I have had mine at Circuits of the Americas a few times (I know, a little long of a track, with hard brake zones) and worked over the slipper a bit. Then yesterday I was at a smaller, more technical track and it seemed to slip a tad. I might need new frictions, so if I do, I would like to upgrade. I just need to figure out what's better though.
Before you decide to change it (unless you just want to), take a look at the basket. If it has grooves in it then the plates might be hanging up. I had this happen on a previous bike. Just sanded the grooves out and made sure the plates had no glazing and it worked like new again. If you do in fact need plates because they are just worn, check the manual for what the stack should measure then check yours. If it's within spec then it might be glazing.
Ya. My ducati chewed up the basket, but that kind of normal on a dry clutch. If I go into it, I'm replacing the frictions. There's no reason not too, for roughly $100.
I have another track day next weekend, so I'll see how it acts and go from there.
I'm not sure why you would replace them if they don't need to be replaced. I would definitely keep a spare stack on hand just in case but if it is an issue with the basket and the friction plates are fine then I see no reason to replace them.
It's one of those things that if a few guys chimed in and said "if you are going to race, get these clutches". I would go ahead and get them, then crack it open to see what's going on inside. If nothing looked real bad, I'd toss the new clutches in and roll with it. If I opened it up to see a basket problem or other, then I would order what I need and replace it all with better parts.
Either way, I'm going to run it this weekend and see what happens. After that, I have COTA, then Texas World Speedway, which are long tracks, so I'll be on the Ducati. >
I only did two track days on my 300, second session on the second track day i noticed the clutch wasnt holding very well. I got a zx6r for the track after that so havent had any more trouble with the clutch on the street with the 300, but there is definitely something that needs to be improved with the stock clutch. Take a good look when you do crack it open, I never had a slip under power but on upshifts it would start to take a full second from when I released the clutch lever until it was fully engaged while shifting without letting off the throttle.
I'm almost wondering if stronger springs are needed.
On the plus side, I took the huge oil filler cap off and you can see the clutch very well. It's very clean and the basket looks good. I think I'm going to look into springs for more pressure and good frictions for holding power.
Doing some searching, it does look like the springs are the culprit. Barnett spring *should* take care of it. Springs are only $20, springs, steels and clutches are $110. Might as well do it all and run with it.
If your in there you should do the shift detent kit (if you are experiencing miss shifts). Spears makes a kit.
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