Post by jetmechmarty on Mar 9, 2013 17:26:17 GMT -5
The answer is yes and no. The early bikes use a one piece pushrod and the later bikes use a two piece pushrod. I believe you can interchange them. I hear of folks switching the later bikes to the single piece unit, but not the other way around. I wonder why Yamaha changed it?
This image is the '73 TX650. Item 19 & 20 is the pushrod.
This image is the '77 XS650D. Items 18, 19, & 20 make up the pushrod.
Somehow my '74 ended up with a 7 plate clutch from a later bike, and it seems like the clutch pushrod might be a bit short. Just because I need to move the adjustment screw way out before it contacts the end of the pushrod. I wonder what's up with that?
Those diagrams are helpful - Thanks It makes me think that I could probably put together a custom length pushrod if I felt it was nessecary, without much difficulty.
I think I'm going to fabricate a custom length clutch pushrod, cause I have the adjustment screw adjusted in til it's nearly as far as it will go and still safely be engaged in the locknut. I have a spare pushrod and using that will restore it to the original dia where it fits in the L side bushing too. This is all a result of the previous owner putting a 7 plate clutch in there, I suspect.
Fortunately for me, I like working on bikes nearly as much as I like riding...
Post by ShakerNorm on Mar 10, 2013 18:46:51 GMT -5
It could be the 7-plate clutch, but the 7-plate setup should be the same thickness as the 6-plate setup - the plates are a little thinner. There's also a possibility that it was assembled with one washer missing - it's pretty common to miss one washer that isn't shown in most diagrams - especially earlier ones. Here's a link to a posting that explains it..... xs650temp.proboards.com/index.cgi?board=sprocket&action=display&thread=12288
Go down about 2/3 of the page, and you'll see a coloured pic that shows the "missing" washer. It's only missing because the torrington bearing (#3 in the picture) usually comes with a new one, so Yamaha didn't give it a separate part number.
Definition of an Expert-
An Ex is just a Has-Been, and a Spurt is just some poor drip under a lot of pressure.........
Well there is a missing washer, but it isn't the one under the needle bearing. Judging from the pics, the earlier clutches had a pretty thick lockwasher under the big retaining nut and the later had a beveled washer? There was something about this that didn't seem right to me as I assembled it and that was when I put that lockwasher on it made the stack height of the of parts big enough so that the nut was actually higher than the end of the trans mainshaft. With it that way the pusher(? part #11) was actually contacting the nut around the edge, and that spaced the whole pushrod assy out a bit further that it ought to be. I think that's the source of the problem. I should be using a thinner washer than the lockwasher. So now I need to find the right washer and then I think it will be alright.
Also; Luck was with me and I have a spare engine which had the later design clutch pushrod and I just compared the length to the other type and they are both the same length. I believe that what I need to do is eliminate that thick lockwasher and then things ought to align correctly.
If you look at the pics in jetmechmarty's first post you will see the older version used a nut, a thick lock washer and a flat washer. In the later version they used a nut, a spring, belleville washer, much thinner type lock washer and a thin washer. Your using of the conventional lock washer is to thick. Boats.net list the spring, belleville as available. Also the two piece rod had an aluminum outer rod, I have one here in my hand. I think the inner was aluminum too but not sure. They used the alloy rods hoping the expansion rate of the rods would match the exransion rate of the cases. This would eliminate the difference in cold to hot clutch adjustment. I also think they used a two piece rod to prevent bending. A long rod is more apt to bend than a short rod. The main problem with using the twp piece rod is the outer rod waers the bushing behind the seal faster and promotes wear on the seal. Worn seals leak oil. Swap one problem for another. Leo
75 XS650B with 79 forks and dual disc, braided lines, disc brake on back, Pamco ignition, Pamcopete's reg/rec mods, kill switch relay, home made harness, all LED turn, brake and tail lights, tapered head bearings, bronze bushes in swing arm, soon to get shock and fork upgrades
Well... this is getting interesting. I'll need to take the whole thing apart and see how things look. I have a spare clutch and it's a 6 plate and depending upon how things look, possibly I'll just put that in.
I'm wondering about that bevel washer, does that take the place of the lockwasher? Should it be replaced with a new one or can it be re-used?
Fortunately for me, I like working on bikes nearly as much as I like riding...
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
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