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08-31-2008, 8:30 AM Blindstitch2002 Joined on 05-16-2007 Greenfield Wisconsin Posts 5,000 Hard starting after riding 50 miles. Heres one from my brother who's down for a week. The bike runs pretty decent but I have to dial the idle back a bit.  When he rides the bike for over 50 miles and shuts it off the bike doesn't want to start back up. It just cranks. Then after a while backfires and comes back to life. He says if he lets it sit for 20 minutes and comes back to it that it fires right over. I experienced this with him yesterday but If I push start the bike it fires right up? Any ideas. I only have 5 days to work on this before he has to drive 300 miles back home. 1978 Honda Cx500 Maggot 1979 Honda Cx500 Custom 1980 Cx500 Deluxe Buy HTTA Items Quick Reference Info    Report

08-31-2008, 9:15 AM makenzie71 Joined on 03-30-2007 TX Posts 522 Re: Hard starting after riding 50 miles. year, make and model? My CX does this because she gets too warm and starts stressing the stator and battery and the motor starts to tighten up. Between the extra oomph needed to start the bike and the weakened battery, she just cranks slow and stops. If I wait a minute and push start her or let her sit for half an hour and push the button she fires right up. Available from EssGlass ATV/Motorcycle Fabrication ~Preload adjusters (CX5/applicable): $55 + core caps ~310mm big brake kits (CX5/applicable): starting at $125 ~Left exit divorced exhaust: $225 for info email me!    Report

08-31-2008, 9:28 AM Blindstitch2002 Joined on 05-16-2007 Greenfield Wisconsin Posts 5,000 Re: Hard starting after riding 50 miles. 1979cx500 custom. It gets a decent crank but I have always suspected the starter to be working slower than on my bike. I get about 2 engine rotations and I'm up and running but this bike seems to like to spin a lot. I know we have jumped it a lot but not after the 50 mile mark. When we jump it there seems to be enough cranking that should start it but as soon as we hook up the cables it fires over. 1978 Honda Cx500 Maggot 1979 Honda Cx500 Custom 1980 Cx500 Deluxe Buy HTTA Items Quick Reference Info    Report

09-02-2008, 5:48 PM ki4 Joined on 08-21-2008 New Port Richy, Fla Posts 239 Re: Hard starting after riding 50 miles. The back fire could mean that the carb's could be leaking into the cylinders, over wetting the cylinder plugs. cx 500 c 81 It's my Ugly and I'll ride it if I want to, ride if I want to, you would ride to if you had an Ugly to.    Report

09-02-2008, 7:18 PM Blindstitch2002 Joined on 05-16-2007 Greenfield Wisconsin Posts 5,000 Re: Hard starting after riding 50 miles. Maybe but I don't think so. I'm going to pull the plugs tomorrow and make sure they are the right color. Been running a bit better lately. Maybe it just wanted to be used. Still gets 50ish miles per gallon. Same as my bike. 1978 Honda Cx500 Maggot 1979 Honda Cx500 Custom 1980 Cx500 Deluxe Buy HTTA Items Quick Reference Info    Report

09-02-2008, 7:36 PM makenzie71 Joined on 03-30-2007 TX Posts 522 Re: Hard starting after riding 50 miles. Still sounds like a heat issue but it may be affecting other areas and causing a loss of compression...possibly getting warm and screwing with the tolerances in the head and valve train.  A dinky change in the tolerances in the jugs or the head/s can make the difference between the bike firing up and running from a 150rpm starter speed and needing a 350rpm starter speed. Have you done a compression test?  You should do one cold and hot, and remember to do them at WOT. Available from EssGlass ATV/Motorcycle Fabrication ~Preload adjusters (CX5/applicable): $55 + core caps ~310mm big brake kits (CX5/applicable): starting at $125 ~Left exit divorced exhaust: $225 for info email me!    Report

09-02-2008, 8:36 PM Blindstitch2002 Joined on 05-16-2007 Greenfield Wisconsin Posts 5,000 Re: Hard starting after riding 50 miles. Haven't done a compression test yet. I'm short the gauges and only have one or two more days to figure things out before he leaves. 1978 Honda Cx500 Maggot 1979 Honda Cx500 Custom 1980 Cx500 Deluxe Buy HTTA Items Quick Reference Info    Report

09-02-2008, 9:05 PM makenzie71 Joined on 03-30-2007 TX Posts 522 Re: Hard starting after riding 50 miles. Check the valves.  That's fast and easy to do.  You may also be able to borrow a compression tester from AutoZone/Advance/Etc...a good gauge from Advance with the 12mm adapter (you have to have the little adapter) is $40.  If you can borrow/buy a tester from the typical try hitting up an auto/motorcycle shop and ask politely and be prepared to leave something as collateral that's worth well more than a good gauge. Also make sure his fan is in one piece and that his cooling system is intact. Another big thing to look at...though I hate to suggest it because people here are soooo eager to do it...but check the stator outputs.  Before swapping to the TI ignition I was having a similar issue but it wasn't always ride-related.  Sometimes I could ride all day and not have a problem, other times I trip around the block would leav eme unable to restart. Available from EssGlass ATV/Motorcycle Fabrication ~Preload adjusters (CX5/applicable): $55 + core caps ~310mm big brake kits (CX5/applicable): starting at $125 ~Left exit divorced exhaust: $225 for info email me!    Report

09-02-2008, 9:45 PM Blindstitch2002 Joined on 05-16-2007 Greenfield Wisconsin Posts 5,000 Re: Hard starting after riding 50 miles. I'll look into the gauge. I know the fan is intact and working good because I changed out the front cover gasket 2 weeks ago and that was one of the first things I checked. I filled the coolant and ran it cap off for a while and refilled when needed. 1978 Honda Cx500 Maggot 1979 Honda Cx500 Custom 1980 Cx500 Deluxe Buy HTTA Items Quick Reference Info    Report

Honda CX500 & G... » CX500 GL500 Tra... » Technical Help ... » Re: Hard starting after riding 50 miles.

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