Clutch slipping 05 busa

[Jeremyg1283]

So my bike has 13k on the clock. The clutch is slipping at WOT 6k up, thru the power band . Itw not too bad but definitely isnt proforming at its best. It doesn't slip
on launch or anywhere else. I am gonna grab some aftermarket stiffer springs. What springs do people suggest?

[turbo051k]

Best thing is to replace the entire clutch pack with a new one,drain the oil drop the pan and clean any clutch dust/sludge that may have settled on the pan,clean the oil pick-up out as well. IMO,the instant a clutch slips under power and the revs climb,I replace it as its shot. Some of you may feel differently.

Definitely get HD springs,you can try 3-OEM/3-HD first as all 6HD springs may be a bit too much.

[Red]

So my bike has 13,000 on the clock.

The clutch is slipping at WOT 6,000 RPM up, through the power band .

It's not too bad but definitely isn't performing at its best.

It doesn't slip on launch or anywhere else.

I am gonna grab some aftermarket stiffer springs.

What springs do people suggest?

Added the clutch modification taking out the lock cam ~ I'm sure that it's slipping at launch RPM's too .  .  .




 




With modifications ~ comes maintenance .  .  .

[piratediverjefff]

Hopefully it's not just in 2nd gear bro,or the trans. is comin' out.

[piratediverjefff]

Best thing is to replace the entire clutch pack with a new one,drain the oil drop the pan and clean any clutch dust/sludge that may have settled on the pan,clean the oil pick-up out as well. IMO,the instant a clutch slips under power and the revs climb,I replace it as its shot. Some of you may feel differently.

Definitely get HD springs,you can try 3-OEM/3-HD first as all 6HD springs may be a bit too much.

A-1 advice right there.

On my little Stage 1 turbo bike I still had the original OEM clutch plates from 2003 until it got parted out in 2011 with 23,000 miles on them.Ran 3 factory/3 heavy springs and with 260 hp clutch never slipped in 8 years(2nd gear went though after around 7,000 miles so Chris put in a Carolina Cycles trans.).

[Ghost-Geezer]

Used Brock's "Starfish-Shaped" back torque eliminator plus their backing plate with 2 HD springs and 4 standards.  Not too heavy a pull at the bar and no-slip, all grip........every gear.  Stock plates.  Only 206 RWHP.

[Jeremyg1283]

Thanks for the input guys. I have the Brocks HD springs coming and if that doesnt do it then I will swap out for another OEM clutch pack.

[Dillon]

As a quick check on clutch wear you can take your filler cap off and see how much you have left in the short slot of the basket. But the best way is to pop the plates out inspect and measure the stack height.

Also I wouldn't go putting heavy springs in without a slave support or you might crack your casing.

[turbo051k]

Also I wouldn't go putting heavy springs in without a slave support or you might crack your casing.

Most definitely,thats a requirement even more so with all 6 HD springs. IMO,6 is overkill on a stock, N/A engine. You will crack the counter shaft cover where the slave cylinder bolts to it,in no time.

Jeremy,I'm almost 100% certain I have a slave-support for a Gen1 laying around in the shop. It's a "must have" on a Gen1 w HD springs

[Dillon]

Ah you call it a "counter shaft cover" some call it a "sprocket cover" I call it a casing but all the same thing when it cracks

[Ghost-Geezer]

Ah you call it a "counter shaft cover" some call it a "sprocket cover" I call it a casing but all the same thing when it cracks

Yes, I agree completely with the "slave support"/"sprocket cover", and I should have mentioned it earlier.  Even on my Gen II, we put one on when the heavier spring pack was installed.  Sorry, I forgot that important detail.   

[Sport]

With only 13K on it, why is it slipping?  Dragbike?

[Dillon]

With only 13K on it, why is it slipping?  Dragbike?

Another good point. I missed the 13k, with that sort of mileage I think I would pull the pack and have a looksee.

BTW  GG I'm British so hence the language difference.

[piratediverjefff]

He does have a slave support and wants to try out 3 of the heavier springs,if that doesn't do it then will throw in a new OEM clutch pack.

[Dillon]

It could be as simple as what oil he is running, A lot don't like fully synth, mine for one. Any way let us know how you  get on.

[Jeremyg1283]

I am gonna change up the oil. I will put my slave support on once i get the hd springs. Does it say how to measure the stack in te manual?

Oil recommendations?

[Dillon]

To measure stack height you literally stack up both drive and steel plates and measure the height. Nominal is 50.2mm

as for oil I prefer Castrol power1 semi synth.

[Sport]

Amsoil, 10/40 full synth.  Sold my 82 six cylinder air cooled CBX with 102,000 miles on it with a steady diet of Amsoil.  It's still on the road.  My 06 Busa has 53,000+ and has always had Amsoil and K&N filters.  It has the original clutch.  No slip and I lose about a half cup between changes.  Good stuff!

[Jeremyg1283]

To measure stack height you literally stack up both drive and steel plates and measure the height. Nominal is 50.2mm

as for oil I prefer Castrol power1 semi synth.

awesome. Simple enough.
Thanks for the clutch diagram!

[Dillon]

sorry two things to remember, on the later models the first (B) plate was replaced with the three part mod but its still the same thickness, and finally my old gripe remember to put the last plate in one slot round its important. (I'll give any one a chocolate muffin if they can tell me why).


 

[Rocketgeezer]

Mine did the same thing when the Turbo was first installed, I put in the HD springs and never had a problem after that and its over 45K with Turbo, did no other mods to the clutch, of course I'm a old fart and dont pound the hell out of it ether, just one other thing, keep the oil changed, I really don't have a oil preferance just stay with a good brand name with NO weird additives

[sportbikeryder]

sorry two things to remember, on the later models the first (B) plate was replaced with the three part mod but its still the same thickness, and finally my old gripe remember to put the last plate in one slot round its important. (I'll give any one a chocolate muffin if they can tell me why).

Moving the last fiber to the shallow slot is not required. Best I can tell it is an indicator for replacement of the clutch as it prevents the clutch from engaging on a worn stack. If it is placed in the "normal" slots, the clutch pack can be much smaller and still be loaded by the standard pressure plate.

[Ghost-Geezer]

sorry two things to remember, on the later models the first (B) plate was replaced with the three part mod but its still the same thickness, and finally my old gripe remember to put the last plate in one slot round its important. (I'll give any one a chocolate muffin if they can tell me why).

Moving the last fiber to the shallow slot is not required. Best I can tell it is an indicator for replacement of the clutch as it prevents the clutch from engaging on a worn stack. If it is placed in the "normal" slots, the clutch pack can be much smaller and still be loaded by the standard pressure plate.

When John speaks, I would advise us all to listen. 

[Dillon]

sorry two things to remember, on the later models the first (B) plate was replaced with the three part mod but its still the same thickness, and finally my old gripe remember to put the last plate in one slot round its important. (I'll give any one a chocolate muffin if they can tell me why).

Moving the last fiber to the shallow slot is not required. Best I can tell it is an indicator for replacement of the clutch as it prevents the clutch from engaging on a worn stack. If it is placed in the "normal" slots, the clutch pack can be much smaller and still be loaded by the standard pressure plate.

Where would you like your Muffin sent Sir.

[BATTMAN]

There's no reason to use heavy springs on a almost stock bike.  You are not overpowering the clutch.  The issue is in the clutch.  You have one or more steels or fibers that are worn.  Your stack height is below 2.000.  It could also be that your pressure plate is loose or your springs are worn.  Open it up and it will tell you the answer within 10 min.