stuttering fzs 600

[red98]

just bought 4 plug caps on ebay for £8.80 + free delivery..........bargain 

[wannafazer]

:lol

[wannafazer]

By the way, chuck your old ones in the bottom of your toolbox. They won't all be fucked and will get you out of a hole one day, like mine did last Saturday.

[happy biker]

make you right the best one are the carb ones :rollin

[clayt74]

I think i got lucky with mine, it seems the only issue i had was a bit of water ingress into 1 of the caps. a good douse of WD40 and the symptoms were immediately gone, no matter how hard i pushed it to wot.
over the weekend i had the tank off to replace airfilter and whilst there cleaned and checked all leads and caps thoroughly as well as cleaning the seating area all around the plugs could see no proplems, I waited till dark and checked for any arcing or tracking as suggested, but could find nothing and the bike was still running a treat.
the only additional thing i did was to put some almagamating tape around where the HT leads enter the cap just as a precaution cos i ride all year round and believe prevention is better than cure.
hope yours is running sweet soon

[red98]

clayt74.....glad you got yours sorted...iam busy at work now so looks like it will be the weekend before i get to test ride....just noticed we have another `stutter`on here just after changing the air filter...will keep an eye on that one

[red98]

:\ :\ ....bike back together this morning and been for a test ride......i still have a stutter :'( .....looked the garage and walked away,went to see a good friend whos just set up his own  bike workshop,used to work for a yam dealer and knows his stuff,proper bike guy.......he thinks its carbs and has offered to sonic clean them for me,ill take them off in the morning and take them up to him on monday.............

[wannafazer]

Bummer !! Did you fit your new plug caps ?

[red98]

yes...caps were delivered friday,new parts so far.....inlet rubbers
                                                                      spark plugs
                                                                      spark plug caps
                                                                      air filter
                                                                      oil filter
                                                                      oil
                                                       
                                                        plus.........balance carbs
                                                                      clean and inspect carbs
                                                                      check valve clearences

all found to be ok.....bit cheesed off today as excellent biking weather was hoping to go to botw tommrow.....will take carbs off again tommrow in readyness for the sonic clean..........fingers crossed   

[red98]

ok.....carbs off again this morning.....45 mins start to finish....iam going to do it blindfold next time :rollin ....going to take them for sonic cleaning tommrow lunch as not too far from work.......i fitted the inlet rubbers with the carbs still on the bike,just loosened the air box removed the battery and pushed the carbs back,just enough room to squeeeeeeeeze them in....now that the carbs are off again its easy to get to the rubbers so i think ill remove them and check there seating ok before i refit the carbs.....will update when i have some news

[Gnasher]

Then move to the carbs looking for blocked main jet/s and emulsion tube/s and holed diaphragm/s these can be tiny and will get you the very symptoms you've got.

Its all in here remove the main jets and clean do the same with the emulsion tubes they are held in by the main jets takes mins.

[red98]

morning gnasher.....yes done all that when i cleaned the carbs last weekend,didnt realy find anything to cause the stutter but good to check,a good soaking in the `sonic tank`cant do any harm and will also clean the outside

[Gnasher]

If the emulsion tubes are blocked it's not always easy to spot the holes are tiny and you need good light and eye's best way is with a magnifying glass.  It's also possible that the fuel/air passageways within the carb body have become blocked I've had this before and it not possible to see it you just have to blow them out.

[red98]

ah yes this is what the `sonic clean man` has said,adding that commpressed air still may not clear it,this is what i used,thats why he reconmends the sonic clean with a 3hr soak....i like to do all the work on my bikes myself so i know exactly whats been done and what needs to be done,this will be the first time in 10yr ownership that its been fettled by someone else....ive known him for several years and know he will do a good job with back-up afterwards if i need it...ill let you know how i get on.............

[red98]

took the carbs up to be sonic cleaned at lunch time,got a call from pete the mechanic saying he did`nt think the carbs needed the sonic clean as they were clean already,he did however notice a small brass needle guide was missing on no 1 carb i must have dislodged it when i cleaned them out myself it sits in the bottom half of the carb acting as a guide for the needle,without it petrol is just going to flood in....pete described it as pi**ing in a bucket...good description....i could have solved the stutter by cleaning the carbs but created another by loosing the guide,the part is available from yam at £25 +vat :eek ....i`ve had a look on the garage floor but cant find it,bit like needle in a haystack ,i`ll get pete to order it in the morning might get here by friday..........

[Bracechenko]

Jeez mate, what a nightmare eh!  :eek

Just read the whole thread, hope it gets sorted :thumbup

[red98]

hi bracechenko...yes long thread,but fairly basic stuff.thought i would put all the details on in hope it would help others,ive been looking at all conponents looking for wear expecting to find some,the bikes nearly on 40,000 miles,but i cant find any,think we might have a future classic on our hands  

[Bracechenko]

hi bracechenko...yes long thread,but fairly basic stuff.thought i would put all the details on in hope it would help others,ive been looking at all conponents looking for wear expecting to find some,the bikes nearly on 40,000 miles,but i cant find any,think we might have a future classic on our hands

:lol

[Gnasher]

a small brass needle guide

That sounds like the needle jet or was it the emulsion tube? 

[thom_1991]

I'm sure the Yamaha price is daft but is it like the Dynojet kits which are about a £100 when you could achieve the same result buying jets, shims for needles etc yourself for sod all by comparison. There'll be more than one bike the uses Mikuni BSR33's surely?