April 18, 20179 yr Anyone able to advise of standard air screw setting (No. of turns out) and throttle stop screw setting (No. of turns out), for my '98 315R? Committed the schoolboy error of starting to make adjustments to each, without first determining original settings... DOH! Now things are all of the shop! Thanks in advance.
April 18, 20179 yr On the ltr model 315r Air Screw 1 turn out,from from fully in as a starting position ,and adjust as it warms up.In to richen out to weaken
April 18, 20179 yr Is it the PHBH carb? If the mixture screw is on the cylinder side of the carb it should be "in" to lean and "out" to richen. I think we used to run them at about 2.25 turns out, but that was on the PHBL carb. When the screw is on the air box side, then it's as bilks described. It's been around 13 years since I messed around with those carburettor thingys, so I could be wrong. Edited April 18, 20179 yr by jrsunt
April 20, 20179 yr On my '97 phbh the air screw is just under two turns out and the throttle stop is 4.25 turns out. I started by setting the throttle screw so it just barely contacted the slide and had the air screw at one turn out. Edited April 20, 20179 yr by 1962siia
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