Gen 1 standard fuelling

[JayB]

Guys, before we start, I can;t afford to Ivanise the bike at the moment, I know it's highly recommended, but if anyone else hasn't done theirs yet.......    can they comment on the standard fuelling.
 
I am just wondering if the set-up is to blame or something peculiar with my bike.
 
It seems to be a little bogged down, say when you are pulling out of a junction or filtering, you slip the clutch away and have to give it more right wrist than it feels like you should, then the bike catches up and surges away from you a little....?
 
Has given me a few little worries now and again, but I've mainly had fuel injected bikes lately.
 
I think I need to get the carbs balanced, but not sure if that will cure it, it doesn't really hunt around at a set speed but it does feel a little flat sometimes.
 
Mike (Falcon) suggested doing the O rings and at the same adjusting the pilot screws slightly, can I get to them without removing carbs when I balance them?
I had a couple of ZX9Rs and they were terrible, if you were in a medium gear, rolled off and then back on, say overtaking a series of cars, there would be a delay then they would shoot off, cured by setting the pilot screws further in I think it was... is this a similar thing with the original jetting of the Fazer?
 
Until I can afford to mess, I would like to optimise it as best I can.
 

[Falcon 269]

You need a 90 deg 'driver to get at the mixture screws with the carbs in place, Jay.

What you describe sounds pretty normal for standard fuelling, albeit perhaps made a bit worse by carbs being out of synch. 

[JayB]

Ah, cheers, used a mirror and a long driver on the Kawasaki...
 
I kind of thought it might be normal.

[tomlinscote]

Hiya,
Mine is a 2004 model and is totally stock, can't say I have noticed any delay or bogging down, unless I try to pull off in any gear above 3rd (    ) but I have never ridden an Ivanised model so have no comparison to relate too. Mine just goes!!
 
P
 
 

[Exupnut]

these bikes r a bugger to warm up so if it is happening soon after u start i would NOT ride with the choke and i WOULD feed a little clutch in until she warmed up..also do check carb valve caps as these can perish and also the tube that goes from your right carb valve to the emissions unit. i recently had similar probs cos the guy who had it before left the tube for the scottoiler on and it split only a tiny amount but totally focced the fuel air mix..what a twat lol

[JayB]

Yeah, you have a point about them taking a while to warm up, especially now it's getting cold. When I think about it, it is a lot worse / more noticeable than when warm.
 
I ran her up last night as it now lives 100 foot down the garden undeer a bike barn, fired up OK but was missing a bit again. Got the torch in there and no. 3 HT cap doesn't seem to seat properly, no matter how much I fiddled around.
 
When I have time and light, I need to get the tank off and see what's going on, probably the nipple top is not tight on the plug and not letting it seat fully.
 

[Lez72]

probably the nipple top is not tight on the plug and not letting it seat fully.

Whatever you do, don't ride with a loose nipple top !

[Falcon 269]

Dodgy plugs / plug lead connections are frequently the cause of stumbles/misfires that appear to be fuel-related.  I can't recall if I suggested that you check them in the PMs we exchanged, Jay, but I would eliminate that possibility before pulling carbs and so on.

Mike

[JayB]

Yes, must get in there and have a look, I know the plugs were done, well written on the invoice, for the last service the bike went in for a couple of thousand ago, but what was actually done and why the cap isn't fitting properly is a mystery.
Just ordered a tool kit to get the spark plug spanner I need, hopefully it's a proper fit.
Thanks for the help and pms Mike.
 

[devilsyam]

well took mikes advice as been suffering a little stutter on pull off bit like bogging down
pulled the plugs boy were they shagged which ever garage serviced this bike before me diddnt
new set in and stutter gone top job now to asda to by plasters for me grazed knuckles done getting the foccers out

[tomlinscote]

Further to my post above, I will now admit that the  only time the bike has ever had a rough running time was when one of the plug caps was not sealed correctly, once I had sorted that, also changed plugs and air filter at the same time, the bike has ran like a dream; so smooth and torquey (I don't care if that's not a word, for Fazers it should be!)

[mikelockyer]

Do not go down the road of changing everything. I had a similar problem and my local yamaha mechanic (Very experienced and clever) enriched the mixture by adjusting the mixture screw(s) by a quarter of a turn. Job Done. I still regulary get 50 mpg or thereabouts. Good luck. Mike

[JayB]

I managed to find time to get the tank up so I could see what I was doing and get the no.3 cap seated properly.
 
Has made it run a lot cleaner, I have done around 1000 miles since owning the bike and I think it must have been like this since I bought the bike.
 
It is a lot more responsive and idle seems smoother too, it's weird, because it wasn;t bad enough to cause an actual misfire or stuttering but it did make a flat spot pulling away etc, as per original post.
 

[GrahamB]

I had similar symptoms with an old FZ750 I rebuilt. Tick over fine, spluttering under load until high revs reached where it seemed fine again. Cause was corrosion in the HT leads where they screw into pug caps. Connection wasn't bad enough to cause problems unless the engine was under load.
 Where plug access is a problem it always makes me wonder how many "mechanics" decide that replacing them is too much trouble & just don't bother. Solution? Change them yourself.