Service Woe

Just got my bike back from and service (new plugs, oil, oil filter etc) and
it is running like a pig[1].

He did say he has leaned it up a bit as it was a little on the rich and to
let him know if it was ok.

Anyway the weekend is here and the mechanic isn't, so is there anything I
can do to put it right? should I stop using it till monday?

[1] runs rough at idle and stalls on breaking

D

 

You need to thicken the petrol. Best way is to drain it off and microwave it
for ten minutes.

 

Probably the idle mixture screw just needs a tweak. Depends on *how*
he leaned it out though, could need needles lifting a notch (I assume
carbs: dunno what bike you've got). It won't be main jets.

 

Sorry bout that, did lack detail didn't it.

96 Bandit 600 (pink) seems to be a mixture screw on each carb, don't know
if there is another that does them all.

D

 

Looks like they are a bugger to get to as well.

D

 

Welcome to the wonderful world of Japanese inline fours.

 

No need to complain as such, he will put it right no problems on Monday,
just wanted to go out on it tomorrow and wondered if it would do any damage
to the engine if it is too lean?

D

 

Git!

 

If it's just the idle mixture then no.

Oh, when I wrote "screw" in my previous post, I meant "screws".

 

Hang on, there is an idle mixture and another type of mixture?

Please enlighten me on this... mixture is air and fuel mix right? lean is to
much air rich is too much fuel?

Idle is the revs at tick over yes? so where does idle mixture come into
this?

Excuse my thick cuntyness on this.

D

 

Right got it ta, yes he has got the idle mixture to lean by the sound of it,
revs fluctuate by 2 to 3 hundred revs on idle and drop from 1200 to 500 (or
stall) on braking, though why braking should make a difference I don't know.

D

 

It was somewhere around Barstow, on the edge of the desert, when the

Real careless paint job.

--

Dave

GS 850 x2 / SE 6a
SbS#6 DIAABTCOD#16 APOSTLE#6 FUB#3
FUB KotL OSOS#12? UKRMMA#19 COSOC#10

 

David Thomas says...

Air screws are the ones at the bottom front of the carbs which pojnt
upwards and require a very short, small headed slot screwdriver to
adjust. The number 4 one is the worst to get to, all the others are
fairly accessible. They should each be 1 and 7/8 turns out from fully
in. Adie's bandit ran like a dog until they were all set correctly.

 

Just bought a Haynes manual, also mentions about setting each carb in turn
by adjusting each carb to the highest idle speed, then backing off idle
adjuster, then moving on to next carb... that make sense?

D

 

David Thomas says...

No it doesn't, but it may to someone else.

 

Also says this should be carried out by someone with expert knowledge.... so
that's me out.

D

 

Aaaah, so is this why the main jets are often substituted when someone fits
a race can?

D

 

Cuntybollox wrote

Probably by faffing about with it ion the first place. Unless, of
course, modern technology has come on far enough that you now need to
adjust the idle mixture setting more often than when it was first built.

 

That's what I mean I think, learn something new everyday.

I would get a lot more involved with the servicing and tuning myself, but
when I do my back is so iffy that I end up suffering for days after and not
able to ride... so sort of defeats the object really.

D

 

Think it was something to do with the old spark plugs being sooted,
indicating that it was running rich so he leaned it up slightly... that
sound right?

D