stuttering fzs 600

[red98]

i`ll have to keep you in suspenders for a little while longer,working this weekend but might get a little fazer time 

[red98]

bit of progress with "the stuttering one" new shims in place , cams in,timing marks aligned and tensioner fitted,next job, check the clearences 

[red98]

weekend off    so lots of "fazer time"....checked clearences as new shims fitted,all within tollerences,rocker cover fitted,carbs fitted with throttle and choke cables connected,while carbs were off checked operation of choke plungers,no problems there,coil,fuel filter and pump refitted,tank and seat on.new pick up coil fitted,put battery on charge as a little low..........nice to have the time to spend on the old girl   

[CRH]

weekend off    so lots of "fazer time"....checked clearences as new shims fitted,all within tollerences,rocker cover fitted,carbs fitted with throttle and choke cables connected,while carbs were off checked operation of choke plungers,no problems there,coil,fuel filter and pump refitted,tank and seat on.new pick up coil fitted,put battery on charge as a little low..........nice to have the time to spend on the old girl   

...........hi paul, fingers crossed for ya bud!!...only thing you havnt mentioned is ...tyre pressures  :rolleyes ..think you have covered every other possibility .......................then........ROADTEST TIME???????????????

[red98]

no tax at moment so put the bike on the trailer and went down to local industrial estate,private road,and gave it a test ride,bike starts fine and revs freely all through the rev range,great.....pulls away no problems ,get to about 3000/4000 and its bogging down..almost as if running one 2/3 cylinders....the only thing i`ve changed since last time is the pick-up coil as broken/worn wire.and also ive set the mixture screws to 2.5 turns out,standard settings,when i first looked at the carbs they were set to something like 5 turns out and i had run it like this for the last 10 years,no problems....not sure of the effect in changing the settings ,anyone know more than me ?....it is getting better though,on the centre stand with no load on it its fine................ thinking of by-passing the fuel pump and filter next and maybe putting the mixture screws back to 5 turns....but i dont know why  :o

[CRH]

...fkn sod int it?...ile get you that fuel pump relay sorted if you want?..mabe give that a try!..dont think its the mixture screws though paul?...it was boggin with them set to 5 before you adjusted to factory!!...could be wrong but seems excessive dont you think?..usualy when they are set in factory that is normaly a starting point,ie 2.5turns out,then mabe a small tweak either way of that setting point to get things  into spec!...but 5 turns seems alot ?....but if it is i am wrong and it does need 5turns thats one rich mother fucker runnin engine you got there!!! pm me you address again and ile pop that relay in post for you! ..give it a try ?..you never know :rolleyes ....

[His Dudeness]

This bike is turning into a nightmare. Might be time to give it to a mechanic. Fresh eyes and all that

[red98]

...fkn sod int it?...ile get you that fuel pump relay sorted if you want?..mabe give that a try!..dont think its the mixture screws though paul?...it was boggin with them set to 5 before you adjusted to factory!!...could be wrong but seems excessive dont you think?..usualy when they are set in factory that is normaly a starting point,ie 2.5turns out,then mabe a small tweak either way of that setting point to get things  into spec!...but 5 turns seems alot ?....but if it is i am wrong and it does need 5turns thats one rich mother fucker runnin engine you got there!!! pm me you address again and ile pop that relay in post for you! ..give it a try ?..you never know :rolleyes ....

yes , 5 turns is a lot,was on that for 40000 miles no problems...just dos`nt make sense,it is getting better though so i must be doing something right.....i`ll let you know on that relay matey,thanks for the offer.

