|
Jym777
|
 |
« on: November 18, 2015, 04:19:37 PM » |
|
Hay guys, would it be in one of my carbs that cause a popping sound out of one of the left cylinder at between 1000-1500 rpm in first or second gear? Really bugging me!! Any and all help much appreciated, Thanks, Jym..
|
|
|
|
|
Logged
|
|
|
|
Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
|
|
« Reply #1 on: November 19, 2015, 07:07:26 AM » |
|
Sounds like the classic case of varnished low jets. Try several tank fulls with heavy doses of fuel cleaner.
|
|
|
|
|
Logged
|
|
|
|
|
Jym777
|
|
« Reply #2 on: November 19, 2015, 10:13:51 AM » |
|
Thanks Pat, I'll try that first, easier than pulling carbs apart!!
|
|
|
|
|
Logged
|
|
|
|
salty1
Member
Posts: 2359
"Flyka"
Spokane, WA or Tucson, AZ
|
|
« Reply #3 on: November 19, 2015, 11:59:30 AM » |
|
Thanks Pat, I'll try that first, easier than pulling carbs apart!!
Jym use Chemtool B12. Use a can in a full tank. |
|
|
|
|
Logged
|
My rides: 1998 GL1500C, 2000 GL 1500CF,2006 GL 1800 3A   |
|
|
|
Bighead
|
|
« Reply #4 on: November 19, 2015, 06:03:23 PM » |
|
And ride it at very low rpms .
|
|
|
|
|
Logged
|
1997 Bumble Bee
1999 Interstate (sold)
2016 Wing
|
|
|
|
NDFRC
|
|
« Reply #5 on: November 20, 2015, 03:30:25 AM » |
|
Understand low RPMs and cleaning out slow jets, but riding a Valk at very low RPMs is definitely an oxymoron!
|
|
|
|
|
Logged
|
|
|
|
Patrick
Member
Posts: 15433
VRCC 4474
Largo Florida
|
|
« Reply #6 on: November 22, 2015, 09:58:39 AM » |
|
Understand low RPMs and cleaning out slow jets, but riding a Valk at very low RPMs is definitely an oxymoron!
LOL ! Thats just completely against basic human nature isn't it ! But, keeping the engine speed from idle to about 2500 keeps most of the fuel moving thru the low circuit. |
|
|
|
|
Logged
|
|
|
|
|
Flat6Valk
|
|
« Reply #7 on: November 23, 2015, 12:05:02 PM » |
|
Check you vacuum tube too. Even a tiny bit loose or tiny crack will cause havoc. Especially on warm days.
And check the screws holding the rubber tubes to the manifolds.
Greg
Flat6Valk
|
|
|
|
|
Logged
|
RIDE SAFE-RIDE OFTEN........GO BUCKEYES!!!
|
|
|
|
Oldnick
|
|
« Reply #8 on: November 23, 2015, 05:42:29 PM » |
|
I had a lot of popping and crackling at 1000-3000- rpm no load because of a loose tube on the rear left cyclinder that is the vacuum line to the tank. Worth checking that at both ends as well. IT can also cause fuel feed trouble
|
|
|
|
|
Logged
|
Nick
May God save us from believers!
|
|
|
|
IamGCW
|
|
« Reply #9 on: November 24, 2015, 05:58:32 AM » |
|
+1 on the intake clamps.
Could also be the start of a fuel valve leak, vacuum port cap leak, or intake O ring leak.
Gil
|
|
|
|
|
Logged
|
Gil
uıɐƃɐ ʎɐqǝ ɟɟo pɹɐoqʎǝʞ ɐ ʎnq ɹǝʌǝu ןן,ı
|
|
|
|
Jym777
|
|
« Reply #10 on: November 25, 2015, 03:22:43 PM » |
|
Thanks so much guys, good info! Much appreciated!!
|
|
|
|
|
Logged
|
|
|
|
|
Oldnick
|
|
« Reply #11 on: November 25, 2015, 10:03:06 PM » |
|
Hope I am not condescending, but start simple, with the easiest stuff to check. Many are the times I wish I had listened to that. IME, having a good look, at the plumbing under the tank generally, is not a bad idea. A lot of mine had perished at the ends, probably because of heat and vibration....and before anyone mentions the "nickel test"  , there is road vibration as well  Nick |
|
|
|
|
Logged
|
Nick
May God save us from believers!
|
|
|
|
Pappy!
|
|
« Reply #12 on: November 29, 2015, 07:36:36 AM » |
|
Also try a good old carb sync.
|
|
|
|
|
Logged
|
|
|
|
|
Jym777
|
|
« Reply #13 on: December 01, 2015, 04:49:25 PM » |
|
Cyc popping issue resolved! Thanks to all of you guys!! It was the vacuum line, I followed it from the left rear cyc and there it was unhook and just laying there, took a few minutes to figure where it went, hooked it up and no more popping! Thanks again you guys, much appreciated, Jym...
|
|
|
|
|
Logged
|
|
|
|
Steel cowboy
Member
Posts: 1284
Moving ahead so life won’t pass me by.
Spring Hill, Fl.
|
|
« Reply #14 on: December 01, 2015, 05:10:22 PM » |
|
Left rear manifold that's number 6 carb.feeds vacuum to the petcock. If your bike ran with the vacuum line disconnect I would check it. Fuel should not be passing thru the stock petcock with out vacuum.
|
|
|
|
|
Logged
|
2001 black interstate
2003 Jupiter Orange wing
|
|
|
|
