Fazer Owners Club - Unofficial
Bikes, Hints'n'Tips => FZS600 Fazer => Topic started by: alexanderfitu on 03 February 2013, 09:09:29 pm
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Hi all
I had a long ride out on the fazer today and noticed that there is a fair bit of gearbox/drivetrain shunt on my fazer, eg, throttle off, clunk, throttle on, clunk. Is this normal on the fazers or just on mine?
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Chain tightened correctly?
Not totally sure but if it's what i think you mean then it's normal in lower gears.
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I checked the chain tension recently and its spot on.
If its normal then im happy, I will have a double check of axel bolts and things are tightened.
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yeh i was going to say chain aswell.......how about too much slack in your throttle cable ;)
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Or too much slack in the pilot:P
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heh, to be fair, I was using my bluetooth headset for music on the journey, so it could be that I was being a bit sensitive :P
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As well as the throttle cable I'd check carb balance.
Having said that, mine has more drivetrain slop than I'd like. With the bike on the centrestand and in gear I can rock the drive sprocket backwards and forwards though one whole tooth's worth of movement... I wonder how that compares with yours, or with anyone who has a low mileage example.
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Aha it might be the sprocket then, I recently changed the sprocket nut for the larger one.
I will double check the free play at the sprocket side, if yours is moving that much then thats where my slop is coming from.
Ill have a look tonight.
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Aha it might be the sprocket then, I recently changed the sprocket nut for the larger one.
I will double check the free play at the sprocket side, if yours is moving that much then thats where my slop is coming from.
Ill have a look tonight.
I think Fazerider is referring to the free play inside the gearbox rather than the fit of the sprocket itself, so nothing to do with the sprocket nut. (Unless it's come off!). A certain amount of free play, measured at the sprocket as mentioned, is normal. It is due to normal clearances in the gear drive train but mainly in the gear drive dogs in the mating slots.
Reducing the clunk is a lot to do with general feel for the throttle responce and a slack cable etc. will make that more difficult. (Not to mention tapping out the music in your ears ;) ).
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Ah right I see.
Yeah Im not that bothered if its normal :)
It was a long boring journey round the m25, its either silnence with ear plugs or music with ear plugs :)
I have started shifting at different points, and using different clutch amounts fo reduce it, I wonder if its one of those things that I will get used to.
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I have managed to put together a quick video.
I am moving the back wheel with the center stand on. The noise is still there with the engine running and bike in gear + clutch in, have a listen:
http://youtu.be/3TsgwTx0NgU (http://youtu.be/3TsgwTx0NgU)
If its normal, then im happy :)
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No, that ain't normal, but i haven't got an answer for you either ???
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:( Sad days, I wonder what it is.
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can you be a bit more specific in where the noise is coming from? like rear wheel area, engine area etc.
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Comes from the gearbox sprocket area. Defo not the rear wheel, and there is no movement in the rear sprocket.
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not sure what it is then. doesn't sound good though. was it happening before you changed your front sprocket? maybe take the chain off and check whether it's the sprocket causing the excessive free play or if it's something in the gearbox. probably best if you don't ride it until you know what the problem is.
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It wasnt making the noise before, but it didnt start straight after either.
I will check the sprocket nut againt before I shoot home.
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Just got home, pulled the front sprocket cover off.
The slack is inside the gearbox, It moves nearly a tooth in either direction in gear. Sprocket bolt is done up nice and tight and hasnt moved in relation to the washer.
I have tensioned up the chain a little bit more, just to eliminiate some of the slack there.
Will see what its like tomorrow on the way to work.
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That seems to be about the same amount of slop as my 70,000 mile gearbox has, perhaps a bit less. As Limax says, there's bound to be some since the cogs have to have freedom to slide on the shafts and need clearance to allow for thermal expansion etc.
It would be interesting if someone with a nice crisp low mileage example could try the same measurement.
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Well that's fair enough, it's a shame as mine only has 17,000 on it! It's the most annoying during low speed riding.
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To hopefully put your mind at rest you could see what a few other bikes feel like when on a centre stand and rocking the back wheel. (Best to ask permission first or you might get attacked :o ).
