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after fire (Read 70 times)

Ageshooter77 YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 17 Green Cove Springs Fla Gender:	after fire 07/19/21 at 16:21:03 how to adjust the carburetor air screw after muffler change to prevent after fire on throttle roll back during shifting or decelerating. Just got the info I needed in the tech section I'm just learning how to use this site. Be patient.
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28760 L.A. California Gender:	Re: after fire Reply #1 - 07/19/21 at 17:21:38 1st, check the muffler and header connections for air leaks. those will cause after-fires at shift change or decel.
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Gary_in_NJ Serious Thumper Offline LS650 Cafe Racer Posts: 2625 Amongst the Twisty Roads	Re: after fire Reply #2 - 07/19/21 at 17:28:17 I agree, when ever I get roll off exhaust popping, I have a loose header pipe.
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Armen Serious Thumper Offline Half-Witted Wrench-Jockey from Jersey Posts: 1431	Re: after fire Reply #3 - 07/19/21 at 17:34:07 For me, it's always been leanness on the idle circuit. Richen the mixture screw and shim the needle.
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Tocsik

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Re: after fire
Reply #4 - 07/20/21 at 13:19:31

If you have the idle set high enough, it should minimize some of the after fire. And you can try practicing to not completely roll off the throttle when shifting. That helps, too.

And be careful checking the acorn nuts on the header pipe at the cylinder. They don't need to be tightened down hard. It's easy to cause some damage. Just a 1/4" drive socket and use only fingertips on the handle.

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Ageshooter77

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Re: after fire
Reply #5 - 07/20/21 at 17:29:17

Removed the plug by stepping up from a5/64th to a1/8th to a3/16th in drill. The plug spun out after the second turn of the last drill Very easy. Warmed up the engine well than started backing out the screw 1/2 turn at a time. The RPM peaked at two turns which is 2 3/4 total turns. Idle speed went to about 1200 rpm Adjusted that back to around 600 I guess. Throttle response is good in both directions and idle is steady after a quick rollback. Still getting some after fire on quick rollbacks. My neighbor has a Suzuki sport bike and he loves the sound. the muffler is a HD FXD from a 2009 super glide I didn't realize when I bought it on e bay that it was a Calf. muffler, The parts guy at the local HD dealer said it would be quite. Not so. good tone semi loud soft mellow throb. This is my first motorcycle I purchased 2 months ago with 380 miles on it. A 2016 s4o with many changes in 2 mos. Did I mention that I'm 86 years old.

Ageshooter77

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badwolf Serious Thumper Offline Ridin' my Lil' Bagger - 153k miles so far Posts: 793 Palm Beach County, FL Gender:	Re: after fire Reply #6 - 07/20/21 at 18:13:08 Welcome!!! Before anyone jumps up and yells at you, turn the idle back up to 1200 and NEVER let it idle on the sidestand!!!!! The oil pump is weak below 1100 or so rpm, and can not lube the cam properly. We have seen bikes come thru here with destroyed top ends at unbeliveable low mileages. Other than that,,, ride on...............
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