New carbs!!!!!!!!!but.....

[reillypadraig]

Got a set of carbs!! Very clean compared to my last set, all was taken apart, inspected and put back together, had a fuel leak in 2 bowls (seals weren't doing the job) but I used 2 of the bowls I already had from last set, so I tightened the idle mixture screws in till seated and turned out 2 full turns, set the tps, adjusted the carb synch screws until they were all fairly even(by sight) will get the proper carb tune tomorrow,

...... But went to start the bike, wudnt turn over even though it was still warm from the last run I gave it on the last carbs, so I went on using full choke but then died, so I opened the fuel mix screws 1 turn each and it ran, bit poor though, so I opened them again a half a turn and it ran ok ish but still everytime I give throttle it smothers and at that setting I have fuel spitting out of the exhaust, so I turned the mix screws back down and it cuts out,

So took them out, checked everything, passages and air compressed out everything, looks too clean to have blockages but done it all the same, so set idle screws to 2 turns from seated again and put back it, almost started and tried starting by giving throttle and half throttle and full throttle but it made it worse, only starts on choke and no throttle????

Any ideas guys?

[His Dudeness]

i'd say the balance screws are way off. try turning the idle speed screw way up and see if you can keep the bike running off that. then get the vacuum gauges on and try roughly balancing the carbs while the idle is way up. then when you've got them reasonably balanced turn the idle back down and try balancing them properly.

[red98]

........+1..........do you know the history of the new carbs ? 

[reillypadraig]

they seem in fairly good condition


http://www.facebook.com/photo.php?fbid=4...=1&theater


is 2 turns from seated the factory settings? and getting to the mix screw just above the starter is a right pain, long time to do it with a pointy nose pliers

[red98]

two turns .i think,are factory settings but a little more would not hurt,yes i have trouble reaching the mixture screws aswell  :\ :\ ....have you checked the needle height ?.....should be on the middle grove of five 

[packie]

is 2 turns from seated the factory settings? and getting to the mix screw just above the starter is a right pain, long time to do it with a pointy nose pliers


2 turns out is factory settings and people say here that the Fazer runs rich so you shouldn't have to back it off further really reilly!!.  :b

It's probably hard to check without a special tool, but the fuel level needs to be 4.5mm above the chamber level or float bowl. Download the manual from the website and you see what I mean. Check also that your fuel pump is ok and that you have no kinks in the line or breather hoses.

Seems to me you are starved of fuel or air, but I'd be looking at other areas other than the Pilot screws if they are set to 2 turns out. Even if the carbs were way out, she still should fire up and run IMO but I'd try what His Dudeness said anyway just as a process of elimination.  I only balanced my carbs a while back and they were way out but the bike still ran away and fired up every time. I just was the smoothest at tickover. Best of luck, man. You have great tolerance!! :wall

[reillypadraig]

Haha really Reilly, last time I heard that was when I was on den tv as a child and dustan said oh really? No o Reilly, got him to do the flap flaps aswel lol( that's a good long time ago) off topic abit there

Can't see if it is anything other than the screws as last carbs ran fine and I changed nothing, gonna pick up the carbtune now.

It seems that it's being starved of fuel, so I bought carb cleaner this morning and gona give it a right doing with it and the air compressor aswel to rule that out

This is gona sound childish but it one full revolution of the screwdriver? Because I seen a vid on YouTube of a guy saying one revolution but he only turned the flathead half a turn or from one face to the other, that's just confusing.
I put a spanner on top of my screwdriver,(doesn't sound dirty at all does it? Haha) and aimed it at a part of the wall and turned it until it faced that part of the wall again and called that one revolution.

[packie]

Haha really Reilly, last time I heard that was when I was on den tv as a child and dustan said oh really? No o Reilly, got him to do the flap flaps aswel lol( that's a good long time ago) off topic abit there

Can't see if it is anything other than the screws as last carbs ran fine and I changed nothing, gonna pick up the carbtune now.

It seems that it's being starved of fuel, so I bought carb cleaner this morning and gona give it a right doing with it and the air compressor aswel to rule that out

This is gona sound childish but it one full revolution of the screwdriver? Because I seen a vid on YouTube of a guy saying one revolution but he only turned the flathead half a turn or from one face to the other, that's just confusing.
I put a spanner on top of my screwdriver,(doesn't sound dirty at all does it? Haha) and aimed it at a part of the wall and turned it until it faced that part of the wall again and called that one revolution.

