Question about Honda Valkyrie Interstate Motorcycles

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Honda Valkyrie Runs Rough

My 2000 Vakyrie will start normally and warm up and idle normally. After going down the road for about 5 miles at like 45mph it will start run rough. If I stop for a bit and keep it idling it clear up. Once I head down the road again for a mile or two it runs rough again.

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  • Honda Master
  • 4,514 Answers

Carb needs ajust in the jet area--let a pro du this cause if u git it tu lean engine damage can happen--the mid to high speed jets shud be lookd at--also caarb may b dirty-take air cleaner off and spray some solvent in ther--stil mite need rebuildn

Posted on Feb 13, 2014

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Posted on Jan 02, 2017

1fastbob
  • 301 Answers

SOURCE: Honda Valkyrie Interstate 1999: 25000 miles Cobra

Stock size for the slow jet is 35. Some guys put in 38's to make them less prone to getting plugged. I would say that you still have gunk in the slow jets. Also turn the pilot screws out 2 1/4turns. If the exhaust pops and you have no exhaust or vacuum leaks turn the pilot screws in 1/4 turn at a time till it goes away.

Did you change the plugs and the air filter? How about checking and or replacing the vacuum lines?

You might try a full bottle of Techron fuel system cleaner in a tank of gas. It may clear the problem up.

I had to clean the jets on my 1999 I/S twice and it's not a fun job.

Hope this helps.

Bob

Posted on Oct 14, 2009

gregorycreme
  • 4 Answers

SOURCE: Honda Valkyrie runs rough

Your carburetors have varnished fuel in them and need cleaning. You most likely have clogged slow and fast jets. The fouled plugs pretty much say it all with this regard.

Posted on Feb 23, 2013

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Honda Valkyrie runs rough


Your carburetors have varnished fuel in them and need cleaning. You most likely have clogged slow and fast jets. The fouled plugs pretty much say it all with this regard.

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Locate you computer (right front kick panel) and tap on it with a pen while the car idles... Also flex it back and forth with your hands to see if the car runs rough or quits... You may need a new one.

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