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One thing after another...

mvalenti

mvalenti

Forum Mentor
So with the help of Ray and the shim club, I replaced some shims and surprise, got some more power. Took it out for a shakedown last night and all was going good and all of a sudden loss of power like it lost a coil. Tracked it to the fuse block, no power bad connection somewhere.wife came to the rescue with tools and a bit of wire. Jumped out the starter and coil and made it home less lights. What's where is the bike seemed to run a little stronger too... It pulled harder, and when I really got on it the clutch slipped a bit. So 2 questions. I'm guessing a poor coil Connection caused some loss of power, gained when jumping out the old fuse block? And my slipping clutch, seems to be adjusted right, oil is standard 10-40 not synthetic, recently added 1/2 cup of marvel mystery oil to it. Could that be the culprit?
 
mvalenti said:
So 2 questions. I'm guessing a poor coil Connection caused some loss of power, gained when jumping out the old fuse block?
Click to expand...
Quite possible. Turn the key ON, check the voltage at the coils (orange/white wire), compare that with battery voltage. If the difference is more than about half a volt, you need to find out where you are losing the voltage.


mvalenti said:
And my slipping clutch, seems to be adjusted right, oil is standard 10-40 not synthetic, recently added 1/2 cup of marvel mystery oil to it. Could that be the culprit?
Click to expand...
"Seems" to be adjusted right. :-k
How much of a gap is there between the lever and the mount, right there where the end of the cable is? I think the book calls for 2-3 mm.

Synthetic oil will not make the clutch slip.

MMO should not make the clutch slip.

32-year-old clutch springs WILL let the clutch slip. $20 for new STOCK springs, about $10 for a gasket, you will be good to go.
If you leave the bike on the side stand, you won't even have to drain the oil to change the springs.

.
 
Thanks Steve. I will check clutch tonight and I will be checking my harness, coil voltage as well. The bike came with a slew of parts, even saw some clutch parts in the box. Have the gasket already, ended up buying a set "just in case"..... Pricing fuse blocks and will purchase today, cheap insurance...

Just a thought, since I just reshimed.... can you add a washer behind the clutch spring in effect do the same as shiming valve?

-Mark
 
Yes, you can shim the springs. But don't shim too much because the springs are pretty close to coil binding in the stock configuration.

If you used auto oil then there may be friction modifiers leading to your clutch slippage. It's best to stay clear of auto oils anyway since they have low zinc and phosphorus (important high pressure additives).
 
good to note, thank you. Should I be looking for oil specific for motorcycles, i.e. wet clutches?

-Mark
 
mvalenti said:
good to note, thank you. Should I be looking for oil specific for motorcycles, i.e. wet clutches?

-Mark
Click to expand...

Either motorcycle oil or diesel engine oil (my recommendation). Shell Rotella diesel oil is certified for use with wet clutches, although just about any diesel oil is a fine choice as they contain lots of high pressure additives and rarely have any additives that mess up clutches.
 
If he accidentally did use oil with friction modifiers..is there a need to "clean" the fibers and plates? If so, how would that be accomplished?
 
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