[red98]

This bike is turning into a nightmare. Might be time to give it to a mechanic. Fresh eyes and all that

been thinking the same dude....have a friend who has his own workshop,top man,did ask him in the early days , he said pick-up coil,he was the bloke who checked the carbs for me,i asked him to sonic clean them but he gave me them back saying "no point"........might go up and see him 


bet its something simple  :rolleyes

[Fazerider]

That's disappointing... only partly cured.  
At least the fact that it revs OK with no load implies the sparks are good now. The remaining problem certainly sounds like air or fuel in short supply.
I too find your slow jet settings a bit of a puzzle, all three sets of carbs I've had have run fine on with the adjuster set to slightly less than 2 turns. I'm currently overhauling the set I pulled out a few weeks back. When I've got them fettled you're welcome to borrow them for diagnostic purposes.

[red98]

That's disappointing... only partly cured.  
At least the fact that it revs OK with no load implies the sparks are good now. The remaining problem certainly sounds like air or fuel in short supply.
I too find your slow jet settings a bit of a puzzle, all three sets of carbs I've had have run fine on with the adjuster set to slightly less than 2 turns. I'm currently overhauling the set I pulled out a few weeks back. When I've got them fettled you're welcome to borrow them for diagnostic purposes.

your a top man FAZERIDER....bought my own spare set last year but turned out to be bad,CRH helped me out with another set which made no difference too stutter,had my origanal set look at by local mechanic friend and found no problems..
iam with you on "air or fuel in short supply" and as i have improved things with the recent changes iam going to bypass the pump and filter ,ive fitted a new k&n filter but will take it out to see what difference it makes..
          before i do anything iam going to read through this whole thread and take notes as i go......iam sure the answers in there somewhere 

[Fazerider]

Sounds as though you may have enough carb sets to be going on with for the moment then. The jets on mine will be OK once I've cleaned the silt and corrosion out, but the sliders are worn so throttle response will never be brilliant... they're just an emergency spare set.

... iam going to read through this whole thread and take notes as i go...

You'll have a chuckle at page 4 (I think it was).
Some plonker told you the pickup coil would have nothing to do with the stutter.
Ahem. :o

[red98]

Sounds as though you may have enough carb sets to be going on with for the moment then. The jets on mine will be OK once I've cleaned the silt and corrosion out, but the sliders are worn so throttle response will never be brilliant... they're just an emergency spare set.[quote author=red98 link=topic=2066.msg83420#msg83420 date=1372016340]
... iam going to read through this whole thread and take notes as i go...

You'll have a chuckle at page 4 (I think it was).
Some plonker told you the pickup coil would have nothing to do with the stutter.
Ahem. :o
[/quote]




ah yes  :lol ....stutter at 8000 back then.i must be close or was it just getting worse  :rolleyes ......noticed i was fitting the bathroom back then....still not finished  :o

[red98]

been having a play over the last couple of days,on the verge of putting the bike into my mates garage for him to sort out but thought i would just check the things i have done including the mixture screws,i can just about adjust all four with carbs on the bike but slipped the carbs off just to make sure....best settings are 2.25 and ive taken the new k+n out and refitted the old hiflo filter and there is an improvement......worse with air filter out...going to check carb balance next to see what that tells me........back of my mine iam thinking ....rolling road,dyno 

[darrsi]

This is where i get my bike Dyno'd, the fella Nick in there is more like a bike surgeon, he's very good.


http://pdq1.com/services/

[red98]

This is where i get my bike Dyno'd, the fella Nick in there is more like a bike surgeon, he's very good.


http://pdq1.com/services/

thanks darrsi.....i remembered you saying you used them and not far from me  ...might go over and have a chat 

[darrsi]

Either pop down and have a chat or even phone them, they're extremely helpful over the phone as well.

[nick crisp]

Have you started to read through all this again yet Red98? What chapter are you up to? Personally, I found the plot to be a bit thin, but the characters are almost believable...oh, and someone's nicked the last page - bastards!  :lol

[darrsi]

Have you started to read through all this again yet Red98? What chapter are you up to? Personally, I found the plot to be a bit thin, but the characters are almost believable...oh, and someone's nicked the last page - bastards!  :lol

He's leaving himself open for a sequel...... 

[Andy FZS]

Do you think the sequel will be titled stutttttttering fzs1000 in silver or is that to obvious...