On a 1986 R80RT, should BOTH the idle jet be seated lightly, (CW). I found one idle jet closed, (seated lightly) and the other one 1/2 out? This sound O.K.
Last edited by BikeMike1; 06-01-2012 at 05:55 AM.
Idle jet vs mixture
The Idle jet is inside the bowl and is screwed down all the way.I'm thinking you are talking about the mixture screw on the outside bottom of the carb. There are specs to start with like 3/4 to 1-1/4 turns out specific to the year models,but one mixture screw should not be seated lightly/almost closed and they should be some what close to eash other.Might have to get into those carbs with some new parts like "O" rings diaphrams,needle,needle jet,float needle,may be floats (a rebuild kit) and make sure none of the passages are cloged.So,adj,valves,check timing,clean air filter,build carbs, then do the carb balancing.I love these bikes.
My carbs were re-built 2 years ago 400 miles prior of a 23 month storage. This jet is indeed inside the bowl. It is the idle jet. I backed one off counting revolutions. The first one I backed off, (CCW) was approx. 1/2 from seat, (CW -closed) The other one was seated, (I refer it as closed) very lightly. I was told that the idle jets are normally seated. The bike idles fine. AROUND 900 and 1000 at warm up. I was just curious why both idle jets weren't in the same position.
Last edited by BikeMike1; 06-01-2012 at 04:16 PM.
The idle jets are supposed to be snugged into position...if one was loose, then likely it was not tightened properly during the previous rebuild. Idle jets are not normally part of any adjustment process or synching. Typically people use the Bing-manual idle jet and never look back at it, other than to ensure it is clean during an overhaul. Once things are rebuilt inside, the only external adjustments are the idle mixture, idle speed, and throttle cable tension.
Kurt -- Forum Administrator ---> Resources and Links Thread <---
'78 R100/7 & '69 R69S & '52 R25/2
mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!
Thanks Kurt, that confirms what I was told. I like to collect several opinions. Helps my research...learning process.