Actually its recommended to change springs.. but unless you are gonna push it too far (over 10k RPM) i dont think there is gonna be problem,..
can you reach on stock cam 10k rpm with these mods?... Its gonna be more than little gain :P, i guess. keep clearances close to stock, before starting the engine with starter.. try turning engine with that bolt.. to see if valves doesnt hit piston, as you have beautiful bike.. and.. if it start and runs, i guess you will need to increase idle rpm a bit due to more wild camshaft timing :), and also lif it start and runs,, dont rev it like crazy,, rev gently, as it needs a bit of break in..
PS: What is your current engine miles? (not mileage, but how many miles did already the bike travel.. )
aaand. give us some pics, because i want to do this too,.
If it runs good, give us some video :)
Have fun tuning your RMR :)