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Author Topic: Carburettors  (Read 2189 times)

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Offline XSIIE

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Re: Carburettors
« Reply #10 on: October 09, 2015, 10:55:44 PM »
I followed the recommendations from PGNZ on setting up the carbs.
You will find the post if you search back to about early 2014.

From memory He Did it all by eye.  Hey it worked

I then finished off with a carby sync
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Offline lumox

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Re: Carburettors
« Reply #9 on: October 09, 2015, 10:07:12 PM »
Hi Eddy,

What did you use to get the poofteenth. 
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I've been riding Yamahas since 1976. Only other bike was a Honda CB900F 1978.
last bike ridden XS1100RH 83 1995 sold the bike to fund an O/S trip. Have a XS1100E for 12 yrs and ready to restore.

Offline XSIIE

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Re: Carburettors
« Reply #8 on: September 28, 2015, 10:22:30 PM »
I had the same problem when I rebuilt the carbs on 3131.

Followed advice from Irish Kiwi and reset the butterflys to a poofteenth instead of the thickness of a paperclip.  this made all the difference.

so yes take them off and bench set them.....again.

Eddy
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"If we do what we always do then
we will never be more than we are"
Poh (Kungfoo Panda).
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80G (current project)
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Offline Jonesy :-)

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Re: Carburettors
« Reply #7 on: September 28, 2015, 09:00:12 PM »
Yes
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Offline lumox

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Re: Carburettors
« Reply #6 on: September 28, 2015, 06:31:49 PM »
Sealed off all 4 vac nozzles on the inlet boots no difference, as soon as I hit the starter button rev’s straight to 7000. Undone the manifold clamps still no diff.

Should I now pull the carbs off and try a bench synch again?
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I've been riding Yamahas since 1976. Only other bike was a Honda CB900F 1978.
last bike ridden XS1100RH 83 1995 sold the bike to fund an O/S trip. Have a XS1100E for 12 yrs and ready to restore.

Offline lumox

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Re: Carburettors
« Reply #5 on: September 22, 2015, 07:43:00 PM »
OK i'll give it a go and seal off the inlets. Will get back to you with the results :o
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I've been riding Yamahas since 1976. Only other bike was a Honda CB900F 1978.
last bike ridden XS1100RH 83 1995 sold the bike to fund an O/S trip. Have a XS1100E for 12 yrs and ready to restore.

Offline Christian Raith

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Re: Carburettors
« Reply #4 on: September 22, 2015, 09:35:04 AM »
Seal off all 4 vac nozzles on the inlet boots see if that helps
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Offline Jonesy :-)

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Re: Carburettors
« Reply #3 on: September 22, 2015, 09:00:24 AM »
Are the butterfly valve thingys open? with throttle completely closed the butterflys  should appear completely shut,(but there should be a poofteenth of a gap) a gap of a of a mm or more could be your problem. these are adjustable.
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78 E Stock
78 E Stockish with spoked wheels
80 G spoked wheels and other subtle mods
81 RH problem child. Gone & forgotten
97 TRX 850
94 Yam 350 Big Bear 4 wheeler
?? Yam TTR 125 with milk crate. (RIP the Posty)

Offline SCARFEY

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Re: Carburettors
« Reply #2 on: September 21, 2015, 10:51:51 PM »
Sounds like the idle mixture may be too lean. I also like to put Injector cleaner in the tank..Put a whole bottle in you can't over treat the system


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Offline lumox

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Carburettors
« Reply #1 on: September 21, 2015, 06:52:58 PM »
Pulled the carbs off the bike. Cleaned with carb cleaner where ever I could spray. Jets removed and cleaned. Checked that the floats moved freely. Put them back together placed back on the bike. Throttle was opened and closed nice and smooth action. Started bike and instantly starts revving at 7000. Twist throttle but the revs don't decrease, adjusted the idle screw no change, pull choke open and the revs decrease down to 5000. Didn't pull the floats apart as I'm heavy handed and don't want to break the steams that hold the pin in place.
Checked the fuel and vacuum hoses to make sure they are in the correct order.

Any advice on what to do next.
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I've been riding Yamahas since 1976. Only other bike was a Honda CB900F 1978.
last bike ridden XS1100RH 83 1995 sold the bike to fund an O/S trip. Have a XS1100E for 12 yrs and ready to restore.
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