-----Original Message----- From: nighthawk_lovers group [mailto:[EMAIL PROTECTED] Sent: Thursday, November 13, 2008 5:01 AM To: nighthawk_lovers digest subscribers Subject: nighthawk_lovers - 11 new messages in 3 topics - digest Nighthawk Motorcycle Lovers! http://groups.google.com/group/nighthawk_lovers?hl=en [email protected] Today's topics: * '84 CB650SC - rear shocks - 5 messages, 2 authors http://groups.google.com/group/nighthawk_lovers/t/9a6188f5cebb255e?hl=en * New Member! - 4 messages, 4 authors http://groups.google.com/group/nighthawk_lovers/t/538b09dc9b93abb4?hl=en * Nighthawk Ad - 2 messages, 2 authors http://groups.google.com/group/nighthawk_lovers/t/621247d6086d7210?hl=en ============================================================================ == TOPIC: '84 CB650SC - rear shocks http://groups.google.com/group/nighthawk_lovers/t/9a6188f5cebb255e?hl=en ============================================================================ == == 1 of 5 == Date: Tues, Nov 11 2008 11:03 pm From: "Gene Henry" My '84 CB650SC with 30K miles, (I got it at 22 K - $650!) and having been laid down perhaps several times by previous owner(s), has the disconcerting habit of "raising up" on the rear shocks as I dismount. That of course causes it to lean more as it raises, and it feels like it will tip over. Of course it won't, really, but it feels strange. I am assuming the rear shock(s) need attention, but because of the coil springs, nothing can be observed. Has anyone else had this problem, and if so, what was the cure? Thoughts, Dennis? anyone? Also, there is a "whine" somewhere - transmission? final drive? - most pronounced when decelerating. Any ideas here? Running Amzoil 90 in final drive, Mobil 1 synthetic in engine. I have done the carbs (plugged low speed fuel passages) new battery, new front tire, front fork leaking on one side (winter repair job). It is a "late in life (I'm 72) addition, and I love to ride it. I am constantly amazed at the good condition of 25 year old parts - especially rubber and plastic - that are still good! Honda, you did one hell of a job in designing and building! It'll outrun a $18,000 Hardly 1200+cc and a BMW ($10,000) 1300+cc. Until I chicken out (make that old injuries triumph over testosterone). Gene == 2 of 5 == Date: Wed, Nov 12 2008 6:58 pm From: Dennis Hammerl Can I ask a delicate question ? Are you a large person ? The springs are just relaxing back to the size the shock will let them go to. 30K is not a lot for the bike but Honda rear suspension is not exemplary. I am a rather light person and for the most part my rear suspension is actually a bit hard. As I don't make it work very hard, I expect it will last a long time. Your rear suspension may be sacked as the Brits say. Progressive makes great replacements, but a bit pricey. As long as you aren't causing the rear end to bottom out, I wouldn't replace them. In case you haven't noticed, the forks do the same thing when you get off. Bike suspension has not changed in it's basic concept for many moons. The spring wrapped around the shock absorber is a nice compact unit. ( on a race car they call it a "coil over") The adjuster on the bottom preloads the spring by changing its captive length. The shock controls the spring's action. Most of the shock's control happens to dampen rebound (how the unit returns to normal after being compressed) This is usually expressed as a percentage; 50-50 being the same dampening in either direction, 60-40 would be 40% compression / 60% rebound. ( I had a drag car that used 90-10 front shocks. The front would rise quickly and almost stay there causing weight transfer to the rear.) Your shocks may be bad after 30K and have poor control over the springs, hence the pop-up when you get off the bike. A cool thing to do is to stand next to your bike and grab the handlebars and pull up as hard as you can. Then smear some heavy grease on the exposed fork tubes. Go for a ride. The grease will be wiped off, up to how much of it's travel you used. At rest, the line should be somewhat above the seal that wiped it. If it sets right on it, consider that some work is in order. Sacked springs. --- On Wed, 11/12/08, Gene Henry <[EMAIL PROTECTED]> wrote: From: Gene Henry <[EMAIL PROTECTED]> Subject: [Nighthawk Lovers] '84 CB650SC - rear shocks To: [email protected] Date: Wednesday, November 12, 2008, 2:03 AM My '84 CB650SC with 30K miles, (I got it at 22 K - $650!) and having been laid down perhaps several times by previous owner(s), has the disconcerting habit of "raising up" on the rear shocks as I dismount. That of course causes it to lean more as it raises, and it feels like it will tip over. Of course it won't, really, but it feels strange. I am assuming the rear shock(s) need attention, but because of the coil springs, nothing can be observed. Has anyone else had this problem, and if