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 <[email protected]> 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 > <[email protected]>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 <[email protected]> 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, <[email protected]> > > [email protected] < <[email protected]> > > [email protected]> 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 <[email protected]> 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, [email protected] < > >> [email protected]> wrote: > > >> > From: [email protected] <[email protected]> > >> > Subject: [Nighthawk Lovers] Re: How responsive is a 1983 750sc NH? > >> > To: "Nighthawk Motorcycle Lovers!" <<[email protected]> > >> [email protected]> > >> > 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 <[email protected]> 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, [email protected] < > >> [email protected]> wrote: > > >> > > From: [email protected] <[email protected]> > >> > > Subject: [Nighthawk Lovers] How responsive is a 1983 750sc NH? > >> > > To: "Nighthawk Motorcycle Lovers!" <<[email protected]> > >> [email protected]> > >> > > 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 [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 -~----------~----~----~----~------~----~------~--~---
