Urgent help needed, could have found the problem

**Ixion** · 9th April 2007, 18:32

Uh, the choke's not stuck is it? Sure ?

**Motig** · 9th April 2007, 19:30

Did you do the obvious and go for a ride without the airfilter then check the plugs again ? Would show if its a blocked filter then.

**kneescraper** · 9th April 2007, 20:01

I didnt go for a ride, I did rev it and let it run for a couple of mins. I was running out of sunlight fast...also had to cook dinner

.

I will replace the air filter tomorrow...that is a small cost so it doesnt worry me. No the choke is not stuck on, I checked that.

Cans? I guess that means exhaust...the exhaust is very black..blows desent amount of black smoke when I rev it above 6,000rpm....it redlines at 13,000rpm so im not over reving it.

**JimBob** · 10th April 2007, 07:59

""when NM was refitting the carbs or when they were rebuilt""

Try a new aircleaner element and if that doesnt sort it I would find out what "rebuilt" means. If someone has been monkeying around with the carbs get them back to the standard setup and take it from there.
cheers

**kneescraper** · 10th April 2007, 18:52

Well I fitted a brand new air filter today, I ran it for a 5 min ride with out the air filter so it cleaned the spark plugs up (as one KB'er told me too) and re-checked sparkplugs, they were still dirty. As it was getting very dark I called it a night, took it for a ride..it pulls stronge and sounds normal..same as before. I am yet to see if the fuel usage changes, however if the plugs are anything to go by it hasnt changed.

James

**merv** · 10th April 2007, 19:01

The fuel usage will tell you how rich it is running, but one thing to remember these days is don't be too fooled by the plugs. In the old days they would burn what we thought was clean - all nice and white looking - but that was with leaded fuel and it was actually the lead deposits we were seeing. Nowadays with unleaded they always look a bit black as does the exhaust outlet. In the old leaded days the exhausts after a long run would look clean and white at the outlet too, but not now they are black.

If its still too rich with a decent aircleaner it can only be the carbs. I was hoping NM could give you the lowdown - but does if have the correct jets, are the needles set in the right position, are the float needle valves set right? There aint much else you can check if it is running well and it aint an ignition issue. Any other problem it would be running like a bag of arseholes - misifiring, spluttering, all that kind of stuff.

**kneescraper** · 10th April 2007, 19:06

Yeah, I am to ring Wellington Motorcycles tomorrow and ask Chris? what was done and if all was done right...not that he would admit it if it wasnt...we are humans after all.

**nudemetalz** · 11th April 2007, 20:54

Ummm,...he did redo the carbs. He showed me exactly what he did and pointed out all of the o-rings that were replaced.
He's a bloody good mechanic, I wouldn't accuse him of not doing his job ay.

I wonder if the choke valves are stuck inside.
When I put the carbs back on and was sure that the choke cable went on and functioned as normal, but just wonder if they're not settling down correctly, ie a little bit on still when the choke lever is off.
Try taking off the choke cable completely from the carbs and see how that goes.

**JimBob** · 12th April 2007, 09:02

After firing the bike up, did the idle speed and mixture set up easily?
ie the idle fuel adjustment isnt way different from stock adjustment?
Why did they need rebuilding?
Was this problem there before the carb rebuild?
What does "rebuilt" mean?
To sort these carbs out strip them down, note all settings, clean and reassemble to stock specs. ie needles, positions, jets, float levels, the lot.
If a choke is on once you are over 1/4 to 1/2 throttle it has little effect. (I am presuming these carbs have enrichners rather than chokes)
good luck