A oil primarialy only is there to cool the the wet clutch on a M/C. They enclose those things in the case to keep the clutch assembly/basket out of the elements and clutch dust off the right boot,the elements can included a car wash..FWIW the best oils I have used is the Castrol R4 , the Motul E-100 10/40 and Valvoline 40wt racing dino,,when it is up to temp has never had a smoother shift than with the now called VR1 Racing oil. No real help for some of the Hondas unless you split the case and back-cut the engagement dogs but if this is done don't get the full race cut,you will experience too much driveline backlash.
If you experience clutch drag while cold the oil is too viscous,,I really like the R4 and the E-100 Motul oils but older seals and older bikes do not like these oils
It looks like Bel-Ray now offers a real oil and a few others have group IV'V's.One just has to look around and the markup is huge! I buy R4 for 5 bucks a quart even to my door. I might throw it in my wifes commuter car and run it a couple years and do a UOA on it for ya
Quote:
"You fellas still think used oil analysis in a shared sump bike isn't worth bothering with? "
Yep it's a waste if using a good oil,you can see the metallic particles in the oil so whats the use?,now using a UOA to find that good oil that's not shearing might be needed. Most cannot ride a bike fast or long enough to kill the oil early anyway unless they are using a PCMO or other undesirable oil and or crazy oil change intervals with a good oil.
When the powerlevel is increased you will feel the difference with a oil containing moly unless you increase the spring pressures on the clutch.If the clutch is a little weak you will notice when changing to a synlube because it will slip a bit .
I still do not think moly plates to ultra smooth surface materials like main and rod bearings. The aluminum plates in a M/C clutch may get some plated in the low side irregularities,same will cylinder walls and pistons . A change to a barnett steel plate would be a priotity of mine and how the starter drive was designed would be of upmost importance to me if wanting to use a FM'd oil
EDIT:
A friend of mine put PTFE in a Suzuki GSXR years back,,it killed the clutch
His friend put STP in a bike,slipped from the git/go so don't try any 132 would be my opinion.
In 1987 on Hollywood BLVD at dawn I watched my friend race a Lambo V-12 from a redlite,,the GSXR 750 did well until the middle of second gear,,those Countach's will run! They sound wicked too
Anyone here every been to the rock Store on Mulholland Drive? Plastic pieces at every turn on the drive along with deep scares in the pavement,further North in thr high country the roads are white tire shredding rock,,easy to get a knee on the ground there and turn the tires blue
[ December 31, 2002, 08:07 AM: Message edited by: dragboat ]