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GSXR1000 Brocks clutch mod question

2.8K views 31 replies 3 participants last post by  BillV  
#1 ·
Greetings. I am looking for a solid answer from anyone who may have installed the Brocks ultralight clutch mod. I am trying to determine the orientation of the clutch pack spacer: cone inward towards engine or outward. Thanks!
 
#3 ·
Thanks for the reply. I know how the flat washer & jutter spring go (cone of the jutter faces engine, just like the Bellville washer behind the basket. With the Brocks clutch mod, there is a conical spacer that is inserted in the basket before the flat washer & jutter spring in your pic. I have been told that just like all the other springs the Brocks clutch spacers cone should face the engine. I am looking for clarification from someone who might have one installed.
 
#6 ·
"just like the Bellville washer behind the basket"
Not sure what you mean here. The washer behind the basket is a thrust washer that is chamfered on the side that faces the transmission. The only Bellville's I can think of are the judder spring beneath the clutch pack, the one beneath the hub nut, and the three reaction waves that are associated with the slipper clutch. I have limited knowledge of the Brocks parts but thought that they mainly disabled or removed the slipper feature.
 
#26 ·
"The first fiber with the larger ID has to mate with that."
The service manual says all drive plates except the innermost have a 111 mm I.D. The outermost has a black marking but I don't know what's different about it. They all have the same 2.8 mm thickness & 13.9 mm claw width.

The TOWARDS pic above looks flat. So if it's conical, it's not by much.

At the risk of complicating things with irrelevant info, I note that Yoshimura sells stiffer and weaker reaction wave washers under pn A-D7210-62S & A-D7210-62R. I assume that their thickness is slightly different. If you're only going to use one washer, one that's stronger or weaker might have some use.
 
#32 ·
Suzuki's vague about the alternate thicknesses. I assumed it was to adjust the stack height for accumulated manufacturing tolerances and/or wear.

I've been snooping around and noticed an error in the clutch parts fiche. If you look here, you'll see parts 21, 23, and 24 are the hub nut, hub washer, and hub wave washer. The picture has the hub washer located between the nut and the wave washer. The order should actually have the wave washer in the middle. It's been this way for eighteen years now and traces back to the original release from Japan. They got it right in K7. I also see pics of the 09160-25073 driven gear thrust washer and the 09160-25077 hub washer as blue, indicating that they're hardened. But the 09160-25056 hub thrust washer (22 in the fiche) is not. Go figure.