RE: Saito 125 Fuel Mix
Mik,
Despite Saito's recommendation, I do use some castor oil.
My mix is now 15% nitro, 18% Klotz Techniplate, 2% Klotz BeNOL castor oil and the remaining 65% methanol.
As soon as I receive the oil from Cooper Fuels, all the Techniplate will be replaced by 15% of this superior oil; and the methanol will be bumped to 68%.
Castor oil sticks to the bearings and protects against the increased tendency of these four-stroke engines to rust.