Clutch animal, don't you just hate this....


User avatar
Jeff Bennetts
Posting God
Posting God
Posts: 2485
Joined: Wed Mar 05, 2003 8:38 am
Location: Ohio, USA
Location: Ohio, USA

Re: Clutch animal, don't you just hate this....

Post by Jeff Bennetts »

Usually people just torque away until the longer shouldered bolt splits the tower, you can’t see it happening because the clutch lifter plate obscures your view.

User avatar
derherr65
Forum Regular
Forum Regular
Posts: 28
Joined: Fri Jul 09, 2021 8:41 pm
Location: Texas!
Location: Texas
Contact:

Re: Clutch animal, don't you just hate this....

Post by derherr65 »

What should the torque be? I don't see it in the manual.
1982 CBX chopper.
2016 Triumph Trophy SE

daves79x
ICOA Technical Director
ICOA Technical Director
Posts: 4876
Joined: Sun Oct 01, 2006 8:05 am
Location: Knox, PA
Location: Knox, PA

Re: Clutch animal, don't you just hate this....

Post by daves79x »

Use common sense - just tight enough.

Dave

Larry Zimmer
ICOA Web Post/Pix/Video Archive Mgt
ICOA Web Post/Pix/Video Archive Mgt
Posts: 2295
Joined: Mon Dec 15, 2003 2:32 pm
Location: Brighton, MI
Location: Brighton, Mich
Contact:

Re: Clutch animal, don't you just hate this....

Post by Larry Zimmer »

When all else fails, check the General Information section of the shop manual. I lists general torque values for the various size bolts and fasteners. Memory is standard strength 6mm bolts at 7-9 ft-lbs. Grade 9 (10.9 metric) at 9-12 ft-lbs.
Larry Zimmer
cbxlarry@sbcglobal.net

User avatar
derherr65
Forum Regular
Forum Regular
Posts: 28
Joined: Fri Jul 09, 2021 8:41 pm
Location: Texas!
Location: Texas
Contact:

Re: Clutch animal, don't you just hate this....

Post by derherr65 »

Larry Zimmer wrote:
Wed Dec 22, 2021 11:20 am
When all else fails, check the General Information section of the shop manual. Memory is standard strength 6mm bolts at 7-9 ft-lbs. Grade 9 (10.9 metric) at 9-12 ft-lbs.
Thanks! I assumed there would be a specific value listed and wanted confirmation before I defaulted. :text-goodpost:
I now have a functional clutch! I ended up disassembling, cleaning/scuffing all surfaces with 000 steel wool, and submerging in oil and vacuum drying/ oil infusing. Worked first try after assembly!
1982 CBX chopper.
2016 Triumph Trophy SE

daves79x
ICOA Technical Director
ICOA Technical Director
Posts: 4876
Joined: Sun Oct 01, 2006 8:05 am
Location: Knox, PA
Location: Knox, PA

Re: Clutch animal, don't you just hate this....

Post by daves79x »

The shouldered bolts will split the towers, every time.

Dave

User avatar
derherr65
Forum Regular
Forum Regular
Posts: 28
Joined: Fri Jul 09, 2021 8:41 pm
Location: Texas!
Location: Texas
Contact:

Re: Clutch animal, don't you just hate this....

Post by derherr65 »

daves79x wrote:
Sat Jan 01, 2022 8:01 am
The shouldered bolts will split the towers, every time. Dave
Using the above specs? Or only when over tightened?
1982 CBX chopper.
2016 Triumph Trophy SE

daves79x
ICOA Technical Director
ICOA Technical Director
Posts: 4876
Joined: Sun Oct 01, 2006 8:05 am
Location: Knox, PA
Location: Knox, PA

Re: Clutch animal, don't you just hate this....

Post by daves79x »

My advice, given hundreds of times, is to just follow the manual.

Dave

Larry Zimmer
ICOA Web Post/Pix/Video Archive Mgt
ICOA Web Post/Pix/Video Archive Mgt
Posts: 2295
Joined: Mon Dec 15, 2003 2:32 pm
Location: Brighton, MI
Location: Brighton, Mich
Contact:

Re: Clutch animal, don't you just hate this....

Post by Larry Zimmer »

I would say that spec would crack them. That shoulder is a wedge.
Larry Zimmer
cbxlarry@sbcglobal.net

scottish CBX
Forum Regular
Forum Regular
Posts: 58
Joined: Mon Dec 26, 2022 7:25 am
Location: Dingwall
Location: Bonnie Scotland

Re: Clutch animal, don't you just hate this....

Post by scottish CBX »

I am re-assembling the clutch now and have just hit this issue. The first problem I had was I had installed the lifter plate with springs (the two longer bolts first to compress the new EBC springs) but then realised that I should have tightened the main nut first, doh! But before that, I had to grapple with the issue of aligning the 4 lugs on the back of the basket with the sprocket. It's quite tricky because you cannot see them meshing together and I was worried that if they were not aligned properly you could damage the sprocket. Thankfully the lugs are tappered a bit to aid installation.

Gentle tapping of the basket appeared to get them lined up and then I installed the washer (the right way round!) and torqued it to the specified amount. Like others I could not find the torque settings for the lifter plate so it will be 10ft-lbs, or tight enough!

User avatar
NobleHops
ICOA Member
ICOA Member
Posts: 3915
Joined: Mon Jan 25, 2010 7:17 am
Location: Tucson, Arizona, USA
Location: Tucson, Arizona, USA

Re: Clutch animal, don't you just hate this....

Post by NobleHops »

You may live to regret those EBC springs.
Nils Menten
Tucson, Arizona, USA
'82 CBX, among others.

scottish CBX
Forum Regular
Forum Regular
Posts: 58
Joined: Mon Dec 26, 2022 7:25 am
Location: Dingwall
Location: Bonnie Scotland

Re: Clutch animal, don't you just hate this....

Post by scottish CBX »

Is that because they are stiffer than the originals or that they are not great quality?? Or, something else?

CBX-tras
ICOA Member
ICOA Member
Posts: 460
Joined: Tue Feb 16, 2010 1:29 pm
Location: Clinton Twp, Michigan
Location: Clinton Twp., Michigan, USA

Re: Clutch animal, don't you just hate this....

Post by CBX-tras »

Stiffer.

Larry Zimmer
ICOA Web Post/Pix/Video Archive Mgt
ICOA Web Post/Pix/Video Archive Mgt
Posts: 2295
Joined: Mon Dec 15, 2003 2:32 pm
Location: Brighton, MI
Location: Brighton, Mich
Contact:

Re: Clutch animal, don't you just hate this....

Post by Larry Zimmer »

One other comment regarding bolt torques: Typically bolt torques are specified for DRY threads. If oil is to be used, a manual will usually specify that. Oiled threads usually should be torqued to 15% less than a given spec. Unless specified.
Larry Zimmer
cbxlarry@sbcglobal.net

User avatar
NobleHops
ICOA Member
ICOA Member
Posts: 3915
Joined: Mon Jan 25, 2010 7:17 am
Location: Tucson, Arizona, USA
Location: Tucson, Arizona, USA

Re: Clutch animal, don't you just hate this....

Post by NobleHops »

What JR said - they are a harder pull, for no benefit that I can see.
Nils Menten
Tucson, Arizona, USA
'82 CBX, among others.

Post Reply

Return to “ENGINES: Maintenance, Performance, Parts Sources”