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Author Topic: Rough running under 2000 RPM...backfire too  (Read 1189 times)
Xtracho
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The Bosses

Florida's Emerald Coast


« on: August 19, 2013, 04:29:10 PM »

Noticed this headed to the market a little while ago. Sounds like she wants to miss a little under 2000 RPM and when I back off the throttle there's a slight backfire from the left exhaust. Wonder if the jets may be dirty or clogged. Over 2000 RPM she scats like she should. I've got a can of Seafoam working in this tank of gas and another to run through it as well.

Any ideas or advice? Thanks!
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Mark

"To live you must be willing to die" - Amir Vahedi
My father gets smarter each day he is gone.

In the stable:
'84 GW Aspencade
'47 Indian Chief
'98 Valkyrie
cashman
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Posts: 206


Goshen Indiana


« Reply #1 on: August 19, 2013, 04:37:22 PM »

try the b-12.  just went thru this and it really seemed to help.  run between 1200 and 2000 rpms to really run thru the slow jets.  you can read my carb help in Indiana thread to see how the guys worked me thru this.

leo
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Xtracho
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The Bosses

Florida's Emerald Coast


« Reply #2 on: August 19, 2013, 04:44:39 PM »

B-12? indiana thread? Can you post a link?
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Mark

"To live you must be willing to die" - Amir Vahedi
My father gets smarter each day he is gone.

In the stable:
'84 GW Aspencade
'47 Indian Chief
'98 Valkyrie
cashman
Member
*****
Posts: 206


Goshen Indiana


« Reply #3 on: August 19, 2013, 04:45:29 PM »

http://www.valkyrieforum.com/bbs/index.php/topic,58919.0.html
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Patrick
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VRCC 4474

Largo Florida


« Reply #4 on: August 20, 2013, 03:31:37 AM »

Hmmm, I take a B12 tablet every day and it picks me up. Never thought about giving one to the Valk.  Smiley


Actually, I think what you are doing with the Seafoam is a good thing. Just mix a full can with the fuel well and go ride. Try to keep the engine under 2K and force it through the low circuit. Sounds like you're catching the problem in its infancy.
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9Ball
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Posts: 2183


South Jersey


« Reply #5 on: August 20, 2013, 04:51:48 AM »

check for air leaks too...split hoses, cracked vacuum caps, loose intake boots, loose header nuts....these can all cause popping on decel.
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VRCC #6897, Joined May, 2000

1999 Standard
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2005 VTX 1300S
indybobm
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Posts: 1602

Franklin, Indiana VRCC # 5258


« Reply #6 on: August 20, 2013, 09:41:50 AM »

B-12? indiana thread? Can you post a link?


Berryman's B-12 Chemtool. Really good stuff. Available at Walmart for under $4.00 and all Autozone, Advance Auto and other parts stores.

Put 1/2 can in with a full tank and you should see good results very quickly.
I swear by it.

http://www.berrymanproducts.com/
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So many roads, so little time
VRCC # 5258
Jess from VA
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No VA


« Reply #7 on: August 20, 2013, 11:15:08 AM »

Yep, after years of using Seafoam in my 2stroke lawn tools, I switched to Berryman's and got a noticeably better, quicker result.
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cashman
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Goshen Indiana


« Reply #8 on: August 20, 2013, 03:02:33 PM »

I must say, it really impressed me.....
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BF
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Fort Walton Beach, Florida I'm a simple man, I like pretty, dark haired woman and breakfast food.


« Reply #9 on: August 20, 2013, 05:18:09 PM »

Techron.   cooldude

Your bike is sitting on it's kickstand and leaning left for a month or more at a time. 

Get a bottle from wallyworld.  Pour the whole thing in the tank.  Fill tank with regular (as much as you can pack in there).  Go for a very long ride (the entire tank full).  Keep the bike under 2000 as much as possible to clean out the slow jets.  

That is....if you can get that much ride time in between rain showers.   Grin

Come back and tell us how great it worked.   Wink
« Last Edit: August 20, 2013, 05:22:31 PM by BF » Logged

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john
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tyler texas


« Reply #10 on: August 22, 2013, 07:00:24 AM »

 " check for air leaks too...split hoses, cracked vacuum caps, loose intake boots, loose header nuts....these can all cause popping on decel."              cooldude
      fuel additives will not fix an air leak , be it intake or exhust       coolsmiley
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vrcc # 19002
WamegoRob
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Wamego, KS


« Reply #11 on: August 23, 2013, 11:50:53 AM »


Your bike is sitting on it's kickstand and leaning left for a month or more at a time. 


Maybe it's not so much a carburetion but an emotional problem...  bikes get lonely after a month in solitary  Cry



Go for a very long ride (the entire tank full).  Keep the bike under 2000 as much as possible to clean out the slow jets.  


If it's locked in the garage anyway, why not just open the garage door and let it idle until empty?

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