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rs 38mm set up

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Guest
just got some rs 38mm carbs to replace the 38mm slingshot carbs on my 1229 efe gas flowed & skimmed head ,mild cams,75mm bell
mouths with foam over socks, 4-2-1 ex with straight through end can. the rs have 145 mains in is this a good starting point don't want to risk running lean cheers
 
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final set up

final set up

after a bit of fiddling,plug chops use of colour tune and vac gauges,this is what i ended up with.
pilots: 27.5
mixture screw: 1/2 turn out
needle: middle notch
main jet:140
the bigger pilots got rid of a stumble/misfire just off tickover plugs a nice mid brown colour,there was no difference in vac readings with tops off ,just got to set the pump
 
Not a expert but thought 1 and 1/2 turns out was normal. maybe smaller pilots and screwed out one and 1/2 turn. and a good run on mains be ideal to check what size main jets as mite be interfering with the 1/4-1/2 throttle mixtures. Ignore if u want, could be wrong
 
mixture screw

mixture screw

mikuni manual say mixture screws should be between 1/4 and 3/4. out everything else seems pull clean all the way through
 
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screws

screws

most other carbs are 1 1/2 to 2 1/2 out seems to be a mikuni rs thing :D
 
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