Update on Clutch issue. Found that the dealer was correct. I have not had any issues with the clutch dragging since the oil change back to Suzuki standard oil. I hate to admit it! No other items were done at the dealer other than that and confirming settings of free play. Have put 1600 miles since occurrence and no issues. It seems that the motul oil in this bike is not liked by the clutch. Well, frequent oil changes and factory Suzuki oil on the shelf.
I would not expected a Motul oil which I suspect is the 5100 semi synthetic 10W- 40 used to cause issues as I have used it myself in the past, till I found it not worth the double cost over basic mineral oils of the same grade based on my use.
Suzuki don't mandate any oil other than what they say in the Owners Manual.
That Motul oil has been around a long time as it's got a range of S grade service rating going from the very old oil SG standard upwards.
Cars from the 1960' and 70's need the SG grade for the extra phosphorus to protect big end bearings from undue wear.
I tried to attach the info below in a PDF file, but as it was 24 KB, it failed as the Forum limit is a lousy 4 KB lower at my 20KB file .
So I cut and pasted it. It certainly reads OK for use here for the GSX-S1000 that I can see. Any see a problem ?
5100 4T 10W-40
High Performance Motorcycle Lubricant
Technosynthese ® - Ester
TYPE OF USE
Street & road bikes, trails, off road bikes, enduro, trial…fitted with 4 Stroke engines, integrated
gearbox or not, wet or dry clutch, engines meeting Euro 2 or Euro 3 emission regulation, fitted with
exhaust gas after treatment systems: catalytic converters, air injection into exhaust pipe...
Suitable for specific SUZUKI, YAMAHA, KAWASAKI engines requiring SAE 10W-40 viscosity grade
Other uses: street bikes without catalytic converters, scooters, ATV’s, UTV’s…
STANDARDS API SM / SL / SJ / SH / SG
SPECIFICATIONS JASO MA2 under N° M033MOT112
Technosynthese ® lubricant reinforced by Ester base stock to warranty anti-wear properties and
improve gear protection and life time.
Improved oil film resistance at high temperatures for engine durability.
Optimized Phosphorus and Sulphur content (JASO MA2 < 1200 ppm) for better operating conditions
of catalytic converters.
The innovative anti wear additives package provides excellent gearbox protection. FZG Gear Test
results: Pass FLS 14 . The FZG (Forschungsstelle für Zahnrader und Getriebebau) Test, evaluates
fluid lubricating and wear protection properties at the interface of a loaded set of gears.
JASO has created its own 4-stroke motorcycle standard -JASO T903- which has three grades MA,
MA1 and MA2.
JASO MA2 offers the most efficient friction levels to guarantee the clutch engagement during the
three riding modes: Starting, Acceleration and Constant Speed.
Drain interval: according to manufacturers’ recommendations and tune to your own use.
Can be mixed with synthetic or mineral lubricants.
Color Visual Amber
Viscosity grade SAE J 300 10W-40
Density at 20°C (68°F) ASTM D1298 0.871
Viscosity at 40°C (104°F) ASTM D445 89.8 mm²/s
Viscosity at 100°C (212°F) ASTM D445 13.82 mm²/s
Viscosity Index ASTM D2270 157
Pour point ASTM D97 -33°C / -27°F
Flash point ASTM D92 226°C / 438.8°F
TBN ASTM D2896 7.5 mg KOH/g