scottie_b205 Posted August 26, 2012 Report Share Posted August 26, 2012 I have a 1999 Montesa 315R. I would like to know what good starting point for jetting at sea level is. I can't find anything info on stock jetting in the monty manual or in the forums. I can find specs for Gas Gas 270s with the same Dellorto PHBH 26MM carb on the GG usa website.. I have a 135 main X19 needle 2nd clip from the top 38 slow jet #2 air screw 2,5 turns out. My plug looks wet and i'm thinking the main should be smaller after seeing the Gas Gas spec in the 18 to 120 range. Quote Link to comment Share on other sites More sharing options...
naichuff Posted August 26, 2012 Report Share Posted August 26, 2012 Carb Id NoPHBH26CS Main jet (standard) 135 Slow jet (standard) B46( upper) 46 (lower) Jet needle clip 3rd from top Float level 18.5mm Air screw intial opening 1 turn out from Montesa manuel 97.>99 315 Quote Link to comment Share on other sites More sharing options...
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