No Graham, this is different. I am almost sure the sound is related with the chain. To give you an idea, it is similar to the sound made when you are changing gears on a mountain bike. Initially I thought it could be that the chain got too loose after the trip back home. As I said, just to tried to adjusted it leaving almost no slack, and the sound got worse! Conversely, loosing the chain back minimizes the problem.
Now, the rear brake issue is also different to what you saw. When I said that it was stuck, I am actually talking about the shaft. In fact, I took the rod, spring and all that off. So with my hand I moved the shaft to apply the brake. Doing just that the brake will get stuck, and I would need to pull firmly back to disengage, like if the pads where sticky inside the drum. This problem was _solved_ when I loosed up a bit the axle nut. Now it seems to be working perfectly. So I assume it was that, too much torque applied on the axle nut. Question is, how much torque _must_ be applied? I don't want the rear wheel to come lose while driving on the highway ;). As I said, more puzzling is the fact that loosing the axle nut seems to help with the chain noise. It is almost gone, although I need to drive a bit longer to confirm that. Graham, could you check on your little book for the 750 if it has information about the torque needed on the rear axle nut? Javier. On Wed, May 19, 2010 at 12:08 PM, Graham Rogers <[email protected]> wrote: > Javier, is it the same sound we heard when we would apply the brake and the > spring didn't return the brake to it's free position? > > On May 19, 2010, at 11:59 AM, Javier Garcia wrote: > > Yes, I understand why it can be too tight, nor too loose. I am just > wondering if there is a more precise way to set the chain slack, instead > just -somewhere between the two extremes-. Perhaps it doesn't matter, but I > am worried about the cracking sound. > > Javier. > > On Wed, May 19, 2010 at 11:37 AM, David Cummings < > [email protected]> wrote: > >> about #5 - on any bike with rear suspension, you need more chain slack >> than you would think (like say on a bicycle). This is because the >> effective chainstay length changes as you compress the shocks. If you >> got it fairly tight without any weight on the seat, it's probably too >> tight when you are sitting on it, much more so if you go over a bump >> with the rear. >> Of course, this is all from working with friends' bikes, my 700s >> doesn't have this issue :-) >> >> On Wed, May 19, 2010 at 11:05 AM, paul annen <[email protected]> >> wrote: >> > the only answer i have is to #4... it is called a torque wrench.... and >> #5 >> > alot of people use there pocket change to measure ther chain slack... >> damn >> > im glad my GL is shaft drive... >> > >> > On Wed, May 19, 2010 at 10:45 AM, Javier Garcia <[email protected]> >> wrote: >> >> >> >> Hi all, >> >> >> >> I have a couple of questions concerning the chain and rear brake of a >> 96 >> >> NH 750. When I visited Graham last week we adjusted the chain (among >> other >> >> things), since it was quite loose. Once I got back home I start hearing >> some >> >> kind of clocking noise when I start from a stop. It appears to be >> related to >> >> the chain somehow. It is difficult to describe, but once the bike start >> >> moving I can hear some "crank, crank, crank" few times and then goes >> away >> >> when I increase the speed. I cannot tell if still makes that sound when >> >> moving faster. Last night I though maybe the chain need to be >> readjusted or >> >> something (although I never experienced this when the chain was too >> loose). >> >> This time I tensioned the chain a bit more, leaving just a little slack >> >> (perhaps was even too tight). The noise then got worse, I could hear >> the >> >> same thing just at the instant that the wells start moving. Then I >> loose the >> >> chain again, and came back to the original point where I was, with the >> same >> >> noise. >> >> Since I moved the wheel back and forth, I had to adjust the rear brake >> as >> >> well. The I noticed that it was getting stuck after applying it. I >> mean, I >> >> push the leaver, it comes back, but the brake is still stuck. I had to >> move >> >> it with my hand to disengage. I went to the Common Service Manual to >> check >> >> what I was doing wrong, and then I saw in the section about chain >> adjustment >> >> "After adjustment, retighten the axle nut to the specified torque" (pag >> 46). >> >> I remember I had tighten the nut really hard. So I loose it up a little >> bit, >> >> and then voila!, the brake is working fine again. I drove it today, and >> >> actually the noise had been reduced as well, although I still hear an >> small >> >> crank when starting from stop. >> >> >> >> Questions: >> >> >> >> 1) Does any of this makes sense? >> >> >> >> 2) Could the noise be related to the torque applied on the axle nut >> >> instead of the chain tension? >> >> >> >> 3) How do I know what is the right torque for this bike? >> >> >> >> 4) Is there a tool that indicates which torque is being applied to the >> >> nut? >> >> >> >> 5) How much slack should the chain have? is there any consistent way to >> >> measure it? >> >> >> >> Thanks in advance, >> >> Javier. >> >> >> >> -- >> >> You received this message because you are subscribed to the Google >> Groups >> >> "Nighthawk Motorcycle Lovers!" group. >> >> To post to this group, send email to [email protected] >> . >> >> To unsubscribe from this group, send email to >> >> [email protected]<nighthawk_lovers%[email protected]> >> . >> >> 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 [email protected]. >> > To unsubscribe from this group, send email to >> > [email protected]<nighthawk_lovers%[email protected]> >> . >> > 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 [email protected]. >> To unsubscribe from this group, send email to >> [email protected]<nighthawk_lovers%[email protected]> >> . >> 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 [email protected]. > To unsubscribe from this group, send email to > [email protected]. > 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 [email protected]. > To unsubscribe from this group, send email to > [email protected]<nighthawk_lovers%[email protected]> > . > 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. 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