Check head bearings by putting the bike on the center stand and get somebody to hold the back down. With the front wheel off the ground, slowly move the bars from right lock to left using just a finger. They should go from side to side smoothly. A bad bearing will show as a 'notch" (usually around center) Have that condition ? time to replace. I recommend having a shop do it. Too easy to crack a bearing race without the proper tools. Cost ? Expensive but it is a rather long procedure requiring the fork to be removed. Since you didn't say it happened any other time but passing the truck, they might be fine and you had a one-time turbulence nightmare. Check anyway. Chain maintenennce is general information and anybody with a chain drive bike needs to perform it regularly. With the bike on the center stand, rotate the back wheel and watch the upper run of the chain. It should not move up and down as the wheel is turned, nor should there be anywhere in the rotation a spot where the wheel gets tight. Lube and adjust. You mention fork seals. Are yours leaking ? # I'm amazed at the number of people who ride without correct tire pressures, rusty chains, and generally poorly maintained bikes. Worn tires too.
--- On Sat, 7/4/09, Music and Nighthawk Nut <[email protected]> wrote: From: Music and Nighthawk Nut <[email protected]> Subject: [Nighthawk Lovers] Re: Trade my 85 450 for a 82 650?? To: "Nighthawk Motorcycle Lovers!" <[email protected]> Date: Saturday, July 4, 2009, 7:15 AM Good Morning, I have been thinking about not trading after looking and thinking about my 450, and your advice has played a big part;-) Ok to the questions, no I haven't a windshield or anything extra on the bike, yet. Where are the bearings located and how to I check chain tension?? I am waiting on my manual to come in. if the fork seals need to be changed, will that make it shake?? Thank you for your time and advice!! On Jul 3, 1:21 pm, Dennis Hammerl <[email protected]> wrote: > A head shake is actually quite easy to diagnose and repair. > First off, I feel bad for you about all the expense. I think you'll find out > what REAL expense is if you do the 650 deal. > Now, the head shake; do you have a windshield ? At 75, passing a large truck, > that would be a major cause. Bad head bearings show up mostly at lower speeds > (50~55) . Still, check for bad head bearings, tire pressures, AND, chain > tension. A chain with a tight spot will cause a head shake. > # a word about windshields; ever see a stop sign shaking in a high wind ? It > loads and then pivots on it's axis and unloads one side, repeat , repeat, > repeat. The windshield loads and then pivots the fork and unloads one side. > The larger the shield, it gets worse. > ## on a complaint about head shake, AHM directs that all accessories be > removed before diagnosis. (see above) [ yes, we will strip a Wing to only > original components] > # improperly maintained chains that have a tight spot really shake a front > end ? Oh yeah. A chain drive is constantly pulling the back wheel to the left > side and that twists the wheel to point right. Every time a tight spot yanks > on the rear wheel, the tail wags the dog. > "Wait for an older year" ?? NO, just an '83~'85 650. Later 750's maybe. I > have two 700's > > --- On Fri, 7/3/09, Music and Nighthawk Nut <[email protected]> wrote: > > From: Music and Nighthawk Nut <[email protected]> > Subject: [Nighthawk Lovers] Re: Trade my 85 450 for a 82 650?? > To: "Nighthawk Motorcycle Lovers!" <[email protected]> > Date: Friday, July 3, 2009, 10:33 AM > > Thankx Dennis for replying back:-) It would be a step up for me. I > will be able to find more parts for it if need be. The only reason I > am selling/trading it is because the other day when I got up to 75 to > go around a semi, the front end started shaking REALLY bad and I can't > find out why other than a fork problem and from what a Honda tech told > me would be expensive. He has worked on my 450 since I bought it last > year non-running and have spent $2100 on just work. I have done some > of the work, but needed help so... I am meeting the guy with the 650 > Sun cause he is taking it to a bike shop to have it looked over and > get the tank creamed before he lets me see it. I will definitely hear > for the valve noise. So maybe wait huh for a older year?? > > On Jul 2, 9:00 pm, Dennis Hammerl <[email protected]> wrote: > > > > > IMHO; I had a '82 CB650sc. A nice bike... just nice. no hydraulic valve > > adjusters, five speed (not six) chain drive (not drive shaft) two valve / > > single cam, cable operated clutch, just the last (best) of a run of > > pedestrian four cylinder 650 bikes that started in'79. As a Honda > > technician, I can say they had very few problems. There is one however, > > they tend to wear the head cover and make valve noise. it can be cured with > > a procedure that is somewhat costly. If it makes valve noise, I'd pass. > > Don't get me wrong, I liked mine. Is it a step up for you ? Yes, but it's > > only about half of what the '83~'85 bikes were. 21K is quite a bit for one > > of those. Mine had about 8K on it when I sold it for $1100 back in '87. > > Me ? I'd wait for a good '85. > > > --- On Thu, 7/2/09, Music and Nighthawk Nut <[email protected]> wrote: > > > From: Music and Nighthawk Nut <[email protected]> > > Subject: [Nighthawk Lovers] Trade my 85 450 for a 82 650?? > > To: "Nighthawk Motorcycle Lovers!" <[email protected]> > > Date: Thursday, July 2, 2009, 11:33 PM > > > I have an offer on my 85 450 Nighthawk for an 82 650 Nighthawk. The > > 650 has 21000mi and just "needs the seat recovered" and possibly the > > master cylinder. My 450 needs another carb rebuild since the 1st guy > > didn't do it right the the gas tank creamed. It has 10685mi on it. > > Would it be a good trade since I do want a bigger bike?? --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
