Duh... it replaces the steel plates ? I really don't know how to bridge this but a clutch is a sandwich of seven plate sets. One of steel and one of a faced steel. The Kevlar plates should be replacing the faced plates. (by "faced" I'm referring to the material that is bonded to the steel) The steel only plates are driven by the clutch hub and drive the "faced" plates that in turn drive the clutch outer (basket) The number of these sets is usually seven. The springs apply the pressure to make all this work and force out the oil between them. When disengaged, the clearance total between all these pieces is only .060" when adjusted properly. An improperly adjusted clutch has even less clearance. This small amount is why oil viscosity makes a difference.
________________________________ From: Stephen D'Auria <jamminje...@hotmail.com> To: nighthawk_lovers@googlegroups.com Sent: Sun, February 7, 2010 1:03:55 AM Subject: RE: [Nighthawk Lovers] Question 1991-2003 CB750 Clutch Expected mileage for kevlar? In my research all I can find are the words "long lasting". Off the bat we know it is not going to last as long as OEM steel. The life of a clutch also depends a great deal on the rider and application. Considering I got 23k out of my OEM clutch I think 10-15 is probably a reasonable expectation??? The truth is nothing on the market is as durable as steel plates but there are a ton of materials that will grab better. I believe kevlar is the most durable as well as heat resistant of these alternate materials. It should make for a more aggressive clutch but I hope not too aggressive. We'll find out soon enough. Like I said I see nothing but good reviews on this KG stuff and it is nice to hear you've heard good things about them too Dennis. I hope this works really well because those plates are only $50. If it works great for that price I'll happily change them every 5k if I had to. ________________________________ Date: Sat, 6 Feb 2010 14:20:02 -0800 From: blues...@yahoo.com Subject: Re: [Nighthawk Lovers] Question 1991-2003 CB750 Clutch To: nighthawk_lovers@googlegroups.com I'll buy that. Kevlar ? Expected mileage ? ________________________________ From: Stephen D'Auria <jamminje...@hotmail.com> To: nighthawk_lovers@googlegroups.com Sent: Sat, February 6, 2010 5:16:39 PM Subject: RE: [Nighthawk Lovers] Question 1991-2003 CB750 Clutch Using washers to tension the springs would still increase strain on the clutch cable. It is more or less the same as installing stronger springs but a cheaper solution. Using Kevlar friction plates with the soft OEM springs wouldn't change the tension on the cable and should allow for better grip while also allowing the clutch to engage smoothly. ________________________________ Date: Sat, 6 Feb 2010 13:52:30 -0800 From: tinkrm...@yahoo.com Subject: RE: [Nighthawk Lovers] Question 1991-2003 CB750 Clutch To: nighthawk_lovers@googlegroups.com Maybe the way to go is with the spacers like Dennis suggested, and the oem clutch plates. Stanley --- On Sat, 2/6/10, Stephen D'Auria <jamminje...@hotmail.com> wrote: >From: Stephen D'Auria <jamminje...@hotmail.com> >Subject: RE: [Nighthawk Lovers] Question 1991-2003 CB750 Clutch >To: nighthawk_lovers@googlegroups.com >Date: Saturday, February 6, 2010, 12:07 PM > > > >I am not going to ride with a jerky clutch! My bike (my subconscious) would > >think I was a jerk! The idea is to make her soft and smooth but able to grip > >like a vise. >________________________________ >Date: Sat, 6 Feb 2010 09:04:52 -0800 >From: tinkrm...@yahoo.com >Subject: Re: [Nighthawk Lovers] Question 1991-2003 CB750 Clutch >To: nighthawk_lovers@googlegroups.com > > >Yes- and not to mention the added shock to the reciprocating parts of the >engine from the sudden jerk of a heavy clutch. In VW Beetles, Gene Berg sold >a device that gave a slight cushion to the engagement of a racing clutch to >soften the blow. Not just to the crankshaft, but the relatively soft >magnesium alloy case as well. >You see, the crank is forged, rather than cast, so that it can flex without >breaking. A certain amount of flex is required, because of the flexibility of >the case. A cast crankshaft would break from the flexing; indeed, even some >forged ones do from time to time. It is rare, and the only one I have >knowlege of personally, the engine still ran, although with a wierd noise and >rhythm. But itran!! >Upon teardown, lo and behold: broken crank! > >Stanley > >--- On Fri, 2/5/10, Dennis Hammerl <blues...@yahoo.com> wrote: > > >>From: Dennis Hammerl <blues...