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Old 29-04-2017, 06:33 PM
johno74 johno74 is offline
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Default gsxr carb balancing

If there are any carb balancing gurus i'd appreciate some help please..
95 water cooled gsxr1100 on mikuni BST40 carbs.
Trying to balance them using mercury gauges to try and clear rough running but carb 4 or furthest carb to right as you sit on bike is far off the scale ie past max when the others are equalish around half way(i know that actual figures dont matter so much) but i cant adjust carb one down at all-so much that i undid the balance screw off its thread-fuck...
No idea how far off max carb one is so little point(as far as i can see) in adjusting all to max.
Im sure that they are connected properly-at least as per instructions
Anyone recognise whats happening?
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Old 30-04-2017, 08:24 AM
Tricky-Dicky Tricky-Dicky is offline
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Join Date: Dec 2016
Location: Norfolk
Posts: 285

I'm no expert, but providing your gauges are accurate ,have you swapped them around to make sure the gauge is not faulty?

i would also run a compression test, things like a burnt valve, tight valve shims etc can cause high vacuum.
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Old 02-05-2017, 07:53 AM
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harry harry is offline
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Location: Taunton
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I would agree with Tricky Dicky, check every thing else before you start fiddling with carbs.

Its quite rare for undisturbed carbs to go out of balance.

I'd start by swapping the spark plugs around to see if the fault moves with the plug.
si is does non opportunus vos postulo a maior pango
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