Hey guys i just did a few things to my sled and i was wondering what you would recommend as a starting place for jetting. Sled is a 1997 Yamaha SX and did the head gasket mod., air box mod., silencer bore, geared to 22/40, and a 51/43 helix. Thanks
Dmace
New member
You could start with stock jetting and adjust the fuel screw and jet clip from there, you'll surely need to richen it up a bit. Maybe a one size larger pilot jet with the intake mods.
Stock settings are:
Main Jet - 135 (carbs 2 & 3) 137.5 (carb 1 clutch side)
Pilot Jet - 42.5
Clip Position - 3
Fuel Screw - 1-1/2 turns out
Stock settings are:
Main Jet - 135 (carbs 2 & 3) 137.5 (carb 1 clutch side)
Pilot Jet - 42.5
Clip Position - 3
Fuel Screw - 1-1/2 turns out
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i would'nt do the air box mod ...sled is very finicky with that mod...very hard to jet to!
Dmace said:
I believe the stock settings you mentioned are incorrect........mains are 145 and 143.8's...pilots are 45
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Thanks for the PDF Dmace, and yammy you are correct. I went and tore my carbs apart today and the main jets are 145. Thanks for the info on the air box yammy cause she was an hour away from getting cut. If I don't do the air box mod I shouldn't have to rejet should i?
For the most part you have the same setup as I do . I run my fuel screws at 1 3/4 turns and stock jets
grapeape
New member
What ever you do, dont do the airbox mod unless your at elevation.
no need to rejet unless you pipe it!
Dmace
New member
Correct, I posted the numbers for the 600cc engine. Sorry about that.yammy said:
The 700's are 145 (1) 143.8 (2,3), 45 pilot and clip position 3.
extremelyfastmax4
New member
what works best on the red head 700 holtzman temp compensator jet for -30 on ur main jet run 50 piolt on tripple pipes leave the air boxes on i get 17 miles to the canidian gallon never have to jet again this is a awsome set up no worrys for lean conditions .