Modified Engines

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newBookmarkLockedFalling Degree'ing in the cam - HOW?
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bighairyralph 25 9,367 by grizld1
Jun 25, 2011 10:03:40 GMT -5
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newBookmarkLockedFalling Re: Porting Your Own Heads(comments Only)
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Diesel 51 17,551 by olie
Sept 9, 2012 14:39:39 GMT -5
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newBookmarkLockedFalling Re: Porting For XStreme Power
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Six-Five-O 66 28,258 by goodgollyjosh
Apr 22, 2014 7:45:18 GMT -5
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newBookmarkLockedFalling basics of portting your own heads
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jack 23 9,520 by rockyroch
Jun 19, 2007 23:41:49 GMT -5
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newBookmarkLockedFalling Leakless XS Assembly
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grizld1 49 20,007 by yamasarus
Apr 2, 2010 22:15:12 GMT -5
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newBookmarkLockedFalling Alternative Valve Springs
jack 8 4,026 by garbln
Dec 14, 2009 13:20:34 GMT -5
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newBookmarkLockedFalling Working The Stock Exhaust Guide and Boss Area
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jack 31 8,772 by tomterrific
Oct 22, 2010 8:18:29 GMT -5
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newBookmarkLockedFalling Alternative rods and pistons
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eric123 293 51,998 by jack
May 11, 2015 16:11:21 GMT -5
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newBookmarkLockedFalling Porsche tappet adjusters
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tony101bikes 112 23,476 by urbanbody
Jan 18, 2010 13:43:35 GMT -5
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newBookmarkLockedFalling PRO-1 RACING YAMAHA XS650 Engine Builder
terribletabo1 0 1,462 by terribletabo1
Feb 9, 2017 15:18:19 GMT -5
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newBookmarkLockedFalling TO REPHASE OR NOT TO REPHASE…
terribletabo1 5 867 by preston
Feb 1, 2017 20:14:52 GMT -5
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newBookmarkLockedFalling Smedspeed enlarged oil reservoir conversion
terribletabo1 6 982 by willjamesbarber
Sept 7, 2016 3:14:18 GMT -5
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newBookmarkLockedFalling cam specs
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flea 18 3,242 by flea
Jun 7, 2015 18:20:14 GMT -5
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newBookmarkLockedFalling Sneak peek at my crankshaft project
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mrriggs 24 4,717 by mrriggs
Mar 13, 2015 11:38:00 GMT -5
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newBookmarkLockedFalling It's time to do a BIG bore
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mrriggs 19 3,919 by crazypj22
Nov 24, 2014 19:09:38 GMT -5

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Modified Engines
Modified Engine Discussion
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scabber: I.m Jul 23, 2015 14:02:55 GMT -5
scabber: I'm back Jul 23, 2015 14:03:46 GMT -5
r80rt: :)This is a splendid write up, THANK YOU!!!! Dec 26, 2015 16:54:05 GMT -5
mashermoto: What the what is this shoutbox for? Or should I shout, WHAT THE WHAT IS THIS SHOUTBOX FOR! May 12, 2016 22:22:21 GMT -5
motormike: Good Day ...just a FYI.. Wild Cat is this Labor Day weekend. Still go'n on. A few 650's still make the scene. Various rides at different skill levels each day.. awards dinner sunday eve. BS in the park'n lot after dinner. :) Aug 23, 2016 7:57:01 GMT -5
lsettle: First post in over 6 years! Aug 28, 2016 19:45:17 GMT -5
kardon: Wow quiet here, where did they all go. Oct 7, 2016 2:18:13 GMT -5
gggGary: XS650.com LOL Feb 16, 2017 20:49:02 GMT -5
buell88: Anybody have any idea who built the xs650 tracker used in the Draggin Jeans Ad on Pipeburn? May 16, 2017 16:24:09 GMT -5
joshua: The regulator/rectifier unit I got from Mikes PMA has closer hole spacing than original. Are we supposed to mill the holes to fit? Jun 7, 2017 19:25:58 GMT -5
joshua: My bad. I found the bracket they supplied to mount the rectifier/regulator... Uh oh. How is this meant to work? Which way is it meant to mount? Looks like I have to use some spacers or something. Good instructions would be nice. Jun 7, 2017 22:09:52 GMT -5
craig8johnson: Not sure if this is the right spot or not but oh well... Jul 11, 2017 18:04:15 GMT -5
craig8johnson: I'm checking the charging system. I'm afraid I might have fried the last battery. With the solid state regulator (after market) what should it be charging at. The book says, I think, 15 volts. I'm hitting 17 when revved. Is that too high? Jul 11, 2017 18:06:19 GMT -5
gggGary: Yes 17 volts is too high, about 14 volts is max, sounds like you don't have the right regulator or it's wired wrong. Jul 13, 2017 6:54:33 GMT -5
dean: Just saying Hello, new member who is going to fix up a 79 XS650 that has seen its better days. I will definitely have lots of questions coming up. Jun 23, 2018 16:45:32 GMT -5
tt650: Trying to breathe life into a 1980 that's been stored (indoors) for 25 yrs. Air filters are dry rotted. Have cleaned carbs but she only runs briefly on choke then stops. Need jet setting info and other ideas that might help her idle and rev. Jul 3, 2018 19:15:19 GMT -5
trix13: Hey everyone! New to the forum and am fighting those gremlins!! New charging system, ignition switch, coil and fuse box. Resistance is higher than normal on the ignition pick up so I'm trying to find one. No such luck yet. Aug 16, 2018 8:50:48 GMT -5
trix13: Also, even though all of my connections are clean, I cannot seem to find out why , when at higher rpms, I hit the signals and the rpms pulse with the signals...hahah. same with the brake light. I appreciate all input!! Aug 16, 2018 8:55:08 GMT -5
bob99: how do I post a question. I am new to the forum Jun 6, 2019 10:52:10 GMT -5
adlpc: Hello all! Been enjoying your edifying posts and discussions - and as a fan of the XS650 since my early teenage years happy that I now own a 1980 Special which I plan to turn into a vintage half faired racer. Thank you all for being here! Oct 1, 2019 0:58:56 GMT -5