Question about Honda F6 C Valkyrie Motorcycles

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98 Valkyrie running on 3 cyls

Was running great all of a sudden starting running rough, checked exhaust pipe at header #2 on rt side sprayed water on it stayed there 1 and 3 evaporated on left side # 2 and 3 water stayed on longer , could it be coils #1 on left also ok

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  • Honda Master
  • 3,799 Answers

Coils on multi-cylinder bikes usually have one coil for 2 cylinders.

Posted on Apr 25, 2013

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

Benimur
  • 6966 Answers

SOURCE: 1979 suski 750,bike runs on 2 left side cylinders,

Hi and welcome to FixYa,

With the indulgence of craigjamesbt...

A few additional ideas to consider:

  • it would be an electrical/ignition issue if 1 & 4 or 2 & 3 will not fire but not 3 & 4;
  • almost always, raw fuel on exhaust indicates a flooded engine. A flooded engine would most likely be a carb issue;
  • best way to determine if it is an engine concern is to do a compression test;
  • a way to test the right carb pair is to deliberately starve them of fuel by temporarily plugging/blocking the inlet port/seat with rubber similar in appearance as to those used for glue gun, not installing the needle and float. Assemble the carb and install. Start the bike and use/spray carb cleaner on the right side carb. Note if 3 & 4 will fire even intermittently.
Would appreciate a postback on results/updates on any developments.

Good luck and thank you for using FixYa.

Posted on Apr 27, 2009

ollie reece
  • 1167 Answers

SOURCE: ktm sxf 450 08, misfire at 3/4 revs and above,

ok buddy on carb will be a screw try fiddle with this mixture screw on carb below get back to me with results 797ccb7.jpg

Posted on Oct 11, 2009

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

REDOIL
  • 355 Answers

SOURCE: valkyrie has a pop in the exhaust at idle..on #1

well i would start buy checking for vacumm leak at carbs and at exhaust system can do this to most check all rubber seal for cracks and things like that hope this helps

Posted on Feb 08, 2010

  • 653 Answers

SOURCE: exhaust pipe comes out white smoke when start bike on side stand

Continuous or just for the 5-10 seconds.
If continuous you may have oil seeping past your pistons oil rings or valve guides oil seals.
Check your spark plug see if they are fouled badly (covered heavily and oily) or just covered by oil and sooth lightly.
If 5-10 sec it is normal as the engine is heating up there are normally a little oil seeping past the seals.

Posted on Apr 10, 2010

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