Yes, you emailed me to say - 'you screwed up, call me and I'll tell you about it'. Thanks for the opinion. Follow my video and it works just fine - many have done it. You chose to change the ball when you weren't told to, goof on you. Enjoy the fruits of my labor[/quote Just for the record, nobody accused you of screwing up. You seem to be a little testy here. Both my emails were extremely polite. As a matter of fact I thanked you profusely for all you do for the community. There was no criticism of anything you do. Everyone's conversion will be a little different, depending on where they start from. In my case from a Bartlett system, which provides an entirely different starting point as I pointed out in my notes above. For instance, I had to replace all friction and clutch plates. None were reusable as they were different from the Yamaha plates. My apologies if you feel offended. I will not bother you again with comments or opinions....
How To Upgrade A Yamaha FJR1300 Clutch To 2016 Slipper With Easy Pull
- Thread starter HyperPete
- Start date
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russperry
Well-known member
I believe it's probably FCC that fixed the design - it just took Yamaha this long to finally implement the change. Maybe they've been more conservative, or cheaper, or whatever,. but this has been done on other makers' bikes in previous model years. This exact subject was covered by a guy on the Z1000 and Ninja 1000 forum after Kawasaki included this slipper + assist upgrade on the 2014 Versys 1000 - he took that list of parts, compared that to the previous clutches used on Z and the Ninja, and the adaptation and results were the same.
Definitely a nice add, and pretty cool that you can upgrade the older bikes....
After having the opportunity to give the upgraded clutch a good workout at EOM this past week, I am feeling much better about having spent the three Benjamins to do this upgrade. I think that maybe the rough casting surfaces on the metal ramps of the pressure plate and hub have "worn in" now and the "slipper" function is becoming more evident. That or I am becoming more confident and used to the action of the new clutch and willing to dump the clutch into a lower gear faster.
On Saturday's loop we were riding some deliciously fast twisties and I was doing a lot of quick 3-2-3-2-3 shifting (even down into 1st on some really tight ones in NC this week!
) and I really appreciated having the slipper / assist clutch's lighter springs.
If you are on the fence about it, I'd say go for it now, before they start raising the parts pricing.
On Saturday's loop we were riding some deliciously fast twisties and I was doing a lot of quick 3-2-3-2-3 shifting (even down into 1st on some really tight ones in NC this week!
If you are on the fence about it, I'd say go for it now, before they start raising the parts pricing.
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mikeames
Well-known member
Foreguve my ignorance, but other than reducing clutch lever pressure, am I correct in understanding that the slipper mod essentially causes the clutch to not grab as hard (or at all) when down shifting? Almost like a "one-way" clutch, it only works when power is applied?
And the idea is that this keeps the rear wheel from locking up during a hard downshift correct?
And the idea is that this keeps the rear wheel from locking up during a hard downshift correct?
Close.
There is still significant friction, and therefore engine braking, when decelerating. It doesn't freewheel in reverse like a sprag clutch would. It is only during extreme back thrust conditions that there is any slippage of the clutch plates, and even then there is still plenty of engine braking occuring, just not enough to lock the rear wheel.
Also, during acceleration and launching the same ramps cause the clutch to grab tighter than just what the spring pressure would create, so the chance of clutch slippage during acceleration is greatly reduced, even with the lighter springs and easier lever pull. In fact, people with slipper clutches may be able to get away with using energy conserving oils that have friction modifier additives (without having the dreaded clutch slipping symptoms) due to the increased clutch clamping pressure.
There is still significant friction, and therefore engine braking, when decelerating. It doesn't freewheel in reverse like a sprag clutch would. It is only during extreme back thrust conditions that there is any slippage of the clutch plates, and even then there is still plenty of engine braking occuring, just not enough to lock the rear wheel.
Also, during acceleration and launching the same ramps cause the clutch to grab tighter than just what the spring pressure would create, so the chance of clutch slippage during acceleration is greatly reduced, even with the lighter springs and easier lever pull. In fact, people with slipper clutches may be able to get away with using energy conserving oils that have friction modifier additives (without having the dreaded clutch slipping symptoms) due to the increased clutch clamping pressure.
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mikeames
Well-known member
Ok, thanks!