@yahoo.com> >>Subject: Re: [Nighthawk Lovers] Question 1991-2003 CB750 Clutch >>To: nighthawk_lovers@googlegroups.com >>Date: Friday, February 5, 2010, 10:16 PM >> >> >> >> >>My simple answer is to replace with OEM. It lasted 23k and won't have the >>problems of an aftermarket clutch. A simple boost for the springs is one >>spark plug washer under each spring. No more, just one. Heavy springs are a >>strain on the clutch cable and make for jerky starts. Nasty clutches are for >>racers, not street bikes. They get old fast. Hard riding makes for grooves >>worn on the clutch basket, which in turn makes for a less than smooth >>operation. Do what you want, I just don't care for aftermarket clutches. Put >>enough in bikes in my time... Proper adjustment makes for long life on the >>OEM. >> >> >> >> ________________________________ From: Stephen D'Auria <jamminje...@hotmail.com> >>To: nighthawk_lovers@googlegroups.com >>Sent: Fri, February 5, 2010 2:43:27 PM >>Subject: RE: [Nighthawk Lovers] Question 1991-2003 CB750 Clutch >> >> >>Thinking about this more. Would it be better to keep the stock plates and >> >>go with some heavier springs? I really want this thing to stick in the >> >>high RPM range mind you... >> >>Reading reviews on the Barnett stuff... doesn't look good... >> >>________________________________ >>From: jamminje...@hotmail.com >>To: nighthawk_lovers@googlegroups.com >>Subject: [Nighthawk Lovers] Question 1991-2003 CB750 Clutch >>Date: Fri, 5 Feb 2010 11:30:50 -0800 >> >> >>I am looking for the best clutch kit on the market. I do a lot of sport >> >>riding on CA-2 with my hawk and it is time for a new clutch. It still has >> >>the stocker with about 23k on it. It is slipping too much and I know it is >> >>just the clutch not the oil I am using... time for a new one. Looking for >> >>the best of the best regardless of price. I am in love with this bike and >> >>it deserves nothing less! Any suggestions? >> >>All I seem to find are those Barnett clutch kits... are they any good? >> >>Once I get the parts I can document the rebuild in case any of you should >>want to do the same. :D >> >>Thank you very much! >> >>Peace and grease >>~Aldo >> >>________________________________ >>Hotmail: Trusted email with Microsoft’s powerful SPAM protection. Sign up >>now. >>-- >>You received this message because you are subscribed to the Google Groups >>"Nighthawk Motorcycle Lovers!" group. >>To post to this group, send email to nighthawk_lov...@googlegroups.com. >>To unsubscribe from this group, send email to >>nighthawk_lovers+unsubscr...@googlegroups.com. >>For more options, visit this group at >>http://groups.google.com/group/nighthawk_lovers?hl=en. >> >>________________________________ >>Hotmail: Free, trusted and rich email service. Get it now. -- >>You received this message because you are subscribed to the Google Groups >>"Nighthawk Motorcycle Lovers!" group. >>To post to this group, send email to nighthawk_lov...@googlegroups.com. >>To unsubscribe from this group, send email to >>nighthawk_lovers+unsubscr...@googlegroups.com. >>For more options, visit this group at >>http://groups.google.com/group/nighthawk_lovers?hl=en. >> >>-- >>You received this message because you are subscribed to the Google Groups >>"Nighthawk Motorcycle Lovers!" group. >>To post to this group, send email to nighthawk_lov...@googlegroups.com. >>To unsubscribe from this group, send email to >>nighthawk_lovers+unsubscr...@googlegroups.com. >>For more options, visit this group at >>http://groups.google.com/group/nighthawk_lovers?hl=en. >> > >-- >You received this message because you are subscribed to the Google Groups >"Nighthawk Motorcycle Lovers!" group. >To post to this group, send email to nighthawk_lov...@googlegroups.com. >To unsubscribe from this group, send email to >nighthawk_lovers+unsubscr...@googlegroups.com. >For more options, visit this group at >http://groups.google.com/group/nighthawk_lovers?hl=en. > >________________________________ >Hotmail: Free, trusted and rich email service. Get it now. -- >You received this message because you are subscribed to the Google Groups >"Nighthawk Motorcycle Lovers!" group. >To post to this group, send email to nighthawk_lov...@googlegroups.com. >To unsubscribe from this group, send email to >nighthawk_lovers+unsubscr...@googlegroups.com. >For more options, visit this group at >http://groups.google.com/group/nighthawk_lovers?hl=en. > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lov...@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en. ________________________________ Hotmail: Trusted email with powerful SPAM protection. Sign up now. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lov...@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lov...@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en. ________________________________ Hotmail: Free, trusted and rich email service. Get it now. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lov...@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lov...@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
