Clutch slips. - MVAgusta.net
 
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post #1 of 6 (permalink) Old 01-07-2020, 10:44 PM Thread Starter
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Clutch slips.

Anytime I get hard on the throttle my RMPs shoot up but my speed doesn't increase.

I have a F3 800 15 engine in my bike that has the clutch slipping issues. I also have a 2013 f3 600 engine that isn't being used.

The parts seem to match going off online part pieces for sale online. I know the 800 has a slipper clutch but the 600 doesn't but the parts still seem the match.

Can I pull the clutch plates out of the 600 and put them in 800 bike? Is there thing I should know about before I make this attempt if it is possible?
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post #2 of 6 (permalink) Old 01-07-2020, 10:54 PM
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I had the same problem and solved it for free by putting a 2mm washer/shim inline with the spring.

I posted the solution with detailed pictures in the technical section for 3 cylinder engines.

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post #3 of 6 (permalink) Old 01-08-2020, 10:21 AM
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The 675 plates will work. The clutch stack height is important. When it gets less than required the clutch slips, also when the plates get glazed the clutch slips.

De-glaze all the plates you intend to use before assembling the clutch stack. Emory cloth and a hard flat surface will do if you don't have access to a blast unit.

Also make sure the clutch cable/lever has a little play because when the clutch gets hot the cable gets a little tighter and could allow the clutch to slip. Cheers

D23
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post #4 of 6 (permalink) Old 01-08-2020, 03:33 PM
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In addition to the above, remove the clutch cover and inspect the 6 hex screws for tightness as well as the extension pieces which they screw into. In my slipper clutch, the extension piece became loose resulting in lost pressure and clutch slippage.
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post #5 of 6 (permalink) Old 01-08-2020, 06:31 PM Thread Starter
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So I opened up my clutch and I noticed I was missing a Clutch Plate and a Friction disc compared to what is listed in the clutch assembly parts list for buying parts online. The parts list shows 6 plates and friction discs in the middle and mine only have 5 of each. Is that significant? Do I need to add another clutch plate and friction disc?

Also, I noticed Friction discs all had a flat spots on portion that was right next to where it was notched on the outside. All 3 notches had flat spots on both sides for all the middle plates on both sides, so I don't if this is a feature of the friction disc or if this is just where they all wear down first- Is this wear or a normal feature?

Thanks for all the replies.
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post #6 of 6 (permalink) Old 01-08-2020, 09:11 PM
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Yeah that will do it. Springs are looser aswell with less plates.

Pictures would help...Not sure about the flat spots your referring to but in the topic clutch issues I go over the thickness of the friction material tolerances. If it's not within range replace them.

If you have one side thicker (friction material) than the other you could have a combo of weak and stronger springs.

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