I will give you as much info as I can. I cleaned one carb at a time. I took it for a long ride opened it up a bit and tryying to clear out anything remaining. It was a bit quicker towards the end of the ride. It seemed to be a lot quicker after higher RPM's. Once it got over that hump... it started moving quite a bit faster. The exhaust was a bit "poppy" for lack of better word when I would roll on aggressively. I haven't checked the cylinders yet. Was hoping not to have to dive in so early in the season. I have heard that if I touch the pipes on the manifold and they are not all hot, I have a cylinder issue... Is this true? I am not sure what an advancer is so if I can get more of an explanation of this, I would appreciate it. I will also check the venting tubes and make sure there in the right direction. In all fairness about the CX500. My roommate and I tuned it to keep up with his 93 cbr 600 f3. Anyways... I very much appreciate the wisdom as I am new to the Nighthawks and can use all the help I can get.
On May 14, 9:36 pm, Dennis Hammerl <blues...@yahoo.com> wrote: > On such a small amount of info, I can only speculate a few things. First off, > I can't verify the quality of work done by any other source. That bike has a > mechanical advance. I'd Check to make sure it is functional. Your symptoms > sound like an advancer that is stuck. Another item is the accelerator pump. > When you did the carbs, did you do all at once or one at a time ? From your > riding position, all vacuum caps should face you ( the printing readable, not > upside down) Getting those wrong will cause throttle response problems. To > compare it to a CX500 is a travesty. A CB750C should be able to tow one of > those faster than it could go on it's own. One final question, does it even > run on all four ? (hint; you can sync carbs on a bike that has dead > cylinders) A two cylinder 750 would run worse than a CX500. > Check for all four, get a timing light and check for advance, look for > discharge from accelerator pump. Most techs at dealerships today have little > / no experiance with elderly Honda's. Most weren't born when those bikes were > new. > > --- On Thu, 5/14/09, infinitelyevo...@gmail.com <infinitelyevo...@gmail.com> > wrote: > > From: infinitelyevo...@gmail.com <infinitelyevo...@gmail.com> > Subject: [Nighthawk Lovers] How responsive is a 1983 750sc NH? > To: "Nighthawk Motorcycle Lovers!" <nighthawk_lovers@googlegroups.com> > Date: Thursday, May 14, 2009, 8:35 AM > > Long story short... I bought my NH about 2 months ago from a guy who > didn't winterize it. It was such a deal for here in Alberta I bought > it. I cleaned the carbs and had them professionally tuned. I recharged > th K&N and replaced the plugs. When I got it up a running and took it > for a test drive it seemed to lack umph after everything was done.... > Since I didn't have it to ride before I bought it. I have nothing to > compare it to, but my 1982 CX500 which was super responsive and quick > off the line. My NH seems to just want to smoothly increase no matter > how much I roll on the throttle. Any thoughts on how to improve > throttle response time? Any help would be greatly appreciated, thanks > > Joel --~--~---------~--~----~------------~-------~--~----~ 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_lovers@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 -~----------~----~----~----~------~----~------~--~---
