Master cylinder

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10ecjed
Senior Member

1980G/79'F

Posts: 438

Master cylinder Feb 3, 2015 7:15:14 GMT -5 via mobile

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Post by 10ecjed on Feb 3, 2015 7:15:14 GMT -5

Well, I broke a mtg bolt on the master cyl a couple years ago. My friend gave me one from his XS 850. Which comes with dual disc. That's cool I want to convert over to dual in the future.
The future is here. While ordering a rebuild kit from MM, he told me not to use the larger cyl. They have a hard pill to them. Which is correct. So I dug out the old stock one and rebuilt it. Went to mount it that's when I remembered it the a broken bolt. Not only is it broken, when I tied to get the bolt out, the drill walked and took out the inside edge. So now a 1/8 of the hole is gone.
Took it to work and friend with machine shop got the bolt out with an end mill. Since the hole is deep I am tapping more threads down there and will use a longer bolt.
The machinist saved my butt on this since I already had rebuilt the cyl.YAHOO. Dual disc finally. After 8 years of owning it.
Can't stop now.

10ecjed

mrriggs
Crew Chief

Posts: 682

Master cylinder Feb 3, 2015 11:58:28 GMT -5

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Post by mrriggs on Feb 3, 2015 11:58:28 GMT -5

Ha ha, that's how I justify having a garage full of machine tools. "See Honey, I was able to fix this part instead of buying a new one. I'm saving us money."

Good call on using the smaller master cylinder. When I had my XS750 I put on a smaller master and it greatly improved the power and feel of the dual disk setup.

motormike
Crew Chief

Posts: 1,143

Master cylinder Feb 4, 2015 19:17:43 GMT -5

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Post by motormike on Feb 4, 2015 19:17:43 GMT -5

On my 77' D.. I had dual disc and a stock m/cylinder... for years... as in over 20... never had a problem... with the exception of the caliper slides would sometimes stick over winter storage.

70',82' Xs650, 65' Tri 650 Tiger, 70' 450 Ducati "Jupiter", 1970 350 Ducati,66' Triton (featherbed frame) w/73' 750 Tri engine, 68' Honda 450P (Police),75' "CONDOR"(Swiss Army), 29' Motobecane (French), 50' & 52' Terrot Paris Police m/c's, 54' Peugeot French Military Police m/c.. Algerian veteran. 50' Alycon French fire bike, 82' Cx500 Police trike (Ex Chicago Police 2011 R/Enfield, with sidecar, 06' Helix, 62' Cushman, 71' Guzzi Ambassador, 65' Ford Mustang, 04' Mustang convertible.. 1 wife

10ecjed Senior Member 1980G/79'F Posts: 438	Master cylinder Feb 4, 2015 22:38:22 GMT -5 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by 10ecjed on Feb 4, 2015 22:38:22 GMT -5 Thanks for the replys. Cant wait to try it out.
	10ecjed

preston Crew Chief 1975 XS Posts: 596	Master cylinder Feb 6, 2015 17:40:15 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by preston on Feb 6, 2015 17:40:15 GMT -5 susposed to be nice on this Sat, text me if your riding past here now that you can stop on a dime.. Preston

10ecjed
Senior Member

1980G/79'F

Posts: 438

Master cylinder Feb 8, 2015 8:33:27 GMT -5 via mobile

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Post by 10ecjed on Feb 8, 2015 8:33:27 GMT -5

Yea yesterday was a nice day, but today is better temp.
I got the brakes working pretty good I think. Rode it down the street a couple times.
I'm gonna take it up on the mountain today and try it out. I broke my brake light switch. Oops. No brake lights today.

10ecjed

10ecjed Senior Member 1980G/79'F Posts: 438	Master cylinder Feb 8, 2015 22:51:39 GMT -5 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by 10ecjed on Feb 8, 2015 22:51:39 GMT -5 I guess to close this thread up, any more and it will have to be moved. I'll report the brakes work very well. But Preston, they don't stop on a dime.
	10ecjed

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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: 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

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

Master cylinder

Post by 10ecjed on Feb 3, 2015 7:15:14 GMT -5

Post by mrriggs on Feb 3, 2015 11:58:28 GMT -5

Post by motormike on Feb 4, 2015 19:17:43 GMT -5

Post by 10ecjed on Feb 4, 2015 22:38:22 GMT -5

Post by preston on Feb 6, 2015 17:40:15 GMT -5

Post by 10ecjed on Feb 8, 2015 8:33:27 GMT -5

Post by 10ecjed on Feb 8, 2015 22:51:39 GMT -5

Shoutbox