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16th April 2012
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Chief Know It All
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Join Date: Apr 2010
Location: North Topeka, Kansas
Posts: 439 Sportster/Buell Model: xl1212c Sportster/Buell Year: 2006 Sportster/Buell Model #2: XLH883 (TOTALLED) Sportster/Buell Year #2: 2003
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Top Dead Center
Stupid question here, how do you find top dead center when both cylinders, pistons, and heads are off? Can I take cam cover off and just line the marks up? And if so, how do I keep the cams from coming out with the cover? My dad had a brilliant idea to roll motor over after I pulled everything off yesterday while trying to do my 1212 conversion on my '06 883.
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'06 HD XL1212C. Stage 2 883 Heads, Cat 3 Cams.
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16th April 2012
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Beware broken records...
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Join Date: Dec 2006
Location: Thornton and Boulder, Colorado
Posts: 4,952 Sportster/Buell Model: XL 1200 Low Sportster/Buell Year: 2006 Sportster/Buell Model #2: 1200 XLH Sportster/Buell Year #2: 1999
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Bad dad! No doughnut!
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"Assuming you know how I feel about the Constitution just makes you look stupid."
--Special Agent Megan Reeves, Numb3rs
2006 1200 Low--NRHS HurricaneFlow 2", slash down Screamin' Eagle Street Performance exhaust, Progressive 12" 418s w/ heavy duty springs, Progressive fork springs + Ricor Intiminators, HD forward controls, Mustang Vintage Wide seat, HD QD windshield (smoked), HD mini-apes, and surely more to come...
1999 1200 XLH--In progress.  Custom Led Sled frame--4" up, 2" out; Baker/Vulcan chain conversion; Buell 17" rear wheel...
http://xlforum.net/vbportal/forums/s...d.php?t=708796
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16th April 2012
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XL FORUM TEAM MEMBER
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Join Date: May 2005
Location: San Diego
Posts: 678 Sportster/Buell Model: 883 XL converted to 1200 Sportster/Buell Year: 1994
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Quote:
Originally Posted by jumpsteady
Stupid question here, how do you find top dead center when both cylinders, pistons, and heads are off? Can I take cam cover off and just line the marks up? And if so, how do I keep the cams from coming out with the cover? My dad had a brilliant idea to roll motor over after I pulled everything off yesterday while trying to do my 1212 conversion on my '06 883.
Sent from my C771 using Tapatalk
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I assume you are trying to find TDC for the compression stroke? If so, just watch the intake lifter for the cylinder you are trying to set at TDC compression. When the intake lifter starts dropping down, the intake valve would be closing and the piston will be coming up on the compression stroke. When the rod is as high as it will go, you are there. I don't think that when the marks on the cams are lined up it means that you are at TDC, so pulling the cam cover off probably won't help any. Roger |
16th April 2012
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XL FORUM TEAM MEMBER
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Join Date: Oct 2007
Location: Perfidious Albion
Posts: 6,945 Sportster/Buell Model: XL1250S Sportster/Buell Year: 1998
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94 Sporty has it right, but I can't think why you'd want to find TDC when your barrels and pistons are off.
If you're fitting cams, the motor is not at TDC on either cylinder when aligning the cams -just line up the marks on the pinion gear and cams.
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16th April 2012
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Chief Know It All
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Join Date: Apr 2010
Location: North Topeka, Kansas
Posts: 439 Sportster/Buell Model: xl1212c Sportster/Buell Year: 2006 Sportster/Buell Model #2: XLH883 (TOTALLED) Sportster/Buell Year #2: 2003
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Quote:
Originally Posted by steelworker
94 Sporty has it right, but I can't think why you'd want to find TDC when your barrels and pistons are off.
If you're fitting cams, the motor is not at TDC on either cylinder when aligning the cams -just line up the marks on the pinion gear and cams.
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Well then that solves that. I guess that I thought the front cylinder was at TDC when the marks on the cams lined up. This makes me feel a lot better. Thanks guys.
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