Should be able to reach 2nd and R without doing other gears first, however R occasionally grinds a little on mine. Since they're both forward in the shift pattern you may not be getting full forward movement? Check for adequate cable travel at both the gearbox and the shifter lever.
Funny, I just replace my clutch master last week, it didn't fail but was leaking. When removed and inspected, the internal walls were corroded and scoured, fluid black (only 1k miles! but 5 years old). My reverse would often needed 1st gear engagement before I shift to reverse otherwise it grinds. After replacing the new m\c the first thing I noticed was no grinding into reverse (only if I'm coasting forward while trying to shift into reverse). BTW, mine is rod shift not cable.seems that the problem has been the cluch master cylinder causing the clutch to drag. the whole master have given up the ghost. Replacemet coming this week.
Its only appropriate for the road if you are running open megaphones
More to come. Should be back at the track next friday with fresh rubber andThat is a great perspective thanks