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Air fuel mixture screws

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Air fuel mixture screws Empty Air fuel mixture screws

Post  gus Mon 13 Nov 2017, 4:43 pm

The manual says 1.75  -+  turns out . At that a my 1200 spits flames out the exhaust . Entertaining  , but that's about all going for it . Laughing
I normally go for 3  turns out but cannot remember why .
I went back to 3 turns and its fine , if anything still a little rich .(buy the plug colour ) 
Why does the manual  give me its setting 
While i'm at it 
Gen 1 carb balance , very easy .
Gen 2  carb balance ,TERRIBLE , no space . Someone should invent a curved pair of long nose pliers .Pig of a set up .
gus
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Join date : 2010-11-23
Age : 73
Location : Cygnet ,Tasmania

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Post  paul Mon 13 Nov 2017, 5:19 pm

I bought a pair of curved pointy nose pliers , for just this purpose .............supercheap I think . I also found with an aftermarket muffler , 3 turns was about right  as well , on my and my sons 1200.

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paul
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Join date : 2011-08-19
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Location : Morphett Vale Sth. Aust.

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Post  mtbeerwah Mon 13 Nov 2017, 8:46 pm

Bingo on the 3 turns at being close ...
I do know my gen1's carbs are extremely sensitive.
Mine at 3 turns is too rich, stumbles on take off, and stalls, or slip the clutch. 
To fix mine, and get it perfect, I kid you not, I only have to turn the needles in ,a 32nd of a turn on the screws.
I've got a stubby flat blade screw driver, that I've marked,  16th of a turn markings, and it's half of a 16th=32nd, to stop the stumble, and give it perfect fuelling. If I turn it in a 16th too far,  it starves for fuel,  and bogs down.
It is sooooo god damn sensitive. Then with the changes in the seasons, I have to tweek them again.
Don't get me wrong,  I love it's quirky nature, and now I know the bike,  it's an easy fix,  and I always take the flatblade with me,  on every ride, to fine tune if need be. 
I basically make it as rich as possible on the pilot circuit, just so there's no adverse reactions. 
My gen2 never goes out, although it's got a jet kit in it, with a richer tune in general 
Speaking of carb ballaning, mine never go out, even after 30 000km intervals.

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"Like an unmuddied lake, as clear as an azure sky of deepest summer"
96 Gen 1. Gone but not forgotten (5yrs RIP)
97 Gen 1. Restoring  (2yrs)
99 Gen 1. Impressed with.  (New)
03 Gen 2. Love hate relationship.  (15yrs)
07 DRZ 400e. Lot of fun with no power. 25 km/L  (4yrs)
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Join date : 2010-02-20
Location : Brisbane

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