so, what was the cure? Thoughts, Dennis? anyone? Also, there is a "whine" somewhere - transmission? final drive? - most pronounced when decelerating. Any ideas here? Running Amzoil 90 in final drive, Mobil 1 synthetic in engine. I have done the carbs (plugged low speed fuel passages) new battery, new front tire, front fork leaking on one side (winter repair job). It is a "late in life (I'm 72) addition, and I love to ride it. I am constantly amazed at the good condition of 25 year old parts - especially rubber and plastic - that are still good! Honda, you did one hell of a job in designing and building! It'll outrun a $18,000 Hardly 1200+cc and a BMW ($10,000) 1300+cc. Until I chicken out (make that old injuries triumph over testosterone). Gene == 3 of 5 == Date: Wed, Nov 12 2008 7:14 pm From: Dennis Hammerl All gear drives have some noise / whine to them. They have to have some clearance to work. When you roll off the throttle, you change the loading from one face of the gear to the other. Yours has worn some and has additional clearance, hence additional noise. On a rebuild of the rear gear set, that is adjustable. Pulling in the clutch should cause the noise to lessen some as you relieve the gear set of the motor drag. Both of my 700's have a whine in third gear / decelerating. Cause for alarm? Not really. I have used BG extreme pressure concentrate to quiet gear noise with good results. I use it in all my shaft drive bikes. --- On Wed, 11/12/08, Dennis Hammerl <[EMAIL PROTECTED]> wrote: From: Dennis Hammerl <[EMAIL PROTECTED]> Subject: [Nighthawk Lovers] Re: '84 CB650SC - rear shocks To: [email protected] Date: Wednesday, November 12, 2008, 9:58 PM Can I ask a delicate question ? Are you a large person ? The springs are just relaxing back to the size the shock will let them go to. 30K is not a lot for the bike but Honda rear suspension is not exemplary. I am a rather light person and for the most part my rear suspension is actually a bit hard. As I don't make it work very hard, I expect it will last a long time. Your rear suspension may be sacked as the Brits say. Progressive makes great replacements, but a bit pricey. As long as you aren't causing the rear end to bottom out, I wouldn't replace them. In case you haven't noticed, the forks do the same thing when you get off. Bike suspension has not changed in it's basic concept for many moons. The spring wrapped around the shock absorber is a nice compact unit. ( on a race car they call it a "coil over") The adjuster on the bottom preloads the spring by changing its captive length. The shock controls the spring's action. Most of the shock's control happens to dampen rebound (how the unit returns to normal after being compressed) This is usually expressed as a percentage; 50-50 being the same dampening in either direction, 60-40 would be 40% compression / 60% rebound. ( I had a drag car that used 90-10 front shocks. The front would rise quickly and almost stay there causing weight transfer to the rear.) Your shocks may be bad after 30K and have poor control over the springs, hence the pop-up when you get off the bike. A cool thing to do is to stand next to your bike and grab the handlebars and pull up as hard as you can. Then smear some heavy grease on the exposed fork tubes. Go for a ride. The grease will be wiped off, up to how much of it's travel you used. At rest, the line should be somewhat above the seal that wiped it. If it sets right on it, consider that some work is in order. Sacked springs. --- On Wed, 11/12/08, Gene Henry <[EMAIL PROTECTED]> wrote: From: Gene Henry <[EMAIL PROTECTED]> Subject: [Nighthawk Lovers] '84 CB650SC - rear shocks To: [email protected] Date: Wednesday, November 12, 2008, 2:03 AM My '84 CB650SC with 30K miles, (I got it at 22 K - $650!) and having been laid down perhaps several times by previous owner(s), has the disconcerting habit of "raising up" on the rear shocks as I dismount. That of course causes it to lean more as it raises, and it feels like it will tip over. Of course it won't, really, but it feels strange. I am assuming the rear shock(s) need attention, but because of the coil springs, nothing can be observed. Has anyone else had this problem, and if so, what was the cure? Thoughts, Dennis? anyone? Also, there is a "whine" somewhere - transmission? final drive? - most pronounced when decelerating. Any ideas here? Running Amzoil 90 in final drive, Mobil 1 synthetic in engine. I have done the carbs (plugged low speed fuel passages) new battery, new front tire, front fork leaking on one side (winter repair job). It is a "late in life (I'm 72) addition, and I love to ride it. I am constantly amazed at the good condition of 25 year old parts - especially rubber and plastic - that are still good! Honda, you did one hell of a job in designing and building! It'll outrun a $18,000 Hardly 1200+cc and a BMW ($10,000) 1300+cc. Until I chicken out (make that old injuries triumph over testosterone). Gene == 4 of 5 == Date: Thurs, Nov 13 2008 12:43 am From: "Gene Henry" 225 lbs. The disconcerting thing is the lack of uniformity. Sometimes it doesn't do it (or it does it smoothly and I don't notice it). Other times I can have all my weight off the bike and leg over the seat when it suddenly rises. How will pulling up on the handlebars affect the rear shock pistons??? Thanks! Gene ----- Original Message ----- From: Dennis Hammerl To: [email protected] Sent: Wednesday, November 12, 2008 8:58 PM Subject: [Nighthawk Lovers] Re: '84 CB650SC - rear shocks Can I ask a delicate question ? Are you a large person ? The springs are just relaxing back to the size the shock will let them go to. 30K is not a lot for the bike but Honda rear suspension is not exemplary. I am a rather light person and for the most part my rear suspension is actually a bit hard. As I don't make it work very hard, I expect it will last a long time. Your rear suspension may be sacked as the Brits say. Progressive makes great replacements, but a bit pricey. As long as you aren't causing the rear end to bottom out, I wouldn't replace them. In case you haven't noticed, the forks do the same thing when you get off. Bike suspension has not changed in it's basic concept for many moons. The spring wrapped around the shock absorber is a nice compact unit. ( on a race car they call it a "coil over") The adjuster on the bottom preloads the spring by changing its captive length. The shock controls the spring's action. Most of the shock's control happens to dampen rebound (how the unit returns to normal after being compressed) This is usually expressed as a percentage; 50-50 being the same dampening in either direction, 60-40 would be 40% compression / 60% rebound. ( I had a drag car that used 90-10 front shocks. The front would rise quickly and almost stay there causing weight transfer to the rear.) Your shocks may be bad after 30K and have poor control over the springs, hence the pop-up when you get off the bike. A cool thing to do is to stand next to your bike and grab the handlebars and pull up as hard as you can. Then smear some heavy grease on the exposed fork tubes. Go for a ride. The grease will be wiped off, up to how much of it's travel you used. At rest, the line should be somewhat above the seal that wiped it. If it sets right on it, consider that some work is in order. Sacked springs. --- On Wed, 11/12/08, Gene Henry <[EMAIL PROTECTED]> wrote: From: Gene Henry <[EMAIL PROTECTED]> Subject: [Nighthawk Lovers] '84 CB650SC - rear shocks To: [email protected] Date: Wednesday, November 12, 2008, 2:03 AM My '84 CB650SC with 30K miles, (I got it at 22 K - $650!) and having been laid down perhaps several times by previous owner(s), has the disconcerting habit of "raising up" on the rear shocks as I dismount. That of course causes it to lean more as it raises, and it feels like it will tip over. Of course it won't, really, but it feels strange. I am assuming the rear shock(s) need attention, but because of the coil springs, nothing can be observed. Has anyone else had this problem, and if so, what was the cure? Thoughts, Dennis? anyone? Also, there is a "whine" somewhere - transmission? final drive? - most pronounced when decelerating. Any ideas here? Running Amzoil 90 in final drive, Mobil 1 synthetic in engine. I have done the carbs (plugged low speed fuel passages) new battery, new front tire, front fork leaking on one side (winter repair job). It is a "late in life (I'm 72) addition, and I love to ride it. I am constantly amazed at the good condition of 25 year old parts - especially rubber and plastic - that are still good! Honda, you did one hell of a job in designing and building! It'll outrun a $18,000 Hardly 1200+cc and a BMW ($10,000) 1300+cc. Until I chicken out (make that old injuries triumph over testosterone). Gene == 5 of 5 == Date: Thurs, Nov 13 2008 12:45 am From: "Gene Henry" I'll try the BG concentrate. Thanks! Gene ----- Original Message ----- From: Dennis Hammerl To: [email protected] Sent: Wednesday, November 12, 2008 9:14 PM Subject: [Nighthawk Lovers] Re: '84 CB650SC - gear whine All gear drives have some noise / whine to them. They have to have some clearance to work. When you roll off the throttle, you change the loading from one face of the gear to the other. Yours has worn some and has additional clearance, hence additional noise. On a rebuild of the rear gear set, that is adjustable. Pulling in the clutch should cause the noise to lessen some as you relieve the gear set of the motor drag. Both of my 700's have a whine in third gear / decelerating. Cause for alarm? Not really. I have used BG extreme pressure concentrate to quiet gear noise with good results. I use it in all my shaft drive bikes. --- On Wed, 