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riffraffretro

1998 315R Air Screw & Throttle Stop Screw Settings

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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.

 

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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

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Posted (edited)

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 by jrsunt
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Posted (edited)

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 by 1962siia

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