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Post by headcoats on Apr 20, 2020 18:57:03 GMT 1
Sigh.......
This thread is warts and all isn't it !
Well just been doing heat cycles and one 6 mile round trip to MOT station , but last few times I have started it , there is a noise from the clutch, well that's what I think it is
Now I have fitted a new basket, all new genuine clutch plates (both sets) , new idler gear etc , but when bike is running there is noise from either the clutch side or rear of cases as in gears
But if I pull the clutch in the noise goes
It had all genuine new gearbox bearing too , so to say a little peeved off
I will have to at least pull the clutch cover off and maybe clutch basket etc but I'm stumped at this
Frustrating too as I can't go for a ride to "bed" anything in and see if it settles , but have done about a dozen heat cycle on the drive now
Noise is just at idle , unless I pull the clutch in and if I move up the drive slowly , there is no whine or anything
STUMPED !!!
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Post by Tobyjugs on Apr 20, 2020 23:04:17 GMT 1
I have the same on my bike. I have another with engine with all kick start related parts removed and this one is ok.
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Post by JonW on Apr 21, 2020 3:59:12 GMT 1
what sort of noise is it? rattle, shriek, grumble?
Rattle would be idler or plates, shriek is something touching that shouldnt be, grumble is probably a bearing.
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Post by headcoats on Apr 21, 2020 7:17:55 GMT 1
Like a louder than normal gear noise
Not a rumble rattle
Maybe a bit of a shriek !
Idler was new out the bag as I know they wear the bush and then hit the back of the clutch
In fact every second hand one of these I have bought has been fecked
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Post by dusty350 on Apr 21, 2020 7:29:21 GMT 1
Can you get a video, to give us an idea of the noise ? You can upload vids to Flikr in the same way as a pic. Did you fit the thin shim behind the idler ? Dusty  |
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Post by headcoats on Apr 21, 2020 7:35:20 GMT 1
Yes shim was fitted
I could just get my finger in the dipstick hole and idler is firm on the shaft
Seperate question but why does the noise go when you pull the clutch lever in ?
Will try and upload a video
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Post by dusty350 on Apr 21, 2020 8:04:19 GMT 1
I'd be taking another look at the clutch. The fact the noise changes with clutch actuation means I would go there first. When you pull the clutch lever in you are taking load off the clutch, so when the lever is out the load is back on all parts. The new basket - new cushion rubbers ? Did you screw the back on as Mitaka do, or did you rivet ? I presume the clutch is adjusted properly and you have new oil ? Have you got the large rubber rings fitted between the plates ? Clutches can be noisier without them, though some say they hear no difference.
Dusty
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Post by headcoats on Apr 21, 2020 9:07:11 GMT 1
It was a new old stock basket
All new genuine steels too
The clutch action is fine with no clunking into gear or any dragging
I fitted the wider plates off an FZ600 etc , so no large rubber rings fitted
It is matched backlash but the crank gear was second hand and the teeth on the basket are obviously brand new
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Post by midlifecrisisrd on Apr 21, 2020 9:38:54 GMT 1
May just be the plates chattering in the basket
With the clutch engaged the steels and fibres are stuck together and driving the gearbox input shaft. The plates can theoretically chatter back and forth on a rough idle
When you pull in the clutch lever you disengage the the input shaft but there will still be a little drag from the oil so may absorb chatter
Mine chatters like buggery at idle with no rubbers and the wider plates
Either that or the centre bolt is loose or the bearing behind the clutch is shagged
Steve
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Post by muttsnuts on Apr 21, 2020 9:45:13 GMT 1
it could be the kick starter gear clattering the idler gear due to wear on the kick starter gear/scroll, or it could be clutch chatter, but first off, what RPM is it ticking over at, if you raise the tickover speed, does the noise go away, I see this alot and raising the tickover by 100rpm can make the difference, when it does, I've put it down to the clutch not having the rubbers fitted between the plates, if raising the tickover speed solves it, I've tended to leave it alone and I've not had any customers come back saying they have had a failure of any sort (touch wood) !
