Originally Posted by swimmer
sorry, yes, 5-40.
I would suggest that 5W is, maybe, (I am speculating a bit here) too low for the cam chain tensioner to work properly when really cold. I wouldn't use any oil that's outside the recommended viscosity (10W-40) when a vital part needs oil pressure to work.
2002 black Tiger955i, 71000 miles.
2012 black Tiger800XC, 26000 miles.
Bike history [(N) = bought new] :- YAS1, RD350B(N), XS750(N), XT500, XJ650(N), XJ900S(N), CBX750, XL185S, XR250RF, XR600, KTM600LC4, TDR250, R100GS, TS200R, Tiger955i(N), Scrambler900efi, Tiger800XC(N)...