40.photobucket.com/albums/e236/ ... C00641.jpg

Ignor the white flash seen in the picture but look by the hole & you will see where the BV has worn a groove in the TB ali casting. This creates a sticking point for the butterfly. Is this serious or am I overcausious. :?:

It also makes doing a TPS reset a pain as the butterly sticks.

The wear is probably due to the fact that the TB is at a slight angle forwards, thus the butterfly's weight is forwards as well. Get my drift :?: There is no wear on the other side towards the back end of the bike.

I've only cleaned the area with Carb Cleaner & NOT tried to smooth out this wear as this would cause untold problems.

What do you techs advise :?:

Thanks,

Phil.

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PostPosted: Tue Jun 02, 2009 3:09 pm 
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proff. patpending
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Current ride: Victoria Sponge
Location: Bristol - Gateway to all things good
grillphilbuell wrote:
It also makes doing a TPS reset a pain as the butterly sticks.


At least you know it is closed when doing the TPS reset.

This will not cause a problem as the throttle butterfly is *slightly* open (5 deg or so) at idle and is resting on the idle screw as the stop.

I wouldn't bother dressing it up...

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PostPosted: Wed Jun 03, 2009 12:01 am 
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:yt: ;)


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PostPosted: Wed Jun 03, 2009 9:18 pm 
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Joined: Sat May 09, 2009 6:58 pm
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What's the hole next to the butterfly I've read of a couple of butterfly shafts breaking on the bad weather forum ?


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PostPosted: Fri Jun 05, 2009 10:36 am 
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Current ride: XB12Scg
Location: Herts/Middx
I think it is only an Air Hole but I'm sure the techs here might confirm :askmaz:

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