my 82 750 does that for about 30 sec when cold i fidgered it was the cam chain had some slack because it goes away thanks steve
On Apr 25, 8:19 pm, timhortons <[email protected]> wrote: > I still need to do the valves on my 83 750, so I was looking into how > it's done recently, also I know a friend of my dads has a CB750 with > the same engine who's done the valves on his. > > The valves on Honda's have little shims of varying thickness which > make the valves open and close to their proper specification, of > course over time, they wear and thin out or otherwise distort. From > what I've been looking at, on a 750 the shims are placed under the cam > lobes, so what you do is use the tool recommended for compressing the > valve spring, then pop out the shim and insert a new one. Of course, > you don't touch them until you've measured them all and have figured > out which thicknesses have to go in to bring the valves back into > spec. > > As far as I know, the engine of an 82 Nighthawk is exactly the same > mechanically as an 83's, so they both use this little shim scheme. > Your BMW friend may be correct about set screw adjustments for BMW's > (I don't know personally I've never seen internals of BMW engines), > but that is not the case with these Honda engines. > > If doing valve adjustment for the first time, I would suggest setting > up a larger allotment of time to do it in, but on the whole it > shouldn't take very long at all, less than a day if you have > everything you need to do it (you'll get quicker as you get more > comfortable with doing it). I myself haven't done this procedure yet > either, but like I say, my dads friend has and he tackles the valves > on his other bikes too. For him, it only takes somewhere around an > hour to do, of course, he keeps a pile of extra shims of varying > thickness around, so he can pick and choose from without waiting > around or driving somewhere to pick some up. > > You mentioned that you have a shop manual for the bike, so I haven't > gone into too much detail about the procedure, I have a Clymer Manual > which describes the adjustment pretty well, if you'd like to know how > mine details the procedure I can do a little write up. > > Hopefully someone will reply who's actually done the valves though, > bring insight to the nuances (if any) of doing it in reality. I think > you can make a tool to compress the valves too, but I would probably > just say it's less hassle to buy a valve compression tool so you can > get them loose enough to pop shims in and out. > > -timhortons > > On Apr 23, 1:21 pm, Sharpey1 <[email protected]> wrote: > > > > > > > Hello everyone....Ok, new tires, front brakes, brake fluid, oil/air > > filter, spark plugs and getting all visible chrome up to acceptable > > levels of shine has been completed! Tires need to go on, but I'm also > > constructing a poor-man's laser chain/rear wheel alignment tool, but > > more on that later.... > > > The bike has always had this, but I want to address it since I can > > hear it when I start it up....there's what seems to be a sporatic > > knocking sound from the valve cover area, left side of bike. Seems to > > go away, or at least lessen when she warms up.....work with previous > > owner and talked to him....said "Ya, probably need to get the valves > > adjusted." > > > The bike came with a Honda Shop Manual so I assumed he did all this > > stuff to and could hand over the wealth of infomration stored between > > his ears.....started describing the process of pulling shims, > > measuring them, using a special tool, how to go about it, etc.....he > > blankly stared at me and said "That's why I paid someone to do it." > > > Great....so can my fellow Nighhawkian's lend a noob a hand? Does this > > indeed sound like valve misalignment? Does it sound accurate on the > > procedure? The manual I have is actually for another 82' model, a V I > > think instead of an SC but I guess the motor is the same? > > > Special tools? Shims? All this sound right? Something that can be > > tackled fairly easilly or am I looking at a weekend's worth here? I > > also saw the post on Sea Foam and carbon build up issues worth a try? > > > I have a buddy who runs a newer BMW and indicated valve adjustments > > are simply set screw adjustments and no big deal....want to make sure > > I'm looking at the right thing in the manual as well, figure BMW'ers > > would never think about seeing the inside of their engine anyway so I > > take that with a grain of salt....thanks in advance everone! > > > -Dan- > > > -- > > 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 > > athttp://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 > athttp://groups.google.com/group/nighthawk_lovers?hl=en.- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. 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