Clutch slipping? - Printable Version

Clutch slipping? - Printable Version

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Clutch slipping? - Arfa - 05-06-15

Recently I've noticed some weirdness with my Fazer on occasion. If I really push on and accelerate hard, when the bikes gets to about 6-7K revs all of a sudden it just revs like crazy and jumps up to 11K odd! I'll ease off throttle a bit, then the revs settle down and I keep accelerating.

Is this the clutch slipping under the load?
I have tweaked the clutch adjustment (both at lever and at sprocket cover), but it's still doing this.
Time for new clutch plates?

Or is it likely to be something else entirely?

Re: Clutch slipping? - clayt74 - 05-06-15

Increase in revs without increase in speed all points to clutch slip. Presumably you can hear the increase in revs as well and not just trusting the gauge? What mileage is on the bike? But it sounds like time for a new set of plates

Re: Clutch slipping? - Arfa - 05-06-15

Bike has done 32k . And a lot of city riding in that too.

Re: Clutch slipping? - darrsi - 05-06-15

Simple stuff first, adjust clutch from the lower end, then tweak at the top.

Re: Clutch slipping? - Paulfzs - 05-06-15

mines slipping after putting car oil in even though its been fine on it before..

got some oil bought for me asked for bike oil.. friend came back with car oil "guy said itll be fine"..

meh put it in anyway still slipping.. too poor to buy bike oil at the moment so i cant tell if it was that till i get new oil.

Re: Clutch slipping? - darrsi - 06-06-15

(05-06-15, 10:23 PM)Paulfzs link Wrote: mines slipping after putting car oil in even though its been fine on it before..

got some oil bought for me asked for bike oil.. friend came back with car oil "guy said itll be fine"..

meh put it in anyway still slipping.. too poor to buy bike oil at the moment so i cant tell if it was that till i get new oil.

"Car" is the word to focus on here!

Re: Clutch slipping? - maxzer1500 - 06-06-15

(05-06-15, 03:55 PM)Arfa link Wrote: Recently I've noticed some weirdness with my Fazer on occasion. If I really push on and accelerate hard, when the bikes gets to about 6-7K revs all of a sudden it just revs like crazy and jumps up to 11K odd! I'll ease off throttle a bit, then the revs settle down and I keep accelerating.

Is this the clutch slipping under the load?
I have tweaked the clutch adjustment (both at lever and at sprocket cover), but it's still doing this.
Time for new clutch plates?

Or is it likely to be something else entirely? Has the gearbox sprocket cover gasket been left out without adjusting the clutch pushrods end float? Apart from sufficient cable free play the main thing is the screw and locknut under the little round cover, should be backed off something like a quarter of a turn from fully in, go from loose to just feeling pressure. If that don't work, take off sprocket cover, disconnect cable to see how free the mechanism arm is. While in there make sure pushrods is clean, also if seal has worn the rod and if the rod is the same both ends, I would put the outer of the rod to the inside.

Re: Clutch slipping? - Dead Eye - 06-06-15

(05-06-15, 10:23 PM)Paulfzs link Wrote: mines slipping after putting car oil in even though its been fine on it before..

got some oil bought for me asked for bike oil.. friend came back with car oil "guy said itll be fine"..

meh put it in anyway still slipping.. too poor to buy bike oil at the moment so i cant tell if it was that till i get new oil.

Car Oil often has friction modifiers to protect the metal components in the engine - this stuff tends to ruin a wet clutch as it relies on friction to function correctly. This is why you get Motorcycle specific oils as a majority of motorcycles have wet clutches.

Imho, the car oil you added is definitely the cause of your clutch issues. Hopefully the plates are still usable but I'd strip down the clutch and clean the plates up thoroughly and try with new motorcycle oil. Unfortunately some times the damage is already done and it means new clutch plates...

Re: Clutch slipping? - darrsi - 06-06-15

Time to start saving i reckon, 'cos rather than going through all the kerfuffle of cleaning plates and trying proper bike oil, then maybe finding out that it didn't fix it, you may as well change the plates while your hands are dirty and be done with it. They're not that expensive, and the way you rag it they probably need doing anyway.

A fella at my work kept going on about not affording oil for his motor, then his engine seized up and he had to get out a couple of grand loan for a new car.

Some things just need doing right first time, and oiling the engine correctly is one of them.

Re: Clutch slipping? - Arfa - 06-06-15

Have tweaked clutch adjustment, top and bottom. But will revisit to be sure it's right. Have put new gasket on sprocket cover couple months ago when replacing chain. Always used decent castrol bike oil

Re: Clutch slipping? - darrsi - 06-06-15

(06-06-15, 12:42 PM)Arfa link Wrote: Have tweaked clutch adjustment, top and bottom. But will revisit to be sure it's right. Have put new gasket on sprocket cover couple months ago when replacing chain. Always used decent castrol bike oil

Sorry Arfa, my last comment was aimed at Paulfzs.

Out of curiosity, do you know when the clutch cable was last changed?

Re: Clutch slipping? - Arfa - 06-06-15

Doubt it's been changed ever tbh. Worth replacing first?

Re: Clutch slipping? - darrsi - 06-06-15

(06-06-15, 01:15 PM)Arfa link Wrote: Doubt it's been changed ever tbh. Worth replacing first?

If it's never been changed before then yeah i would certainly start there.

My mechanic swears that the Yamaha cables have a much better feel and quality about them than any aftermarket ones.

http://www.ebay.co.uk/itm/New-Genuine-Yamaha-FZS600-Fazer-Clutch-cable-4YR-26335-00-Kupplungszug-/141685079467?pt=LH_DefaultDomain_3&hash=item20fd16bdab

http://www.yamahascooterspares.co.uk/product/yamaha/4YR263350000/cable,%20clutch?uid=0&model=YAMAHA%20FZS%20600%20FAZER%2000-03

Re: Clutch slipping? - Paulfzs - 07-06-15

yeah i have been slacking with it, the bikes at about 25k miles with unknown use before and i should imagine the plates are pretty knackered after my abuse + past life, as you say they arent too expensive to change so i will be doing this next week or so.

admittedly i could have avoided it but i was on a very very tight budget and some oil was better than low old oil.

Re: Clutch slipping? - darrsi - 07-06-15

https://www.youtube.com/watch?v=iQejoxdatGM

Re: Clutch slipping? - Arfa - 08-06-15

(06-06-15, 01:31 PM)darrsi link Wrote: [quote author=Arfa link=topic=17211.msg198449#msg198449 date=1433592930]
Doubt it's been changed ever tbh. Worth replacing first?

Re: Clutch slipping? - Paulfzs - 08-06-15

thanks darsi!

Re: Clutch slipping? - Fraser - 08-06-15

Both my Fazers had soft / not quite good enough clutches even though they were low miles and always bike oil, I bought some heavier clutch springs from WEMOTO, EBC + 10%, less than £20 delivered including new cover gasket.

This may sound weird until you look at your clutch but I only fit 4 of the heavier springs cuz all 6 makes the lever too heavy, obviously fitted in a symetrical pattern,

Re: Clutch slipping? - celticdog - 08-06-15

Good article with link to 12 step guide-

http://www.visordown.com/workshop/diy---how-to-change-your-clutch-plates-and-springs/2444.html

and it's a FZS600, bonus! :thumbup