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1999 Honda shadow ace 750 dies when driving over 55mph


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Buglermatthew
New User

Sep 22, 2011, 6:15 PM

Post #1 of 4 (3127 views)
1999 Honda shadow ace 750 dies when driving over 55mph Sign In

I have a 1999 Honda shadow ace 750. It has 16000 miles and is in great condition, it drove it home in march over an hour on the freeway. I have not risen it much since then but every time I do it runs great around the neighborhood. Whenever I go on the highway, or over 55 mph it loses power and then dies.


Mr.scotty
Enthusiast
Mr.scotty profile image

Sep 22, 2011, 8:13 PM

Post #2 of 4 (3115 views)
Re: 1999 Honda shadow ace 750 dies when driving over 55mph Sign In

If my memory serves me right, this has twin carburetors right?
If the bike has been sitting a long time I would pull both carbs and clean and rebuild them, might want to remove the fuel tank and clean it out and replace the strainer in the petcock.
After that carb adjustments may be necessary.

PS: A valve adjustment would not hurt either while the tank is removed.
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Your only as good as your tools!


zmame
Veteran / Moderator
zmame profile image

Sep 23, 2011, 4:39 AM

Post #3 of 4 (3104 views)
Re: 1999 Honda shadow ace 750 dies when driving over 55mph Sign In

I vote partially plugged tank inlet screen, fuel filter or failing fuel pump. or possible electrical issues. You need to see what it missing when it wont start fuel or spark.. I know these carbs have very fine jets and if you let them get gummed up your screwed. You have to get it rebuilt with someone that has a ultrasonic cleaner.

Next time it stalls out try applying the choke slowly and see if it fires up if it does that indicates a lean condition (not enough fuel).


Mr.scotty
Enthusiast
Mr.scotty profile image

Sep 23, 2011, 9:32 PM

Post #4 of 4 (3094 views)
Re: 1999 Honda shadow ace 750 dies when driving over 55mph Sign In


In Reply To
I vote partially plugged tank inlet screen, fuel filter or failing fuel pump. or possible electrical issues. You need to see what it missing when it wont start fuel or spark.. I know these carbs have very fine jets and if you let them get gummed up your screwed. You have to get it rebuilt with someone that has a ultrasonic cleaner.

Next time it stalls out try applying the choke slowly and see if it fires up if it does that indicates a lean condition (not enough fuel).


Yeah, bikes with carbs dont like to sit with fuel in them for long.
Dirty carbs are probably the most common thing i have to fix on bikes, atv's,lawn mowers, ect... cause people never drain the gas out on them before storage.
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Your only as good as your tools!






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