There shouldn't be gas flowing through the petcock without the engine running, Unless you apply a vacuum to it. If that diaphragm isn't behaving that could also cause problems.
-Kyle On Fri, Aug 13, 2010 at 12:05 PM, Dapper Dan <dapperd...@gmail.com> wrote: > the weird thing is it does not happen when petcock is on reserve but when i > removed little hose line from petcock to carb, gas still runs thru petcock > on both reserve and regular. i am perplexed.still a petcock issue? > > thanx > dan > > On Fri, Aug 13, 2010 at 3:07 AM, < > nighthawk_lovers+nore...@googlegroups.com<nighthawk_lovers%2bnore...@googlegroups.com> > > wrote: > >> Today's Topic Summary >> >> Group: http://groups.google.com/group/nighthawk_lovers/topics >> >> - Maintenance questions about my '82 Nighthawk >> 650<#12a72134f5e26528_12a6aeb43be2de74_group_thread_0>[3 Updates] >> - sluggish an acceleration.stops suddenly? input from you >> guys?<#12a72134f5e26528_12a6aeb43be2de74_group_thread_1>[6 Updates] >> - 1984 Nighthawk 700 S red and black part out listing from my other >> thread <#12a72134f5e26528_12a6aeb43be2de74_group_thread_2> [1 Update] >> - New(est) owner of a project Nighthawk 700 S >> (cb700sc)<#12a72134f5e26528_12a6aeb43be2de74_group_thread_3>[2 Updates] >> - Little Light >> Maintenance<#12a72134f5e26528_12a6aeb43be2de74_group_thread_4>[1 Update] >> >> Topic: Maintenance questions about my '82 Nighthawk >> 650<http://groups.google.com/group/nighthawk_lovers/t/553e21ecf336514> >> >> Timothy Stark <tstark1...@gmail.com> Aug 12 11:55AM -0400 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> Hey if anyone is interested, next June there is a big bike show and >> cruise >> in Pickens, SC that I think it would be awesome to flood all the >> Harley >> riders with a big Honda/ Nighthawk group (just in case you want to >> ride the >> wing instead.) >> >> On Thu, Aug 12, 2010 at 11:23 AM, greenzer...@gmail.com < >> >> >> >> >> "greenzer...@gmail.com" <greenzer...@gmail.com> Aug 12 10:14AM -0700 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> If i can get the $$ and time off work, il be there.... I love that >> stuff..... >> >> -----Original Message----- >> Date: Thursday, August 12, 2010 12:10:54 pm >> To: nighthawk_lovers@googlegroups.com >> From: "Timothy Stark" <tstark1...@gmail.com> >> Subject: Re: [Nighthawk Lovers] Maintenance questions about my '82 >> Nighthawk 650 >> >> Hey if anyone is interested, next June there is a big bike show and >> cruise >> in Pickens, SC that I think it would be awesome to flood all the >> Harley >> riders with a big Honda/ Nighthawk group (just in case you want to >> ride the >> wing instead.) >> >> On Thu, Aug 12, 2010 at 11:23 AM, greenzer...@gmail.com < >> >> >> >> >> surfswab <surfs...@gmail.com> Aug 12 11:53PM -0700 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> Back to the subject that was at hand before your thread was so rudely >> highjacked: >> >> Don't know if this will be of value to you, or if you can wait long >> enuf. There's a guy who restores 70s vintage naked Goldwings and also >> supplies parts for inline 4s. One of his vendor buddies has come up >> with a mod that adapts late model spin-on filters in place of the 80s >> model cannisters. It's a quality piece of tooled aluminum for about >> $60. >> >> http://www.randakks.com/ >> >> The website is closed to orders at the moment, since the owner's on >> vacation. But he says he'll back and open for business on the 18th. >> >> As far as battery chargers, I have the Battery Tender Plus, which is a >> "smart" charger that "reads" exactly how much and what quality charge >> to apply to a battery. It's foolproof and works like a charm. >> >> >> >> Topic: sluggish an acceleration.stops suddenly? input from you >> guys?<http://groups.google.com/group/nighthawk_lovers/t/b3a2d5d573ce83ed> >> >> dapperdan7 <dapperd...@gmail.com> Aug 12 09:38AM -0700 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> it shuts off randomly when i am riding it. i noticed when i flip the >> petcock to reserve it starts right up. i checked the plugs they are >> fine.it hesitates on accelerates at times also. >> >> >> >> >> >> Chris Besignano <chrisbesign...@gmail.com> Aug 12 12:53PM -0400 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> Try riding it on reserve, only reserve to see if you experience the >> same >> issue. If it runs fine then it sounds like you are starving the carbs >> due to >> a blocked petcock tube. Take the petcock out and blow are thru it, >> maybe get >> a rebuild kit for it while you have it apart. >> >> >> >> >> >> Kyle Munz <kyle...