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5th January 2015
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XL FORUM TEAM MEMBER
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Join Date: Jan 2008
Location: So Cal
Posts: 21,298 Sportster/Buell Model: XL1200C Sportster/Buell Year: 2006 Sportster/Buell Model #2: XL1200C Sportster/Buell Year #2: 2006 Other Motorcycle Model: 48 "Totalled" By a Douche Other Motorcycle Year: 2012
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Re check the compression with the throttle plate and slide wide open.
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Thy Sportster Come
It Shall Be Done
On Earth as it is on Salt
2006 Sportster XL1250C
Hammer Sledge Heads 1.98X1.61 Valves
Hammer 600 Cams
Big Ass CP/Hammer Pistons
Mikuni HSR 45 /Hammer Billet Manifold (Now HSR 48)
Jetted 27.5 slow,182.5 Main
97 Needle,Clip posistion 3
Hurricane Flow 3" offset AC,Rocketman Mod
Daytona Twin Tec TC88A,Rico Scarecrow Map
Sumax Thundervolt plug wires,NGK DCPR8EIX spark plugs. Gapped .040 and Indexed
Cycle Electric Stator and Regulator
Alto Carbonite Clutch (now with Barnett Pressure plate and 25% stiffer spring)
Royal Purple 20W50 MC Primary oil
Patriot Defender Pipe
Royal Purple 20W50 MC Engine Oil
Napa 7148 oil filter
Max Power, 111.47
Max Torque, 84.39
Best 1/4 Mile ET to date 11.85
Best 1/4 Speed to date 115.14
Build by Jester Motorwerkz West
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5th January 2015
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XL FORUM TEAM MEMBER
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Join Date: Jun 2010
Posts: 11,341 Sportster/Buell Model: 1200R Sportster/Buell Year: 2005 Other Motorcycle Model: 5 bikes and 1 quad
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Quote:
Originally Posted by rocketmangb
Re check the compression with the throttle plate and slide wide open.
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+1. 120# is anemic. You should have a good 190# to 200#. |
6th January 2015
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Biker
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Join Date: Apr 2014
Location: Phoendale
Posts: 27 Sportster/Buell Model: Sportster 883L Sportster/Buell Year: 2005
Reputation: 10
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Ok, performed another compression test. Results showed 125 lbs. I'll do a leak down test tonight. My guess is bad valve seats. I didn't do a valve job with the upgrade, I just cleaned them up the best I could. On average, if I payed a shop to do a valve job and port & polish. What should I expect to pay?
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6th January 2015
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Senior Custom Bike Builder
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Join Date: Oct 2009
Location: Anglesey
Posts: 2,620 Sportster/Buell Model: 883r -1200 Sportster/Buell Year: 2003 Other Motorcycle Model: 850 Yamaha TRX Other Motorcycle Year: 98
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Quote:
Originally Posted by wedge
+1. 120# is anemic. You should have a good 190# to 200#.
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Another+ on these Guys. N2 wont rob compression and N4's are normally 180+
I think You have fond what you were looking for. Good luck |
6th January 2015
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A Million Facts & Figures
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Join Date: Jan 2005
Location: Famous Potatoes
Posts: 10,098 Sportster/Buell Model: XL883 Sportster/Buell Year: 2007 Sportster/Buell Model #2: Buell Cyclone Sportster/Buell Year #2: 1999
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Did you put the longer pushrods on the exhaust and the shorter ones on the intake?
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7th January 2015
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Biker
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Join Date: Apr 2014
Location: Phoendale
Posts: 27 Sportster/Buell Model: Sportster 883L Sportster/Buell Year: 2005
Reputation: 10
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Push rods went in the exact way they came out.
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8th January 2015
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Biker
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Join Date: Apr 2014
Location: Phoendale
Posts: 27 Sportster/Buell Model: Sportster 883L Sportster/Buell Year: 2005
Reputation: 10
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Ok, let me throw this one at ya. Someone suggested that they are pretty sure that the problem is my clutch is slipping. To me, the symptoms do sound right for similar effect. But, I'm not sure that's the problem. I didn't have any issues with the clutch before the upgrade, that I noticed. I think I will adjust it just to see if there is any play or slack. But, what's your thoughts on that?
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8th January 2015
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XL FORUM TEAM MEMBER
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Join Date: Jun 2011
Location: On a farm
Posts: 6,126 Sportster/Buell Model: XL77.2R Sportster/Buell Year: 2006
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Spring plate failure also does act like clutch slipping under load.
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8th January 2015
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Chief Know It All
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Join Date: Oct 2009
Posts: 410 Sportster/Buell Model: XLH1250 Sportster/Buell Year: 2000 Sportster/Buell Model #2: XLCH Sportster/Buell Year #2: 1969
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Clutch could be slipping but there is still the issue of 120 psi.
The leak down test you suggested sounds like a good step to verify all is well inside.
You didn't confirm if you held the throttle wide open when you cranked it.
Nutter
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8th January 2015
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Biker
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Join Date: Apr 2014
Location: Phoendale
Posts: 27 Sportster/Buell Model: Sportster 883L Sportster/Buell Year: 2005
Reputation: 10
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I haven't performed the leak down test as of yet. The last compression test, I removed the air cleaner and held open the slide and throttle plate manually. That's when I achieved the 125 p.s.i. reading. A few other sources said the 120-125 should be good for my set up.
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