Never done the Fazer Pilots but I'd say they are positioned in around the same area as the Bandits. With the Bandit and doing it on the bike, I have this very small screwdriver that I use. And on the screwdriver body near the handle (not the handle itself) I put a mark with tippex. I then use that mark as a guide for a full turn. My understanding would be the same as yours in that yer man on the vid only did a half a turn instead of a full turn. A full turn to me would be imaging a point on the screw at 12 o clock and turning that point the all the way around to the 12 oc clock again in one full turn.

[Dead Eye]

+1 to turns

1 FULL turn is 360 Degrees, video you saw was wrong

[red98]

two turns is two full turns.....you cant belive everything you see on the net    theres some funny foccers out there 

[reillypadraig]

two turns is two full turns.....you cant belive everything you see on the net    theres some funny foccers out there 

Lol damn right, will know in few hours if this all works

[ade the blade]

just keep in mind mate, yes,2 turns out is the `factory setting`. but no two engines are the same. i normally treat these `settings` as a starting point and usually find a small amount of tweaking either in or out will be required. on most bikes. very small adjustments can make a HUGE difference to the running. just my mutterings. good luck

[reillypadraig]

Got it going, but it won't idle, anything under 2k rev Nd it dies, first left all as factory spec and synched the carbs, but was running rich and anytime I turned it down it died, and no matter where I leave the screws it won't start straight of the button, needs a fistful of rev to start, same with moving off even though its at 2k idle

........hmm I might just be beaten on this, my knowledge had hit a dead end :wall

[red98]

thinking time needed me thinks  ....did you check the needle height ? 

[unfazed]

Check the choke levers are seating properly.
I presume the pilots screws you are referring to are at the bottom at the inlet side of the float bowl. When you turn them fully in do not force them or you will damage the smooth surfaces. Mark the side of the carburettor with a fine marker where the slots in the jet are and turn it out 2 full turns (360 degrees per turn) to line up the slots with the marker. Do all four and then leave them alone.
Where did you get the Carbs?
There may be a  pilot fuel or air jet blocked which would explain the non tick over and difficult starting. Did you blow the jets in the direction the fuel and air flows or in reverse? Most common mistake in cleaning jets is to blow in the wrong direction and end up pushing the blockage in further and making it almost impossible to remove. The jets should always be blown in reverse once cleaned.
To balance the carbs off the bike use the smooth side (for obvious reasons) of a 4mm drill bit. Screw up the tick over screw until the drill bit just slides under the throttle butterfly and adjust the rest of the balancing screws until there are all as close as possible. That is sufficient to ensure it runs.
Out of curiosity did you do a compression check on the engine?

[reillypadraig]

Just got a compression tester today, was messing around with the carbs, cleaned the jet that's long and has 4 holes in the bottom and put them back in, ran almost perfect! Then gave the bike a quick clean and rode it again. Started backfiring like hell and wudnt tick over, I think I have a blockage somewhere. Carb cleaner just won't do it, gona pick up a an ultra sonic cleaner in aldi tomorrow, only 20 quid, but that way they will definatly be clean and clear. Too small to put entire carbs in though, it's only ment for jewlery anyway.

Yea i checked the needles and there set to middle setting (factory)

Was so close today, had it running perfect with the odd little splutter on full throttle from low rev but other than that had full power constantly.

Everytime I put the carbs back in I set it to that 2 turns out

Also I synched the carbs with a proper carbtune.

I tried to do a compression test on 1 cylinder today but don't think I done it right or the reading is off cause it only read 100psi when the Haynes manuel says 185??

[packie]

I tried to do a compression test on 1 cylinder today but don't think I done it right or the reading is off cause it only read 100psi when the Haynes manuel says 185??

Sure that your manual is right? I got these from my Haynes that I downloaded from this Website:


FZS models
Standard 213 psi (14.7 Bar)
Maximum 225 psi (15.5 Bar)
Minimum 170 psi (11.7 Bar)
Max. difference between cylinders 14.5 psi (1.0 Bar)

[reillypadraig]

Ur prob right, that does sound better lol, cudnt remember exactly when I got home to post that,

[packie]

any joy?  :car

[reillypadraig]

Think the compression tester was off, all the cylinders read the exact same pressure, bike idles perfect and runs smooth, but it has an odd splutter in it still, some very fine tuning now and I think I have it.really pissed of with the amount of times I'v taken the cabs in and out, I'm a pro at it now lol.
Have to get someone to look at it now, bloody 50quid an hour though for him to look at it, that's y I have to keep eliminating problems that there might be