I believe a lot of the Shell people/engineers/management ride bikes and are pretty active on Rotella forums. Pretty sure they got it slightly reformulated to meet MA spec. I haven't used Castrol engine oil in anything for about 30 yrs, (have used their fork oil though) Didn't like the attitude of 'we know better than you how you ride your bike'. I always found GTX to be pretty nasty stuff,used Duckhams 20w?50 for a long time
There are three types of people in the world, those who can count and those who can't I dabble in rocket science, when I'm not picking my nose
I happen to own a very heavy duty diesel engine, and I know that oil for diesel engines specifically had to have certain parameters (such as sulfur content) to deal with the chemistry of the fuel and residues.
I'm not sure why this is a topic, but I've seen it come up several times. For the ultimate cost and benefit of your engine - what could possibly be better than using a fully synthetic high shear rated high temperature oil like the spectro series and changing it every 3k?
So it costs more - but it's the most beneficial maintenance you can do - and the worst mistake you can make.
Post by ShakerNorm on Aug 15, 2011 18:19:04 GMT -5
The problem with some of the synthetics is that they are TOO slippery..... If your clutch won't grab - you aren't going anywhere - and our clutches are wet clutches, so the oil has to work with the clutch. With a dry clutch - it isn't a factor, but we need to have some friction in the clutch and still minimize friction everywhere else.
When these things were designed, ZDDP was a common additive in the oil and it solved most of the problems with that system, but now - pollution and gas mileage are the overwhelming factors, so each time the API spec changes, they take out more of the stuff that our bikes were designed for.
It's not a great system, but it's what we have, and it's what the bikes were designed for, and now we have to deal with it.
It's kind of the same with old cars and unleaded gas - a lot of old cars (early 70's and older) will run on unleaded, but they will eventually eat their valves, because they were designed to use Leaded gas. The lead in the gas was a lubricant for the valves. If you want to run unleaded for any length of time without damage to your valves, then you have to have hardened valve seats and valves.
Definition of an Expert-
An Ex is just a Has-Been, and a Spurt is just some poor drip under a lot of pressure.........
Post by dps650rider on Aug 19, 2011 22:21:54 GMT -5
I have been using synthetic in my '78 all summer with no problems after upgrading the clutch plates and springs. I don't know if the clutch upgrade was needed more because of the oil or because of the engine mods but it works with no slippage whatsoever even with abuse.
Actually lead wasn't in gas to lube the valves, it was put in to increase octane and reduce knock in high compression engines. The reason valve seats wore on unleaded was because the leaded gas didn't need hardened seats and the softer seats were cheaper to use. 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
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