High-G FJR Junkie!
Join Date: Jan 2013
Location: Millgrove, ON, CA
The hydraulic system of course could be hanging up and the easiest thing to check. If the mechanical parts (clutch lever, brass bushing in the lever, master cylinder pushrod) are all free to move/not gunked up, then all should be well. The only other thing, assuming the slave is good, is the rubber components in the master that may not let fluid return to the reservoir (swollen rubber, or insufficient travel not allowing the pushrod in the m/c to return, possibly blocking the hole). It may be intermittent/on the edge, so to speak. If all is clean, then perhaps a master cylinder rebuild kit is in order.... but again, not common, lots of FJR's with high miles that never needed this... except a good cleaning and light lube of the lever parts with silicone grease (won't wash out).
The other half of this is the clutch plates/spring pressure.. some have had some contamination of the plates (early on), dragged, needed the clutch plates cleaned and "the soak". I can't speak about Royal Purple, but one would think a m/c specific oil shouldn't have caused the issue. Rotella won't be a problem, tons and tons of people use that on every kind of bike without issue. The Gen3 clutch basket has extra holes to allow a bit more clutch plate lubrication, but I'd check all that out anyway... it's a simple job really, not what I'd call major surgery, but it is surgery that takes an hour.... well maybe a little longer on the slower red FJR's.
Once in there, you can see if the notches on the clutch basket are worn or if the clutch spring bolts are loose, etc. Can't hurt at all. As with most things, one would like to identify the specific issue, so perhaps don't do all things all at once and not know which one fixed it.
The true fix of course is get yourself one of the superior Root Beer bikes (not available in the US) or almost any other colour than red. The blue ones really go too, unless you have the matte finish.
Take your time, Steve, the suggestions to look into the stuff up at the lever and master is a good one, start there.......
Keep yer stick on the ice....
2014 FJR1300A - Root Beer
2009 CBF1000A - Sienna Red