[hirvy]

My friend has a 04 Honda Shadow 750 Spirit. I rode it to work today just as a change of pace from my SV and to see if I experienced the problem he says he's having.

Basically after riding for 15 or so minutes at 70-80 mph the bike just cuts out and dies. While driving I downshift and pull in the clutch to basically pop the clutch and get it going again and it dies after some sputtering for a bit. I didn't experience the problem when going roughly 60 mph. Any ideas? Him and I are willing to check just about anything. He's had it at the mechanic's and what he thought the problem was didn't fix it. We were all basically thinking gummed up carbs, ignition probs or screwy valves.

Oh and I'm waiting on a Honda Shadow forum to let me post to ask them too.

 

[tcl]

Check the side stand safety switch and the side stand springs (if it bounces down a bit on a bump, it will cut the engine).

 

[07sv6fiddy]

I have heard the 750's are prone to some internal engine problems, locking up engines. Cant remember what exactly the problem was though. Also check the plugs. My neighbors vstar 1300 was doing the same thing. Set of plugs fixed it.

 

[hirvy]

I'll check that. Only problem with that idea is we live down a really bumpy dirt road and it doesn't do it there.

 

[hirvy]

I'm pretty sure the mechanic just replaced those but I'll ask him when I get home from work.

 

[07sv6fiddy]

Make sure he replaced both, lol. It sounds stupid, but the dealer towed my neighbors bike to the shop, replaced one spark plug and gave it back. Needless to say, 3 days later they had to come and get it again, just to replaced the other plug.

 

[andyauger]

Sounds like a fuel delivery problem. Make sure the system is clean and the hoses are good. I think it has a sock filter like the SV, not sure though.

 

[tcl]

Sounds like a fuel delivery problem. Make sure the system is clean and the hoses are good. I think it has a sock filter like the SV, not sure though.

Sure does.

In addition to the above, you might want to add something to the tnk that would address the possibility f there being water in it. "HEAT" is one name brand that will accomplish this a well as anything else form the auto store that claims to "thaw" fuel lines. 95% isopropanol from the drug store should do the same thing too.

 

[doxiedog]

Fuel cap vent working?

 

[hirvy]

Fuel tank vent is clean and can be blown thru. He's been putting 91 octane in every time and ran some fuel treatment and it was still cutting out. Both plugs and wires were changed by the mechanic. It cuts out almost like it doesn't fire or misfire. When it happens if I let it totally die out while rolling and pop the clutch it fires right up usually. I did notice today that it's leaking gas if the selector is left open but thats a new thing since Sunday when he rode it. The problem started last summer around August.

 

[hirvy]

Just thought of something. It's a CA model with Cobra pipes. I'm not sure if the carbs are jetted or not. If they aren't could that be part of the problem? It only seems to happen 75+ mph.