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+--- Forum: FZS600 Fazer (https://foc-u.co.uk/mybb/forumdisplay.php?fid=78)
+--- Thread: stuttering fzs 600 (/showthread.php?tid=57718)
Re: stuttering fzs 600 - red98 - 30-09-12
morning all.........swaped the carbs this morning
checked diaphrams,sliders and jets,all good with standard size jets 
started the old girl up and...................no change :\ [size=78%]................stutter at 6000 rpm just like hitting a rev limited [/size] :\ :\ :\
going to check the valve clearances when the engines cooled down,probs this evening and then
....................................................................dont know :rolleyes :rolleyes :rolleyes :rolleyes :rolleyes ........might go with ADE THE BLADE idea and go up a size on the jets.....but dont understand why this would work :\ :\ ........................
its very sudden when it hits the stutter almost like throwing a switch.........so iam thinking electrics
ive swoped ecu,coils,and tps and am now thinking.............REGULATOR/RECTIFIER............your thoughts please peoples
Re: stuttering fzs 600 - Fazerider - 30-09-12
(30-09-12, 01:47 PM)red98 link Wrote: ...am now thinking.............REGULATOR/RECTIFIER............your thoughts please peoplesIt's a possibility, a voltmeter across the battery terminals should indicate whether there's a problem there. I'm sure you'd have noticed low battery if the rectifier wasn't doing it's bit, if the regulator side had failed then the voltage could rise: maybe high enough to upset the CDI unit, but usually a high supply voltage just tends to kill things like that. And you might have noticed lights getting very much brighter as the revs got higher. So, have to say it's unlikely.
Did you try the suggested plug chop after holding it at max revs for a while? That should indicate if it's a mixture problem.
Otherwise, try a timing light... that might give some clues.
Re: stuttering fzs 600 - kebab19 - 01-10-12
Disappointing.
Can u find a fellow FZS owner who can leave his bike with you for 24 hours while you swap over all electrical parts until you find the culprit? Would save you spending another small fortune replacing the wrong parts.
Beers usually do the job
Re: stuttering fzs 600 - red98 - 01-10-12
(01-10-12, 09:58 AM)kebab19 link Wrote: Disappointing.
Can u find a fellow FZS owner who can leave his bike with you for 24 hours while you swap over all electrical parts until you find the culprit? Would save you spending another small fortune replacing the wrong parts.
Beers usually do the job
that would be nice KEBAB......not spent too much upto now...ecu and carbs i can sell on
£30 on head gasket and same on air filter :\ everything else service items going to check the valve clerences next and probs re-fit the origanal carbs with larger jets,(YOU STILL WATCHING ADE THE BLADE)also re-check everything i`ve done so far
after that i might have a word with the guys at pdq in taplow
10,000 views today :eek :eek :eek ...so time for me to thank all you watchers and posters who have helped me out and at times kept me going............CHEERS FOCCERS
Re: stuttering fzs 600 - CRH - 01-10-12
red. sorry to here it didnt do the fix?....i will take off my fuel relay and post it to you if you want?...mabe yours faulty ??...not giving it the fuel it needs at higher rpm,s...
Re: stuttering fzs 600 - red98 - 01-10-12
hi crh
......yeh ahame it did`nt fix it :\ ......nice offer of the relay but i could`nt take advantage of you like that........as iam not welsh,.....boyo :rollin :rollin ...........might try ades suggestion and change jets,going to find his old post and see what he used.....relay sounds plauseable aswell .......need to tidy the garage and fit a new roof in readyness to get my classic bmw back in there before the bad weather comes so might have to put it on hold for a little while :\ .....got a weeks holiday left so might take it before the end of the month and have a good old sort out/tidy up .......thanks for you help with the carbs,thats a big favour iou .......que ade :rolleyes
Re: stuttering fzs 600 - CRH - 01-10-12
hes been very quiet hasn,t he?...ya dont think hes been abducted by a fellow queen on one of his satday nights out do you>>> :b
Re: stuttering fzs 600 - CRH - 01-10-12
ps, whats bothering me is? why you cant pull a decent vacume?....paul recons you should be able to acheave between 200-240 easily?? :rolleyes
Re: stuttering fzs 600 - ade the blade - 01-10-12
afternoon....early lunch today (mid top end stripdown ) . Red mate, jets are now 2 sizes up ( stock 115 now 120). tend to just read posts now
rather than comment, especially after that cctv farce with poor old Clive. possibly getting too cliquey for my liking ( been on other forums that have gone that way. pity really :rolleyes ) keep at it matey....rest assured, i`m watching from afar from time to time
Re: stuttering fzs 600 - red98 - 01-10-12
(01-10-12, 12:02 PM)ade the blade link Wrote: afternoon....early lunch today (mid top end stripdown ) . Red mate, jets are now 2 sizes up ( stock 115 now 120). tend to just read posts now
rather than comment, especially after that cctv farce with poor old Clive. possibly getting too cliquey for my liking ( been on other forums that have gone that way. pity really :rolleyes ) keep at it matey....rest assured, i`m watching from afar from time to time
hi ade....good to see your still with us
.....yeh getting very nasty that cctv post :eek all quite now was going to pm you regarding jet sizes
so good timing....think i`ll put origanal carbs back on with the bigger jets and see what happens....if it works..........................................i think clive might be paying you a visit .............did you keep the wifes fazer or move it on
Re: stuttering fzs 600 - red98 - 02-10-12
working in leicester today so popped into yamaha dealer while i was up there
,was going to buy 4x120 jets,2 sizes bigger .......helpful chap behind the counter asked why so i went through the whole story :\ :\ :\ :\ .....told me i was wasting my time but agreed on what i had already checked and said he would have gone down the same road asked if i had tested crank position sensor but i could`nt remember if i had or not :o :o and then he mentioned fuel pump and relay
which CRH has also just mentioned,rocker covers off at the moment so i can check the valve clearences just to make sure they are correct now that i have fitted new shims then i`ll bypass the fuel filter and pump and see what happens i advised someone on here a few weeks back to try this but it did`nt occur to me at the time to try it on mine :o :o :o
Re: stuttering fzs 600 - CRH - 03-10-12
offer still there mate if you want to try it?....not using mine at the mo so you welcome to try it?...been looking for a link between yours and ades ?.....did you say you changed your headers??, cus ade as stainless on his hasn,t he?....some aftermarket headers are a diff bore internally ?..and can make your engine run very weak causing top end fuel starvation!! :rolleyes .....and as ade said he never did find out why he had to re-jet??....whats been throwing me is the fact you only changed ,your filter and headers .....then the stutter>,,,,,worth a thought mabe?...cus if it is that you now need bigger jets and that solves the problem?,...thats the ...only....link between yours and his.....HEADERS!!!!!!!!!!!!
