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barometric pressure : A measure of the weight of the atmosphere above a surface. It averages approximately 29.92 inches of mercury (1013 millibars) at mean sea level, which corresponds to 14.7 pounds per square inch.
 
oh i see. So If I Run My Wasp When Its A Nice Day Like The Day It Got Tuned It Shuld Be Good?
 
Not exactly because theres other factors. you may have to lean or richen a bit, but it may or may not be drastic it just depends on how much the weather changes from the last time you ran it.
 
You should tweak your tune every time you run your mill. Its just one of those things that you HAVE to do.
 
thats Cool Tweaks Arent An Issue To Me. When ppl Say Re tune I Thought They Meant Toataly Re Tune. When I Need To Rich/ Lean It I Will Mark It So If I mess up I can Go Back And Try Again...
 
which Needle(s) Do I need To Mess With. Is there Just One...Or Do I have To Mess w/ All Of Them?
 
Usually the LSN is pretty close, and the HSN is off a bit. I usually take the first tank to get it totally tuned, thats including warm up.
 
okay So Mess With the HSN. Thats What My LSH Said About My Hyper
 
I'm Getting The Hpi Ribbed Pipe And I Was Just Curious how Badly It Will Effect My Current Tune Settings...And When I Have To Re Tune It To My New Exhasut What Needle(S) Do I Mess With?
 
Tweak is the right word.

You dont need to make big changes, only small ones.
 
...and no, your needles don't move causing you to re-tune the carb. What changes is the weather and altitude conditions, requiring you then to move the needles as an adjustment. Needles are seated in a rubber o-ring seal which helps hold the setting.
 
yea it is. I really Understand it now. The HSN Is the One you Usually Have To Tune. You Barley have to Mess with the LSN. And When You HAve To Mess with the LSN The IDLe Is Either Really High (too Lean) Or Really Low (too Rich). When The Temps Are Above 260 Too Lean Below 190 too rich. Idle Just keeps it on so its really easy to mess with. And It Will Be Already Tuned So I Will Just have to do slight tweaks specially since its a wasp (Really Sensitve to needle movement). I Think I Got It Down. Do You Think I Do?
(Thanks Mondragon 4 the help)
MArk
 

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