Modified Engines

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newBookmarkLockedFalling Degree'ing in the cam - HOW?
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newBookmarkLockedFalling Re: Porting Your Own Heads(comments Only)
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newBookmarkLockedFalling Re: Porting For XStreme Power
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newBookmarkLockedFalling basics of portting your own heads
jack 23 9,943 by rockyroch
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newBookmarkLockedFalling Leakless XS Assembly
grizld1 49 21,538 by yamasarus
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newBookmarkLockedFalling Alternative Valve Springs
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newBookmarkLockedFalling Working The Stock Exhaust Guide and Boss Area
jack 31 8,993 by tomterrific
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newBookmarkLockedFalling Alternative rods and pistons
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newBookmarkLockedFalling Porsche tappet adjusters
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newBookmarkLockedFalling TO REPHASE OR NOT TO REPHASE…
terribletabo1 7 1,656 by olldernwiser
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newBookmarkLockedFalling cam specs
flea 21 3,997 by oldnwise
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newBookmarkLockedFalling PRO-1 RACING YAMAHA XS650 Engine Builder
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newBookmarkLockedFalling Smedspeed enlarged oil reservoir conversion
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newBookmarkLockedFalling Sneak peek at my crankshaft project
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newBookmarkLockedFalling It's time to do a BIG bore
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Modified Engines
Modified Engine Discussion
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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: 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
jimothyj: Hello everyone, I just joined & wish would have known about this site in 2014 when I brought my 1974 TX650A back from the grave. I have spent a good deal of $$ and alot of time on it. Just painted it and working on electrical, I will post pics soon, Apr 10, 2021 2:14:13 GMT -5
louisvan: trix13 - I had a problem with my 1975 SX650. When I got to highway speeds, the engine lost power. The problem was in the connectors. At a certain vibration and the wind pushing on the wiring loom, the connector lost continuity. A bad crimp to the wire. May 20, 2021 1:19:09 GMT -5
deadlykittin: Hey guys,. i have a 82 xs650 special, super new rider, with almost no knowledge on bikes. So was just riding it, getting used to the clutch and all that. But i was noticed its really hard to get the bike to start, using electric start. And the kick pump--- Aug 4, 2022 17:09:55 GMT -5
deadlykittin: loses compression after the first kick. Ontop of that, i noticed it 1, wont go into neutral when sitting still. and now it dies after getting it started in neutral and going into gear Aug 4, 2022 17:11:01 GMT -5
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