@gmail.com> Aug 12 12:11PM -0500 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> That would be my advice too. I have pictures from when I tore down my >> petcock on my site. >> http://munz.kicks-ass.net/nighthawk/?p=151 >> >> -Kyle >> >> >> On Thu, Aug 12, 2010 at 11:53 AM, Chris Besignano >> >> >> >> >> "greenzer...@gmail.com" <greenzer...@gmail.com> Aug 12 11:18AM -0700 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> Clean the petcock >> >> >> -----Original Message----- >> Date: Thursday, August 12, 2010 12:38:24 pm >> To: "Nighthawk Motorcycle Lovers!" <nighthawk_lovers@googlegroups.com> >> From: "dapperdan7" <dapperd...@gmail.com> >> Subject: [Nighthawk Lovers] Re: sluggish an acceleration.stops >> suddenly? input from you guys? >> >> it shuts off randomly when i am riding it. i noticed when i flip the >> petcock to reserve it starts right up. i checked the plugs they are >> fine.it hesitates on accelerates at times also. >> >> >> -- >> 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<nighthawk_lovers%2bunsubscr...@googlegroups.com> >> . >> For more options, visit this group at >> http://groups.google.com/group/nighthawk_lovers?hl=en. >> >> >> >> >> Allen Thomas <althomas...@gmail.com> Aug 12 05:13PM -0400 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> Ok, I'm going to take a stab at describing what my bike was like stock >> as it >> may help. Mine stock when cold would require riding with the choke on >> for >> roughtly 5 minutes, or at idle for minimum 15 minutes. Otherwise it >> would >> stumble on accelleration, if it was really cold outside <50 degrees F >> I >> might not take it off the choke at all. If it was cold I could not >> twist the >> throttle quickly or it would shut off. Could it just be that the >> engine is >> not warm enough? Also I had an inline fuel filter for a while that was >> pinching the fuel line. I didn't pinch it enough to cause any issues >> until I >> attempted extended highway riding, it would just run out of gas and >> shut >> down. When I pulled over the float bowls would fill up and away I'd go >> until >> it shut down again. so check you're fuel line for sharp bends, the >> stock one >> is molded and a PO could have replaced it with a straight line that >> restricts flow. Lastly if your bike is really rich it could shut off >> when >> you come to a stop, or hesitate when you start off from a stop. A rich >> running engine just feels like it looses power as the engine warms up, >> or on >> a hot day. A lean engine will stumble on acceleration. Hope that helps >> somewhat, the only thing else I could add would be some sort of an >> electrical issue like on the key switch, the kill switch, bad ground >> on the >> engine, something that is affected by vibration which fixes its self >> when >> you come to a stop. >> >> >> >> >> >> hall...@luckymail.com Aug 13 12:23AM -0400 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> I had this problem on my 550. My brother took the cdi box apart and >> did some re soldering and sealed it back up and I'v had no problems now. >> >> rodhall >> >> >> >> >> >> >> -----Original Message----- >> From: Allen Thomas <althomas...@gmail.com> >> To: nighthawk_lovers@googlegroups.com >> Sent: Thu, Aug 12, 2010 4:13 pm >> Subject: Re: [Nighthawk Lovers] Re: sluggish an acceleration.stops >> suddenly? input from you guys? >> >> >> Ok, I'm going to take a stab at describing what my bike was like stock >> as it may help. Mine stock when cold would require riding with the choke >> on >> for roughtly 5 minutes, or at idle for minimum 15 minutes. Otherwise it >> would stumble on accelleration, if it was really cold outside <50 degrees >> F >> I might not take it off the choke at all. If it was cold I could not twist >> the throttle quickly or it would shut off. Could it just be that the >> engine >> is not warm enough? Also I had an inline fuel filter for a while that was >> pinching the fuel line. I didn't pinch it enough to cause any issues >> until I >> attempted extended highway riding, it would just run out of gas and shut >> down. When I pulled over the float bowls would fill up and away I'd go >> until >> it shut down again. so check you're fuel line for sharp bends, the stock >> one >> is molded and a PO could have replaced it with a straight line that >> restricts flow. Lastly if your bike is really rich it could shut off when >> you come to a stop, or hesitate when you start off from a stop. A rich >> running engine just feels like it looses power as the engine warms up, or >> on >> a hot day. A lean engine will stumble on acceleration. Hope that helps >> somewhat, the only thing else I could add would be some sort of an >> electrical issue like on the key switch, the kill switch, bad ground on >> the >> engine, something that is affected by vibration which fixes its self when >> you come to a stop. >> >> >> On Thu, Aug 12, 2010 at 12:38 PM, dapperdan7 <dapperd...@gmail.com> >> wrote: >> >> it shuts off randomly when i am riding it. i noticed when i flip the >> petcock to reserve it starts right up. i checked the plugs they are >> fine.it hesitates on accelerates at times also. >> >> >> > >http://groups.google.com/group/nighthawk_lovers?hl=en. >> >> > -- >> > Sent from my mobile device >> >> >> -- >> >> >> 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<nighthawk_lovers%2bunsubscr...@googlegroups.com> >> . >> For more options, visit this group at >> http://groups.google.com/group/nighthawk_lovers?hl=en. >> >> >> >> >> >> -- >> 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<nighthawk_lovers%2bunsubscr...@googlegroups.com> >> . >> For more options, visit this group at >> http://groups.google.com/group/nighthawk_lovers?hl=en. >> >> >> >> Topic: 1984 Nighthawk 700 S red and black part out listing from my >> other >> thread<http://groups.google.com/group/nighthawk_lovers/t/cd22eb564147bc74> >> >> Tony Quinones <tnt95...@gmail.com> Aug 12 07:37PM -0700 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> I think I might be interested in your rear drive assembly if you still >> have >> it? >> >> >> -- >> Best Wishes,TonyQ >> >> >> >> Topic: New(est) owner of a project Nighthawk 700 S >> (cb700sc)<http://groups.google.com/group/nighthawk_lovers/t/2db711d505457fe8> >> >> "greenzer...@gmail.com" <greenzer...@gmail.com> Aug 12 10:18AM -0700 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> I .have a guy that can work on your started chain... Less money then a >> new bike.... >> -----Original Message----- >> Date: Thursday, August 12, 2010 12:24:55 pm >> To: "Nighthawk Motorcycle Lovers!" <nighthawk_lovers@googlegroups.com> >> From: "J. Love" <jmlov...@gmail.com> >> Subject: [Nighthawk Lovers] Re: New(est) owner of a project Nighthawk >> 700 S (cb700sc) >> >> Unfortunately in the course of preparing the bike for daily driving >> use, my starter chain has broken. This requires the tearing down of >> the engine, so this project has ended too soon. >> >> I am parting the bike out in total. There are alot of good deals to be >> had, since I am checking ebay and generally asking half of what the >> ebay market price is. Thanks you all for the warm welcome! >> >> >> -- >> 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<nighthawk_lovers%2bunsubscr...@googlegroups.com> >> . >> For more options, visit this group at >> http://groups.google.com/group/nighthawk_lover >> >> >> >> >> Allen Thomas <althomas...@gmail.com> Aug 12 05:16PM -0400 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> Thats a real bummer, look for another one and use this one for parts. >> >> >> >> >> Topic: Little Light >> Maintenance<http://groups.google.com/group/nighthawk_lovers/t/71ea969b247fc9c9> >> >> Timothy Stark <tstark1...@gmail.com> Aug 12 09:18AM -0400 >> ^<#12a72134f5e26528_12a6aeb43be2de74_digest_top> >> >> That sounds like my kind of fun! The kind of fun that I don't wish >> upon >> anybody though. >> >> >> >> >> -- >> 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_lov...@googlegroups.com. >> To unsubscribe from this group, send email to >> nighthawk_lovers+unsubscr...@googlegroups.com<nighthawk_lovers%2bunsubscr...@googlegroups.com> >> . >> For more options, visit this group at >> http://groups.google.com/group/nighthawk_lovers?hl=en. >> > > -- > 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_lov...@googlegroups.com. > To unsubscribe from this group, send email to > nighthawk_lovers+unsubscr...@googlegroups.com<nighthawk_lovers%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/nighthawk_lovers?hl=en. > -- 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_lov...@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.