11/12/08, Dennis Hammerl <[EMAIL PROTECTED]> wrote: From: Dennis Hammerl <[EMAIL PROTECTED]> Subject: [Nighthawk Lovers] Re: '84 CB650SC - rear shocks To: [email protected] Date: Wednesday, November 12, 2008, 9:58 PM Can I ask a delicate question ? Are you a large person ? The springs are just relaxing back to the size the shock will let them go to. 30K is not a lot for the bike but Honda rear suspension is not exemplary. I am a rather light person and for the most part my rear suspension is actually a bit hard. As I don't make it work very hard, I expect it will last a long time. Your rear suspension may be sacked as the Brits say. Progressive makes great replacements, but a bit pricey. As long as you aren't causing the rear end to bottom out, I wouldn't replace them. In case you haven't noticed, the forks do the same thing when you get off. Bike suspension has not changed in it's basic concept for many moons. The spring wrapped around the shock absorber is a nice compact unit. ( on a race car they call it a "coil over") The adjuster on the bottom preloads the spring by changing its captive length. The shock controls the spring's action. Most of the shock's control happens to dampen rebound (how the unit returns to normal after being compressed) This is usually expressed as a percentage; 50-50 being the same dampening in either direction, 60-40 would be 40% compression / 60% rebound. ( I had a drag car that used 90-10 front shocks. The front would rise quickly and almost stay there causing weight transfer to the rear.) Your shocks may be bad after 30K and have poor control over the springs, hence the pop-up when you get off the bike. A cool thing to do is to stand next to your bike and grab the handlebars and pull up as hard as you can. Then smear some heavy grease on the exposed fork tubes. Go for a ride. The grease will be wiped off, up to how much of it's travel you used. At rest, the line should be somewhat above the seal that wiped it. If it sets right on it, consider that some work is in order. Sacked springs. --- On Wed, 11/12/08, Gene Henry <[EMAIL PROTECTED]> wrote: From: Gene Henry <[EMAIL PROTECTED]> Subject: [Nighthawk Lovers] '84 CB650SC - rear shocks To: [email protected] Date: Wednesday, November 12, 2008, 2:03 AM My '84 CB650SC with 30K miles, (I got it at 22 K - $650!) and having been laid down perhaps several times by previous owner(s), has the disconcerting habit of "raising up" on the rear shocks as I dismount. That of course causes it to lean more as it raises, and it feels like it will tip over. Of course it won't, really, but it feels strange. I am assuming the rear shock(s) need attention, but because of the coil springs, nothing can be observed. Has anyone else had this problem, and if so, what was the cure? Thoughts, Dennis? anyone? Also, there is a "whine" somewhere - transmission? final drive? - most pronounced when decelerating. Any ideas here? Running Amzoil 90 in final drive, Mobil 1 synthetic in engine. I have done the carbs (plugged low speed fuel passages) new battery, new front tire, front fork leaking on one side (winter repair job). It is a "late in life (I'm 72) addition, and I love to ride it. I am constantly amazed at the good condition of 25 year old parts - especially rubber and plastic - that are still good! Honda, you did one hell of a job in designing and building! It'll outrun a $18,000 Hardly 1200+cc and a BMW ($10,000) 1300+cc. Until I chicken out (make that old injuries triumph over testosterone). Gene ============================================================================ == TOPIC: New Member! http://groups.google.com/group/nighthawk_lovers/t/538b09dc9b93abb4?hl=en ============================================================================ == == 1 of 4 == Date: Wed, Nov 12 2008 3:15 pm From: Poor34 Hi All!, New to the group because I just picked up a 2000 Nighthawk 750 with only 7,200 original miles and an inch of dust and rust. The previous owner was a traveling business man who neglected her for the past 2-3 years. So I picked her up on the cheap, put a ton of work into her, and finally got her running in great shape. But now it's time to make her shine. Which leads me to my first questions... If I am going to take off the exhaust pipes at the headers are there any special tools or gaskets I should be concerned about? I went through past discussions and didn't see this topic come up yet. Thanks for the help Ryan == 2 of 4 == Date: Wed, Nov 12 2008 3:28 pm From: "Paul (Do NOT send forwards to this address)" Hey Ryan, Welcome to the group and congrats on the 750. Share a picture or two with us once you get it shined up! Paul <http://groups.google.com/group/nighthawk_lovers> Paul LeBoutillier Nighthawk Lovers Email Group Admin On Wed, Nov 12, 2008 at 4:15 PM, Poor34 <[EMAIL PROTECTED]> wrote: > > Hi All!, > > New to the group because I just