Red cap Mobile 1 does not have the fuel economy additives that the green cap stuff has that will cause clutch slip. I remember checking this out, but don't recall the all the service ratings. The SG and earlier is the red cap w/o the fuel economy stamp.

Savage_Rob wrote on 12/31/69 at 16:00:08:


FYI; I ran across this while looking for parts.
IF you do get some slippage check this:
LS650 clutch springs are listed.
Love this kind of listing. Notice it shows all the part #s for the bikes at once. Great for cross refencing and gives a clue to finding other parts that might work w/ the LS.
The CSK26 CLUTCH SPRING KIT is also shown
to fit these;

GSX600 FJ/FK/FL/FM Katana
GR650 D/XD
GS700 EF/ESF
GV700 GLFG/GLF2
VS700 GLF/GLP/GLEF/GLEP/GLEG/GLEH
GS750 ED/ESD *Both my bikes take same part#, COOL!
GSX-R750 G/H
VS750 GLPJ/GLPK/GLPL/GLPM
VS800 Intruder
GSXR1100 G/H/J
GV1400 GDG/GTG/GCG/GDH/GTH/GCH/GDJ

"CSK SPRING KITS
Always fit new springs which get tired after miles of heat and use. EBC spring kits are 10% stiffer than standard and are sold in engine sets. As stated in general fitting/safety instructions, advise customers that lever will feel slightly heavier when uprating springs, and to test ride to acquaint themselves with the change in control."  http://www.motorcycleguy.com/the_shop.htm