I'm having some diagnosis issues with my FZS600 Foxeye and thought here would be the most knowledgeable place to ask!
The problem started rather suddenly as the bike felt like it was stuttering on the way home.
Once back I put it up on the centre stand and something is definitely up as the chain appears to be intermittently jumping off the top of the guide rail by about 2cm but continuing to run.
First thought was replacing the worn out drive chain and sprocket with new genuine parts (rather successfully for my first repair I'm quite proud of) but the issue still persists.
All is well while the bike is in neutral / not moving but everything starts up when the drive starts turning, so I believe it's either something to do with the clutch or the gearbox.
I have gearbox warranty, but don't want to pass it off to them if it's something I can fix myself, so any suggestions as to what might be the cause would be much obliged!
Thanks in advance,
Martin
(Video attached to demonstrate if unclear, though I have to apologise for quality / darkness)
Perfectly normal when the chain jumps, it needs a weight load.
It's the momentum of the wheel trying to overtake the chain but obviously can't so it slaps about.
More people are born because of alcohol than will ever die from it.
Really? It didn't do this beforehand and you can feel it at lower revs when moving.
I can understand why it doesn't at higher revs as then it's under more tension like you say.
I agree with darrsi about the chain but the stuttering you felt while riding the bike sounds like an engine issue. Just a wild guess without more details but could be the carbs icing up if it was damp and cold at the time, or maybe an electrical issue if it was wet. Plus what noggy said.
(21-01-14, 10:03 PM)Martin11175 link Wrote: Really? It didn't do this beforehand and you can feel it at lower revs when moving.
I can understand why it doesn't at higher revs as then it's under more tension like you say.
I promise you, mine does it too if it makes you feel any better.
As for the stuttering, is it at any particular speeds, is it on acceleration, etc?
More info needed please.
More people are born because of alcohol than will ever die from it.
(21-01-14, 10:11 PM)limax2 link Wrote: I agree with darrsi about the chain but the stuttering you felt while riding the bike sounds like an engine issue. Just a wild guess without more details but could be the carbs icing up if it was damp and cold at the time, or maybe an electrical issue if it was wet. Plus what noggy said.
Ha, carb icing, i should've been the first to think of that one, good shout. :lol
More info needed yet though.
More people are born because of alcohol than will ever die from it.
Wow, okay thanks guys for the multitude of explanations and proving my "sit it on the stand test" to be rather... faulty
Going for a quick ride out now to test the issue, will post results ASAP
(21-01-14, 10:15 PM)darrsi link Wrote: [quote author=limax2 link=topic=11413.msg122382#msg122382 date=1390338669]
I agree with darrsi about the chain but the stuttering you felt while riding the bike sounds like an engine issue. Just a wild guess without more details but could be the carbs icing up if it was damp and cold at the time, or maybe an electrical issue if it was wet. Plus what noggy said.
Ha, carb icing, i should've been the first to think of that one, good shout. :lol
More info needed yet though.
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Hold on a minute, he has a Foxeye, are they not fuel injected?
That would rule out carb icing.
More people are born because of alcohol than will ever die from it.
(21-01-14, 10:19 PM)Martin11175 link Wrote: Wow, okay thanks guys for the multitude of explanations and proving my "sit it on the stand test" to be rather... faulty
Going for a quick ride out now to test the issue, will post results ASAP
Just for future reference, it's not recommended you spray on chain lube using the "bike in gear on centre stand" method either, it's inviting an accident.
More people are born because of alcohol than will ever die from it.
Hold on a minute, he has a Foxeye, are they not fuel injected?
That would rule out carb icing.
Are you losing it Darrssi, is this a plant???....like on QI with stephen fry?
Will a buzzer go off :lol
Am i barking up the wrong tree?
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Ye you're thinking about the FZ6.
To be fair though you still know infinitely more than me about the fazer & you also didnt fall off last year so you are excused.
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Really???
I honestly was under the impression they were fuel injected for some unknown reason?
Dunno where i picked that up from then, ha ha?
I s'pose i just tend to concentrate more on the year of my bike. :lol
"....Engines equipped with [color=rgb(11, 0, 128)]fuel injection[/color] do not require carb heat as they are not as prone to icing - the gasoline is injected as a steady stream just upstream of the intake valve, so evaporation occurs as the fuel/air mixture is being drawn into the cylinder, where metal temperatures are higher...."
I meant well though. :lol
More people are born because of alcohol than will ever die from it.
Foxeye same as boxeye.....except it got foxy eyes....& a bigger tank.
Martin-stick around the site it's a good place.once youve diagnosed this or if you feel brave then go to the search bar along the top of the forum & click the search button...,type in "front sprocket nut" & search & fill your boots. 8)
Easiest way to go fast........don't buy a blue bike
HE RETURNS.
Sorry for the excitement everyone (unlike QI, no alarms, but like QI, no prizes other than a feeling of self-smugness) but it turns out that changing the drive sprockets and chain (or re-adjusting something while I was doing so, the old set was a bit past its last legs) seems to have fixed the issue.
Happy all the way during fast, slow and hard acceleration
Thanks for all the knowledge and support, now I know to actually ride the thing before making judgement calls!
Apologies again (first big bike, didn't wanna wreck it by riding on a knackered whatever it might've been),
