What?
Actual Honda spec for the gear oil is 10W-30 gear oil (shocking that eh?) but 10w-40 (as long as it's not got slippy car agents in it) is OK.
Bloody 2 stroke oil is NOT!
I fail to see the relevence of injector or pre-mix.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread