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06-30-2014, 07:14 AM,
#1
gasket prob 03 / 650
I have replaced upper silencer gasket twice still getting blow by. What am i doing wrong seems simple enough? Angry
Insanity doing the same thing expecting different results. Undecided
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06-30-2014, 07:17 AM,
#2
RE: gasket prob 03 / 650
Is it on the front cylinder or the back cylinder?
Never tell someone more than they are willing to hear.
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06-30-2014, 08:13 AM,
#3
RE: gasket prob 03 / 650
back cylinder at muffler not head
Insanity doing the same thing expecting different results. Undecided
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06-30-2014, 08:42 AM, (This post was last modified: 06-30-2014, 08:45 AM by commonground.)
#4
RE: gasket prob 03 / 650
I think that you are referring to Item 4 in the attached diagram. When you install a new gasket it is vital that you ensure that both flange surfaces are clean and not cracked or pitted. Loosen up enough of the exhaust system to make sure that the gasket flanges are parallel so that you get a good even crush on the gasket. Proper torque is important to ensure a good seal. Tighten the bolts alternately instead of one at a time. Ensure that all the other exhaust mounting hardware is reinstalled so that the whole system has proper support. Good luck. BTW Ensure that you have the proper gasket also.

   
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06-30-2014, 09:39 AM,
#5
RE: gasket prob 03 / 650
nope # 10
Insanity doing the same thing expecting different results. Undecided
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06-30-2014, 09:47 AM,
#6
RE: gasket prob 03 / 650
Clean off any carbon from the metal surfaces with a wire brush. Install the gasket, tighten the clamp snug but not so tight that it threatens to deform the tube. Other than that, pretty much everything Augie said.

Also, make sure it is actually leaking at the gasket and not at one of the internal welds. The bike is 11 years old and it's entirely possible that there is a hairline crack in the assembly
===========================
2011 V-Star 650 Custom (new in fall 2013)
V&H Cruzer Pipes, Memphis Shades Bat Wing, Floorboards, Highway Bars,
Locking Bags, Tail Rack, LED Signals & Aux Brake Lights, Headlight Modulator,
Brake Light Modulator, 5/8" Gel Pad Under Upholstery.
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06-30-2014, 09:50 AM,
#7
RE: gasket prob 03 / 650
tru i will check
Insanity doing the same thing expecting different results. Undecided
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06-30-2014, 10:33 AM,
#8
RE: gasket prob 03 / 650
Number ten is a "Slip Gasket". They are used so that the pipe can slide back and forth a little as the exhaust expands and contracts or moves because of engine vibration. The blow-by could be from a tear or groove in the gasket when you install it, the pipes not round e.g. (dented or deformed), one pipe being cracked, or the clamp not being tight enough. Hmm? Huh
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