Engine Braking (Yoyo Slipper question) - 600RR.net
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post #1 of 6 (permalink) Old 05-12-2014, 01:26 PM Thread Starter
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Engine Braking (Yoyo Slipper question)

Guys,

I think my clutch pack is in need of replacement. I'm noticing significant engine braking when I should notice almost zero with the Yoyo Slipper.

Question: Is there a Clutch pack and Springs that I can buy...that will allow more Slippage for the Yoyo? Right now I'm on OEM clutch plates and springs.

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Nesba/N2/PRE/TPM/Roger Lyle "A" Group // CCS #306

'08 GSXR 600 Blue ~ Current Bike
'07 Yamaha R6 Blue ~ SOLD
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post #2 of 6 (permalink) Old 05-12-2014, 06:05 PM
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post #3 of 6 (permalink) Old 05-12-2014, 06:15 PM
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You are severely misunderstanding what a slipper clutch does. It will NEVER EVER EVER freewheel. It's physically impossible. The slipper requires friction from the stack in order to slip. It is the bite from the clutch that causes it to disengage slightly. You actually require a substantial amount of backtorque for the slipper to operate at all.

What you describe is typical operation
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post #4 of 6 (permalink) Old 05-12-2014, 10:58 PM Thread Starter
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Quote:
Originally Posted by wibbly View Post
You are severely misunderstanding what a slipper clutch does. It will NEVER EVER EVER freewheel. It's physically impossible. The slipper requires friction from the stack in order to slip. It is the bite from the clutch that causes it to disengage slightly. You actually require a substantial amount of backtorque for the slipper to operate at all.

What you describe is typical operation
You bring up a good point.

Let me describe my problem. I close the throttle smoothly an at 0% throttle there's enough force to actually throw my bodyweight forward on the bike without any brakes applied.

This does not occur when the bike is in neutral.



However, I've always wanted the Slipper to "slip" sooner if I'm saying that right. So I would like to decrease the amount of backtorque required to get the slipper to operate.

'07 CBR600RR Track-Only Demon!
Nesba/N2/PRE/TPM/Roger Lyle "A" Group // CCS #306

'08 GSXR 600 Blue ~ Current Bike
'07 Yamaha R6 Blue ~ SOLD
'08 CBR600RR Silver ~ SOLD
'06 Yamaha R6 Black ~ SOLD
'08 GSXR 600 TrackOnly ~ SOLD
'08 GSXR 600 White ~ SOLD
'08 Yamaha R6 ~ SOLD
'07 GSXR 750 ~ SOLD
'12 Aprilia RSV4 Factory ~ Crashed/SOLD
'07 CBR600RR Black ~ SOLD
'09 CBR600RR Phoenix TrackOnly ~SOLD
'09 CBR600RR Red/Black ~SOLD
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post #5 of 6 (permalink) Old 05-12-2014, 11:15 PM
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I've had some very slippery slippers in the past and being off throttle alone will never make them slip, you have to engage the clutch quickly on a non-rev matched downshift for it to slip.


You have to remember that the slip action is working against your clutch springs which are critical in keeping the clutch positively engaged under power. With the yoyo for our bikes you're basically stuck with it the way it is. Your only option would be to install softer clutch springs, but that may compromise the engagement of the clutch during hard acceleration


I should add that the yoyo for the 600rr is quite 'slippery' vs other models
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post #6 of 6 (permalink) Old 05-14-2014, 09:41 AM Thread Starter
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Do you know a company that offers lighter clutch springs?

'07 CBR600RR Track-Only Demon!
Nesba/N2/PRE/TPM/Roger Lyle "A" Group // CCS #306

'08 GSXR 600 Blue ~ Current Bike
'07 Yamaha R6 Blue ~ SOLD
'08 CBR600RR Silver ~ SOLD
'06 Yamaha R6 Black ~ SOLD
'08 GSXR 600 TrackOnly ~ SOLD
'08 GSXR 600 White ~ SOLD
'08 Yamaha R6 ~ SOLD
'07 GSXR 750 ~ SOLD
'12 Aprilia RSV4 Factory ~ Crashed/SOLD
'07 CBR600RR Black ~ SOLD
'09 CBR600RR Phoenix TrackOnly ~SOLD
'09 CBR600RR Red/Black ~SOLD
'07 CBR600RR Blue/Silver ~SOLD
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