I know you said it didn't do it before the sprocket change, which is a bit worrying, but it is easy to kid yourself when you become super sensitive to a possible problem.
Good luck.
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Just for the record, i've just been outside and given the bike a bit of TLC on my week off, and gave the rear wheel a good rocking back and forth and can report there was no play at all.
My bike's just touched 40,000 miles on the clock.
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Was that in gear Darrsi?
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To hopefully put your mind at rest you could see what a few other bikes feel like when on a centre stand and rocking the back wheel. (Best to ask permission first or you might get attacked :o ).
I know you said it didn't do it before the sprocket change, which is a bit worrying, but it is easy to kid yourself when you become super sensitive to a possible problem.
Good luck.
Yeah I will have a look with at my xj600 in the same situation. Its eniterely possible that its been there the whole time and im just noticing it now.
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Was that in gear Darrsi?
DOH!!!
No it wasn't :rolleyes
I'll have another go when i get a minute.........but the bike does look all nice and shiny now if that helps at all? :lol
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lol you scared me there for a second.
It does help, Last weekend I gave mine a nice wash and covering with ACF 50. I highly reccomend diluted muck off on a spray bottle! :)
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It's all a bit pointless 'cos they're still gritting the roads around my way, so as soon as it rains it'll be covered in shite again.
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True, thats where the ACF50 comes in, all the crap sits on this layer of oil, so when you go to clean it again, it nice and shiny and not corroded :)
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If the chains adjusted correctly, only two things I can think of:
Check the rear wheel doesn't move at all (as in from side to side, or front to back physically). Basically that the bearings are fine, and the spindle is done up properly with the adjusters both the same.
Check the rod the front sprocket nut bolts onto, and make sure there's no play in it at all.
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Mine was rough at tick over and slow speed until I balanced the carbs and this made things a lot smoother, have you checked yours recently? It could have been getting worse for a while but you've only just noticed it. Good luck.
Andy
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Mine isnt rough on tickover, its pretty stable, but I have never checked the carb balancing.
It could be that, but I suspect my clutch cable is pretty worn, so Im going to change that first and see if its gets any better. If not then I will get the carbtune out :)
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If the chains adjusted correctly, only two things I can think of:
Check the rear wheel doesn't move at all (as in from side to side, or front to back physically). Basically that the bearings are fine, and the spindle is done up properly with the adjusters both the same.
Check the rod the front sprocket nut bolts onto, and make sure there's no play in it at all.
No play in the rear wheel bearings or swingarm bearins, all bolts done up correctly :)
I havent checked for any lateral play in the output shaft, so will check that soon. Thanks.
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I've just been out on the bike and before i put it away i had it up on the centre stand and rocked the rear wheel back & forth, and the play in 1st and 2nd gear was 1cm.
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1cm , ok so pretty close to mine, which is probably about 2 cm.
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1cm , ok so pretty close to mine, which is probably about 2 cm.
Well, sort of, in a "not really" kind of way!
That's quite a difference as far as play is concerned, although i have no idea what the limits are supposed to be?
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hmm true
meh, duno whats up with it!
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Right, i've just been reading a different forum about this issue, and one fella checked 3 bikes for play and they were between one inch, and one and a half inches.
So, on that evidence alone i would pretend that we never had this conversation, and everything is present and correct, because both our bikes have less than an inch of play which sounds good enough to me.
He was checking a Blackbird and 2 x FZR1000's i think?
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I think that its normal as well and we are all really paranoid.
I just went out on my XJ600 (1991) as the fazer is missing its broken bits from the fall, and there was no drivetrain shunt on the xj, although the clutch does drag badly on that.
I would say its a characteristic on the bike, and that balancing the carbs would help tremendously, as would checking all the engine mount bolts etc.
All those are things I havent done yet :)
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I had my carbs balanced a few months back, it makes a huge difference at low speed, my bike was very jittery before having them done, although i was told one carb was quite a way out for some reason?
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That will be next step then. Have to save up for a vacuum gauge! :(
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