Re: stuttering fzs 600 - red98 - 03-10-12
hi matey.......yes been thinking about the headers
it is a big stutter :\ and i think to big for the headers alone to cause it....ive welded the origanals up and can refit to see ....thanks for the offer of the loan ,i`ll bypass both the pump and filter at the weekend and see what happens......as for the jets ,this is what the dealer in leicester was getting at....there is no reason to change them,its worked on ades but we dont know why :\ ....mines standard,as you know,with exception of stainless headers and k+n filter,which should not need a re-jet :\ ......once again thanks for your input
Re: stuttering fzs 600 - Dead Eye - 03-10-12
The stainless headers that red has came from my bike which ran fine when it had them. At the time it was running a standard air filter and standard end can as well - so practically an identical setup to red
Unfortunately I don't know what make / brand they are as they came with the bike - I'll have a rummage in the old paper work and see if the previous owner kept the receipt but I don't think so
Re: stuttering fzs 600 - red98 - 03-10-12
(03-10-12, 10:49 AM)Dead Eye link Wrote: The stainless headers that red has came from my bike which ran fine when it had them. At the time it was running a standard air filter and standard end can as well - so practically an identical setup to red
Unfortunately I don't know what make / brand they are as they came with the bike - I'll have a rummage in the old paper work and see if the previous owner kept the receipt but I don't think so
thanks for that DEADEYE
iam fairly certain its not the headers thats causing the stutter see what happens at the weekend when i by-pass the filter and pump
Re: stuttering fzs 600 - CRH - 04-10-12
think the only diff that ade had was a aftermarket end can?....dont know when he fitted his headers though,ie, before his trouble or after?...but he never did find out why he had to re-jet? did he?......see how you get on red? i now know of someone with a spare fuel relay if it is that at fault?...and will let you have it cheap!!
Re: stuttering fzs 600 - red98 - 05-10-12
(04-10-12, 08:47 PM)CRH link Wrote: think the only diff that ade had was a aftermarket end can?....dont know when he fitted his headers though,ie, before his trouble or after?...but he never did find out why he had to re-jet? did he?......see how you get on red? i now know of someone with a spare fuel relay if it is that at fault?...and will let you have it cheap!!
hi crh.........be out in the garage this weekend
...now the weathers changed iam not to keen to get out there not used the thou for a couple of weeks now :\ :\ :\ :\ .....i will however by-pass the pump and also check the valve clearences...i`ll let you know what happens......i also need to re-roof the garage before the weather gets really bad,so a big clear up this weekend .....ill let you know about the relay,cheers mate
Re: stuttering fzs 600 - red98 - 07-10-12
:o :o :o :o :o :o :o :o :o :o :o :o :o :o :o senior moment :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o
just checked the valve clearences again,not checked since i adjusted them a few weeks ago
gaps are way too small :eek so look back through my notes and i can see where i went wrong :b exhaust clearences were too small,so i replaced the shim with the next size UP :eek :eek :eek :eek :eek :eek :eek :eek :eek ....SHOULD HAVE GONE DOWN :o :o :o :o [size=78%]the phrase dumb ass springs to mind[/size] :rolleyes :rolleyes :rolleyes :rolleyes :rolleyes ....i took [size=78%] note of the shims i fitted so easy to change but i will check the clearences again this afternoon just to make sure[/size]
[size=78%]not done that before.......must be my age [/size]
Re: stuttering fzs 600 - CRH - 07-10-12
(07-10-12, 11:00 AM)red98 link Wrote: :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o senior moment :o :o :o :o :o :o :o :o :o :o :o :o :o :o :o....fkn knew it?..i was right you did get your date a birth wrong!!! :rolleyes :rolleyes ...you are fkn 60!!!!!...why you didnt let atb sort it out for you i dont know?.... :b ... he,d do owt for a pair of your other halfs stockings?
just checked the valve clearences again,not checked since i adjusted them a few weeks ago
[size=78%]the phrase dumb ass springs to mind[/size] :rolleyes :rolleyes :rolleyes :rolleyes :rolleyes ....i took [size=78%] note of the shims i fitted so easy to change but i will check the clearences again this afternoon just to make sure[/size]
[size=78%]not done that before.......must be my age [/size]
Re: stuttering fzs 600 - CRH - 09-10-12
hi, matey!...did you get it sorted then?....you dont think it was a touch of alzimers do you? :lol :lol :lol :lol