Pre mix ratio on a derbi drd evo

[Scandy flick]

Hi after derestricting my drd evo and uping the jet should i increase the pre mix auto lube to add more 2 stroke oil? Thanks

[Blau Zedong]

[YBR Ric]

No. The bigger main jet you've fitted to your two stroke will allow more oil through just as it will allow more fuel.
There is no need to alter the fuel/oil ratio, adding more oil will only reduce the fuel octane rating and reducing it will probably result in other problems.

[_Iain_]

Pre-mix - Two stroke is mixed with petrol in fuel tank. Hence pre-mix, as you have mixed it already whilst filling.

Autolube - Two stroke is in a seperate tank & is pumped into carb by an autolube pump.

You either have a premix bike OR an autolube bike.
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Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[uberkron]

The oil pump gives approximately 50:1. Its better than pre mix as oil is added even on trailing throttle. I run autolube, but fill the tank with 100:1. I like smoky two strokes that foul plugs and seize with carbon.
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i ride a zip 50 2smoke. It overtakes a hundred times a day.

[uberkron]

The oil pump gives approximately 50:1. Its better than pre mix as oil is added even on trailing throttle. I run autolube, but fill the tank with 100:1. I like smoky two strokes that foul plugs and seize with carbon.
____________________
i ride a zip 50 2smoke. It overtakes a hundred times a day.