The more I read the dumber I get. the mobile 1 I used was for cars not motorcycles. Big Differance in the formula, wish I had known that before. the car formula has friction modifers not found in mobile 1 v twin motorcycle. This is reason for clutch slipping. Found This in old thread started by larrybart march 23 2004.what lube are you running. worth the read. IM sticking with motorcycle oil from now on. live and learn .
Has anyone compared the Pennzoil and Valvoline motorcycle oil specs? Can't find any numbers online... Valvoline boasts "Superior wet-clutch protection" which would seem to indicate increased levels of ZDDP...
I was a wally world and was checking on oil. They nolonger sell the 20w50 Pennzoil car oil. They still have the Pennzoil 15w40 deisel oil. They have there store brand 20w50 car oil. I dont know how good it is. I have read on other threads that it works ok as long as you change it regular. I Still have enough of the 15w40 and the 20w50 for a coulpe more oil changes. I guess when it runs out I'll decide what to do then.
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 the report is interesting... but the evaluation for wet clutches like ours is meager:
Wet-Clutch Compatibility (JASO T 904:2006, ISO 24254:2007 limited review)
It has been noted that motorcycle oils must be multi-functional, meeting the needs of both the engine and transmission. An additional concern is in those applications in which the clutch is immersed in the oil occupying the transmission. As the clutch is a frictional device and oils are by design used to minimize friction, concern arises over the impact the oil may have on the operation of the clutch. How an oil performs in a wet-clutch application is, in part, a function of its additive system. An oil should be free of additives such as friction modifiers that can dramatically alter the dynamic and static frictional properties of the clutch and result in clutch plate slippage.
Wet-clutch compatibility is determined using JASO T 904:2006 test methodology, which is a subsection of JASO T 903:2006. Identical test methodology is also found in ISO standard 24254:2007. These procedures determine the frictional characteristics of an oil and allow comparison against a standard. That standard has four categories: JASO MB, MA, MA1, MA2 and ISO L-EMB, L-EMA, L-EMA1 and L-EMA2. Oils falling into the MB (L-EMB) category offer minimal wetclutch performance, while MA2 (L-EMA2) fluids offer the best performance to help prevent clutch plate slippage.
The scope of this paper did not allow for the evaluation of all oils in this area. As such, results of the oils tested were not included within the overall product summary. Testing revealed the AMSOIL motorcycle oils meet the highest rating of JASO MA2 (L-EMA2), offering superior wet-clutch performance. Motul and Royal Purple meet the JASO MA specification, the minimum standard specified by most motorcycle manufacturers. Although both Maxima and Torco claim to meet the JASO MA specification, testing shows Maxima only qualifies as a JASO MB oil, while Torco does not qualify for a JASO category at all.
So... where does this leave us?
That's all the motorcycle is, a system of concepts worked out in steel. ~Robert M. Pirsig, Zen and the Art of Motorcycle Maintenance
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