HTH
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Post by stusco on Apr 21, 2020 9:51:50 GMT 1
Wait until the wider plates stick together that will put you over the edge
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Post by headcoats on Apr 21, 2020 10:31:59 GMT 1
Trying to upload a video but struggling at the moment As Mutts says maybe something to do with the kickstart mechanism but I did shine a light in last night and it looked OK  Will have to pull the cover I think Anyone got a spare genuine 0 ring for the coolant pipe I can buy from them please :-) |
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Post by headcoats on Apr 21, 2020 10:55:48 GMT 1
CLICK PIC FOR VIDEO |
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Post by rich on Apr 21, 2020 11:30:50 GMT 1
Standard YPVS engines had a rubber damper behind the outer plastic cover on the clutch side so Yamaha were obviously acknowledging that the clutch could be noisy even when new. You have a clear windowed cover with no damper so any noise will be transmitted straight through. I also wonder if noise from the gear cogs rattling at idle can be transmitted along the shaft and echoed by the outer cover? If you have checked absolutely everything then there's not much more you can do so I wouldn't worry about it.
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Post by muttsnuts on Apr 21, 2020 12:03:51 GMT 1
Anyone got a spare genuine 0 ring for the coolant pipe I can buy from them please :-) yes I've got brand new Yamaha ones on the shelf, PM me if you need one sending |
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Post by marrcel on Apr 21, 2020 14:48:53 GMT 1
When i changed plates, springs and left the o rubbers mine clattered too. Puling the clutch on idle changed the sound. 2000miles futher it seems like its gone. May just what Dave said. May be the cork is swollen or soften up?
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Post by Tobyjugs on Apr 21, 2020 20:17:44 GMT 1
i Would go with what Dave said about the kick start scroll.
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Post by Tobyjugs on Apr 21, 2020 20:21:05 GMT 1
CLICK PIC FOR VIDEO I don't see much oil splashing about in there. |
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Post by headcoats on Apr 21, 2020 20:31:38 GMT 1
It is over the top mark of the dipstick , it is in there !
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Post by marrcel on Apr 22, 2020 6:36:28 GMT 1
i Would go with what Dave said about the kick start scroll. The noise changes when pulling the clutch 😉 |
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Post by Tobyjugs on Apr 22, 2020 9:22:56 GMT 1
i Would go with what Dave said about the kick start scroll. The noise changes when pulling the clutch 😉 I still think kickstart mechanism as I've looked at quite a few and scratched my head over the return mechanism being a bit iffy. |
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Post by headcoats on Apr 22, 2020 10:10:54 GMT 1
It could be a combination of the two ?
So have noise from the clutch and noise from the kickstart mechanism ?
Of the kickstart mechanism, what am I actually looking for ? as in wear ? |
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Post by tsa on Apr 22, 2020 10:57:15 GMT 1
Likely to be the straight cut gears, they make more noise than std ones mate.
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Post by headcoats on Apr 22, 2020 11:01:03 GMT 1
It has standard primary gears Kenny
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Post by rich on Apr 22, 2020 12:26:09 GMT 1
Come on chaps, think about what you are saying. The clue is in the fact the noise stops when the clutch is pulled in so how can it be the kickstart? It's either going to be the gearbox itself or the clutch pack as the position of the plates changes. Also, I stand by the fact that a windowed cover will let more noise through as the standard one has a rubber damper behind.
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Post by marrcel on Apr 22, 2020 13:07:33 GMT 1
I like this thread🤗
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Post by steven on Apr 22, 2020 13:44:31 GMT 1
... whats the noise like when the engine is up to normal operating temp ? does it go away ?
Steven.
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Post by headcoats on Apr 22, 2020 14:10:34 GMT 1
Getting it pretty hot on the drive doesn't seem to make any difference
Only done a few miles on road to MOT Station and back
Is the video link working as some say they can't open it ?
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Post by stusco on Apr 22, 2020 14:36:27 GMT 1
Vid worked for me sounded like a pv engine at tick over🥺
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Post by davecroucher57v on Apr 22, 2020 14:55:59 GMT 1
clutch pushrod spinning,see if its marked up.
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