My only encouragement is that you not give up! The 750s are classics and once you uncover the reason for the dogging at higher RPMs you'll be glad you did. Besides, we're all reading these updates and benefiting from your investigation. :) Hang in there!
Paul On Sat, May 16, 2009 at 7:09 PM, infinitelyevo...@gmail.com < infinitelyevo...@gmail.com> wrote: > > OK, I just got back from my ride and it still lacks power... 1 gear > takes off... good acceleration, 2nd and 3rd is good as well, but when > I get to around 4000 RPM's in 4th it loses umph, and 5th is worse > around the the same RPM's up to around 5700. I know it's running rich > cause I went 146 km (91 miles) and had to kick over to reserve. I > tried manually adjusting the cam chain tensioner. I noticed nothing > and honestly I am clueless. When the bike cools down I am going to > check the plugs for carbon build up... Does anyone have any more > suggestions? I let the previous owner ride it and he confirmed that it > lacked power.... A bit disappointed at the moment. > > On May 16, 1:11 pm, Kyle Munz <kyle...@gmail.com> wrote: > > No fuss raised on my part, I was just curious. They made a CX500T back in > > the day that was one of the very few factory turbocharged bikes, that > would > > definitely hang with faster bikes. I believe it was fuel injected rather > > than carbureted tho, and had a plastic fairing and TURBO logos all over > it. > > I've had several turbo cars and really miss that whine, I'd love one of > > those turbo bikes but at this point I'd probably get in trouble for > having > > another bike in the garage. I need a bigger garage ;) > > > > -Kyle > > > > On Sat, May 16, 2009 at 11:44 AM, Biz Account < > infinitelyevo...@gmail.com>wrote: > > > > > > > > > Honestly Kyle I don't know... I picked it up for 300 back in college > and > > > was just happy to have the bike... When I got it.. It was in rough > shape and > > > waterpump housing broke about a week later. Fixed it with my uncle at > his > > > shop. It wasn't until I moved with that roommate that it reached it's > full > > > potential.. The first week I was there he took apart my bike. He was > the > > > type of person who took everything apart and made it better. He was > super > > > excited to see the bike and called it one of a kind. He taught me a ton > > > about bikes and lots of other things. The neighbor across the street > was a > > > machinist and my roommate had him make parts. We jetted the carbs, but > he > > > did it a totally different way compared to the kits I see now days... I > am > > > not sure what to tell everyone.... I was there and it performed > excellent > > > and impressively.... I am sorry my statement raised such a fuss with > > > everyone on the performance part. My sincere apologies > > > > > Sent from my iPhone > > > > > On 16-May-09, at 9:17 AM, Kyle Munz <kyle...@gmail.com> wrote: > > > > > This CX500 wouldn't happen to have a "T" after the model numbers would > it? > > > > > -Kyle > > > > > On Sat, May 16, 2009 at 4:48 AM, <infinitelyevo...@gmail.com> > > > infinitelyevo...@gmail.com < <infinitelyevo...@gmail.com> > > > infinitelyevo...@gmail.com> wrote: > > > > >> The pipes are all hot and I found carbon on the first spark plug, but > > >> not the other three. Cleaned with wire brush and regapped... gapped > > >> them all to .65 and it seemed to have less of an issue misfiring, but > > >> not before the changing the oil with some nicer stuff. I made a rookie > > >> mistake in trusting previous owner when said changed the oil. The oil > > >> was thick and blackest I have ever seen. Was going to give it a good > > >> ride later today and see if my bike had improved performance. If not I > > >> was going to check the ignition timing. The sound I am getting for > > >> lack of anything better to compare it to is walking up a couple wood > > >> stairs, but it's not consistent and you have to listen for it a bit. > > >> As far as the CX500 thing.... All I can say is when I got it.... it > > >> was gutless, but after my roommate and I mostly him got done.... It > > >> was agile, quick, and I never had issues staying on his tail. Thanks > > >> for all your help so far.... It helped me a great deal on friday when > > >> I was ripping things apart checking things. > > > > >> On May 15, 10:56 pm, Dennis Hammerl <blues...@yahoo.com> wrote: > > >> > Yes on the HOT to the touch deal. Now if YOU did the carb clean, did > you > > >> remove and clean under those black rubber plugs ? Seems like most > people > > >> miss those. The mechanical advancer is on the end of the crankshaft. > They > > >> can stick in a closed position and not advance properly. Just > something to > > >> check on. The "pop" thing is a too lean condition. > > >> > A CX500 that runs with a CBR600 ? NOx wouldn't do that. That's one > story > > >> I can't swallow. For as much as some may think I love Honda's, I have > only a > > >> short list of great ones and the CX doesn't make it. Their only saving > grace > > >> is longevity. I've seen them with over 80k and still running. > > > > >> > --- On Fri, 5/15/09, infinitelyevo...@gmail.com < > > >> infinitelyevo...@gmail.com> wrote: > > > > >> > From: infinitelyevo...@gmail.com <infinitelyevo...@gmail.com> > > >> > Subject: [Nighthawk Lovers] Re: How responsive is a 1983 750sc NH? > > >> > To: "Nighthawk Motorcycle Lovers!" << > nighthawk_lovers@googlegroups.com> > > >> nighthawk_lovers@googlegroups.com> > > >> > Date: Friday, May 15, 2009, 1:16 AM > > > > >> > 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> > > >> 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- Hide quoted text - > > > > >> > - Show quoted text -- Hide quoted text - > > > > - Show quoted text - > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
