stuttering fzs 600

[nick crisp]

Hurry up and fix it Paul, when you're done you can start on mine!  :lol

[red98]

think i`ll add.....regulator,fuel pump relay and started relay to that list ,cant think of anything else  :rolleyes

[red98]

morning stuttering fans......if theres any of you left  :o .....i think i may have fixed it  :rolleyes ........been swapping a few things from my spares bike,a lot of items which i have already checked/changed but also one new item which i have not touched yet,i have mentioned it in one of my more recent posts,with no replys from more knowledgeable foccers.....so thought we would have a little guessing game.............happy to supply beer tokens to the correct guess and more importantly an explaination in how this item works.......my monies on FAZERIDER being the winner...................oh..buy the way FAZERIDER....the generator and cover you kindly donated to the "stuttering one",ive used the internals on my bike and passed the cover onto DEADEYE,so a big thanks from both of us 

[Dead Eye]

It's like the end of an era, I almost don't want this thread to end... glad to hear you appear to have it fixed though! Looking forward to a detailed analysis

[ChristoT]

It's like the end of an era, I almost don't want this thread to end... glad to hear you appear to have it fixed though! Looking forward to a detailed analysis

There's a trailer thread to send skywards... 

Ditto on the analysis though!

[darrsi]

Just a general observation for anybody chasing a misfire or stutter. During my investigation I cleaned my carbs, replaced my plugs, replaced fuel filter, cut back my ignition leads did a carb balance none of which did anything. My symptoms only came to light after riding the bike hard for a few miles and then she would misfire on hard throttle at low revs. I would recommend anybody who has a misfire symptom to replace the plug caps. You can get 4 NGK replacements for less than a tenner.
Another possible red herring symptom is a rough idle. I have a K+N filter and a Beowolf end can with baffle in. Even after doing all of the above my bike still doesn't idle smoothly but rides great so I'm not worrying about it.

How can you have "hard throttle at low revs"  :look

[johnboy512]

i am gonna say a Improperly adjusted fuel level!!!!! maybe

[Soapy]

[quote author=Soapy link=topic=2066.msg86461#msg86461 date=1373279565]
Just a general observation for anybody chasing a misfire or stutter. During my investigation I cleaned my carbs, replaced my plugs, replaced fuel filter, cut back my ignition leads did a carb balance none of which did anything. My symptoms only came to light after riding the bike hard for a few miles and then she would misfire on hard throttle at low revs. I would recommend anybody who has a misfire symptom to replace the plug caps. You can get 4 NGK replacements for less than a tenner.
Another possible red herring symptom is a rough idle. I have a K+N filter and a Beowolf end can with baffle in. Even after doing all of the above my bike still doesn't idle smoothly but rides great so I'm not worrying about it.

How can you have "hard throttle at low revs"  :look
[/quote]
Maybe I didn't explain it right. After riding hard for a few miles, if I had to slow down then open up the throttle (low revs, high gear) at anything more than about 1/2 an inch then the bike would stutter/misfire. If I eased the throttle extremely gently then I could get the engine to pick normally. You can pull the throttle around hard at any revs. The gear your in will decide how fast the engine picks up.

[red98]

i am gonna say a Improperly adjusted fuel level!!!!! maybe

mmmmmmmmm...good guess JOHNBOY....you are thinking the same way as i WAS  [size=78%]...........iam not 100% sure ive fixed the problem as iam limited on test ride length due to lack of tax,but on the short test ride i had after swapping parts there was a massive improvement....going to tax it at the end of the month and see for sure......will sneak out later when my private test track is quiet ......any more gusses ?[/size]

[johnboy512]

Couldnt be the pick up coil!!!!!

[red98]

Couldnt be the pick up coil!!!!!

i think that was part to blame and did replace it with one kindly donated by FAZERIDER,the wiring where it passes through the cover was very worn....the new one did improve things......and thats a MASSIVE clue.....

[johnboy512]

So i'm getting a tad warm mmmmm pick up coil, wiring rubbing through casing,  :eek  igh resistance on the pickup side to to the ignitor unit (white/red) wire maybe!!!! still i was with you on the fuel side with the level of the float chambers in the carb.....

[red98]

yep....very close      and with no one else playing looks like the beer tokens are coming your way..........unless FAZERIDER is going to join in 

[Dead Eye]

Sounding very electrical to me... unfortunately I know next to nothing about the electronics so can't really make any well thought out guesses...

Spark not strong enough?

[samlj96]

Red98, please put us out of our misery, I too got a stuttering Fazer, with the same symptoms as yours, and done more or less everything you have done and still she stutters! I am desperate now to have my bike back! :o

[red98]

ok....a bit more help.my first thoughts were fuel and i have more or less stuck with this all along.....iam like DEADEYE  with modern bike electrics,dont know a great deal about them but am starting to understand them  ...i have already mentioned that replacing the pick-up coil has helped and is a big clue.....JOHNBOY is on the right lines and DEADEYE is on to something also.....even if you know very little about electrics you should guess the problem......quite a few stuttering problems on here at moment and mine is a cheap fix  so i hope i can help others....so.......you have untill the end of the day to win the beer tokens before i reveal the answer and enjoy the ice cold beer 


far too many clues there.....think i may have made it too easy for you  :rolleyes 

[johnboy512]

yep....very close      and with no one else playing looks like the beer tokens are coming your way..........unless FAZERIDER is going to join in 

mmm so the pickup coil resistance high [size=78%] it should between  189--231 ohms so is it the black/blue wire a bit chaffed!!!!!![/size]

[johnboy512]

So under load, high resistance = breakdown from the pick up coil, causing stuttering....

[CRH]

hi paul,....cheap fix you say?...has ime useless with electrics also will have a stab at either rectifier/regulator/battery,..or bad earthing wire? from/to pickup coil...? :rolleyes

[red98]

hi paul,....cheap fix you say?...has ime useless with electrics also will have a stab at either rectifier/regulator/battery,..or bad earthing wire? from/to pickup coil...? :rolleyes

hi clive.....good to hear from you again  ........mmmmmmm without giving too much away.....your in the same boat as JOHNBOY + DEADEYE.......try one answer at a time..........now this is getting really easy.

not heard from ADE THE BLADE for a while  :rolleyes