picked up a 2000 Nighthawk 750 with > only 7,200 original miles and an inch of dust and rust. The previous > owner was a traveling business man who neglected her for the past 2-3 > years. So I picked her up on the cheap, put a ton of work into her, > and finally got her running in great shape. But now it's time to make > her shine. Which leads me to my first questions... > > If I am going to take off the exhaust pipes at the headers are there > any special tools or gaskets I should be concerned about? I went > through past discussions and didn't see this topic come up yet. > > > Thanks for the help > > Ryan > > > > == 3 of 4 == Date: Wed, Nov 12 2008 5:11 pm From: "Creative Residential Designs" Welcome Ryan! I am glad to hear that you put all of that effort into your bike. I didn't need any special tools when I removed the exhaust pipes off of a parts bike for my Hawk...but mine is an '83 650. It just took some elbow grease and Bob to help. Good luck! HotrodMamma ----- Original Message ----- From: "Poor34" <[EMAIL PROTECTED]> To: "Nighthawk Motorcycle Lovers!" <[email protected]> Sent: Wednesday, November 12, 2008 4:15 PM Subject: [Nighthawk Lovers] New Member! > > Hi All!, > > New to the group because I just picked up a 2000 Nighthawk 750 with > only 7,200 original miles and an inch of dust and rust. The previous > owner was a traveling business man who neglected her for the past 2-3 > years. So I picked her up on the cheap, put a ton of work into her, > and finally got her running in great shape. But now it's time to make > her shine. Which leads me to my first questions... > > If I am going to take off the exhaust pipes at the headers are there > any special tools or gaskets I should be concerned about? I went > through past discussions and didn't see this topic come up yet. > > > Thanks for the help > > Ryan > > > > == 4 of 4 == Date: Wed, Nov 12 2008 6:24 pm From: Dennis Hammerl It's always a good idea to use new sealing rings at the cylinder head when putting the exhaust back on. Barring that, you might get lucky and not have a leak using the old ones. There is a trick to putting them back on.without tearing your hair out. Takes two people to replace them. Hook the header clamps on the studs and slip a screwdriver into the rear support hole (don't use the bolt) The screwdriver will allow the assembly to move about while you tighten the header clamp nuts. Always start at the front and work back.. After you get the header clamps secured, install the rear bolts and tighten. The seal at the head is more important, start there.The sealing rings are meant to crush, some techs will turn them around to present a fresh face to the pipes flanges. I prefer to keep them in the same place, same hole. Thanks for putting a bike back in service. --- On Wed, 11/12/08, Poor34 <[EMAIL PROTECTED]> wrote: From: Poor34 <[EMAIL PROTECTED]> Subject: [Nighthawk Lovers] New Member! To: "Nighthawk Motorcycle Lovers!" <[email protected]> Date: Wednesday, November 12, 2008, 6:15 PM Hi All!, New to the group because I just picked up a 2000 Nighthawk 750 with only 7,200 original miles and an inch of dust and rust. The previous owner was a traveling business man who neglected her for the past 2-3 years. So I picked her up on the cheap, put a ton of work into her, and finally got her running in great shape. But now it's time to make her shine. Which leads me to my first questions... If I am going to take off the exhaust pipes at the headers are there any special tools or gaskets I should be concerned about? I went through past discussions and didn't see this topic come up yet. Thanks for the help Ryan ============================================================================ == TOPIC: Nighthawk Ad http://groups.google.com/group/nighthawk_lovers/t/621247d6086d7210?hl=en ============================================================================ == == 1 of 2 == Date: Wed, Nov 12 2008 3:40 pm From: "Paul (Do NOT send forwards to this address)" Wanna see an example of a REALLY bad Craigslist ad? http://boise.craigslist.org/mcy/916496632.html Paul <http://groups.google.com/group/nighthawk_lovers> Paul LeBoutillier Nighthawk Lovers Email Group Admin == 2 of 2 == Date: Wed, Nov 12 2008 5:13 pm From: "Creative Residential Designs" Blasphemer, that one...apparently does not care for his Hawk at all.... ----- Original Message ----- From: Paul (Do NOT send forwards to this address) To: Nighthawk Lovers Sent: Wednesday, November 12, 2008 4:40 PM Subject: [Nighthawk Lovers] Nighthawk Ad Wanna see an example of a REALLY bad Craigslist ad? http://boise.craigslist.org/mcy/916496632.html Paul Paul LeBoutillier Nighthawk Lovers Email Group Admin ============================================================================ == You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. 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