Does this sound like an air-leak to you?

[CMSMJ1]

if everything else is std it might be fuelling badly, RVF were 108 all round as std. if you are giving it 115 then it may be too rich.

[Neosophist]

Fixed! 3 of the 4 pilot screws were missing their rubber o-rings. I'd presumed they were stuck inside after cleaning the carbs, on my 3rd strip-down / check I clocked it. Idle is rock-steady now, mixture screw is set 2.5 turns out, may lean it out to 2.25 later ^_^

[oliherst]

Sorry to bump an old thread but this sounds remarkably like a problem I'm having (found it from a forum search).......without sounding like a complete noob would someone be so kind as to confirm the location of the pilot screws? Are these the ones that you have to turn out 2.25 turns? (I can't think of a better way to explain them). Can I check this without taking off the carbs again?

[Neosophist]

yes those are the ones...

you can check them if your very nimble with a screwdriver I believe.. it's probably easier to take the carbs off.

2.5 turns is 900 degrees..

with regards to pilot screws, a mistake i've seen a lot of people make is that they seem to turn the pilot screw only half a turn out and class that as a full turn.

Put a dot on the screw driver handle and when its' back to where it started, thats a full turn..

[oliherst]

yes those are the ones...

you can check them if your very nimble with a screwdriver I believe.. it's probably easier to take the carbs off.

2.5 turns is 900 degrees..

with regards to pilot screws, a mistake i've seen a lot of people make is that they seem to turn the pilot screw only half a turn out and class that as a full turn.

Put a dot on the screw driver handle and when its' back to where it started, thats a full turn..

I'm 100% sure I didn't make that mistake as I had to look up what was considered a full turn....however I'm not sure that there isn't an air leak and this isn't the first time someone has told me that it could be the pilot screws!

[Neosophist]

ok so your pilot screws are set right.. hmm.

Whats the bike doing / running like? Maybe start a new thread with as much info as poss?

[oliherst]

I made a video before actually, the bike got really bad, it would hunt around for a while then die, after starting it again it it would hunt for a little less then die and so on. Basically had to avoid stopping or I might not be able to get it started again. Anyway, changed the carb rubbers and sync'd them and it hasn't had that problem since, but now it has the same problems you were having. Idle is random irrelevant of where I set it to, it never goes back to the same place...sometimes 2300 rpm, sometimes 700 rpm.

So now I'm thinking I need to check my pilot screws for the rubber seals as it sounds like I have an air leak, your problem is remarkably similiar to mine.

[Neosophist]

yeah i'd say you have an air-leak, or maybe even gummed up pilot jet(s)

Before you disassemble the lot again check the carb rubbers... with it running spray WD40 around the carb rubbers, if you notice the engine change at all its sucking wd-40 in through the rubbers and theres your bad seal ^_^

[oliherst]

Ah ok, I'll give that a go tonight. That elimiates the carb rubbers. I cleaned all the jets when I had them apart before so shouldn't be them. I'll be back later with results :)