If using Motul, either go for full synth, like 7100 (no need for the expensive 300V). If going semi-synth, avoid Motul (the 5100), get some other brand, e.g. Silkolene, Bel Ray etc. 5100 costs more than it is worth IMO, or Serbia gets a bad batch of it.
Thanks guys, I used 7100 in a big bore 434cc DRZ with no probs at all. So fully synth is OK to use with the thou?
I've gone for Castrol Power 1 10W40, see how that goes.Thanks for the input