john b Posted January 25, 2015 Report Share Posted January 25, 2015 Hi there As the question says ! I've got a sprite with 37a engine and my son has a James with 8e engine Is modern 2 stroke ok ? If so what ratio Cheers John Quote Link to comment Share on other sites More sharing options...
dadof2 Posted January 25, 2015 Report Share Posted January 25, 2015 Have a look at the Greeves posts on same subject Quote Link to comment Share on other sites More sharing options...
ruffmutt Posted January 25, 2015 Report Share Posted January 25, 2015 Hi John, I run my 8e,s on racing castor @ 80 or 100 to one, besides the lovely smell, my engines last as long as anyone elses. In the Yamaha ty250 manual, Yam recommend Castrol R40 at 80 to 1 and the modern castors are far superior, so give it a try. Trev. Quote Link to comment Share on other sites More sharing options...
suzuki250 Posted January 25, 2015 Report Share Posted January 25, 2015 80:1 on a iron barrel air cooled bike...... Id say more like 40:1 or richer! Quote Link to comment Share on other sites More sharing options...
jon v8 Posted January 25, 2015 Report Share Posted January 25, 2015 (edited) Stick some of this in it,at least you wont be choking the riders queuing behind you - that's if you are feeling minted... http://www.aspenfuel.co.uk/products/environmental-fuels/aspen-alkylate-petrol/aspen-2-full-range-tech/ Edited January 25, 2015 by jon v8 Quote Link to comment Share on other sites More sharing options...
john b Posted January 26, 2015 Author Report Share Posted January 26, 2015 Thanks Guys ! Quote Link to comment Share on other sites More sharing options...
aawil Posted January 27, 2015 Report Share Posted January 27, 2015 tried running my iron barrel 34 a trials outfit on 40-1 great in sections but partial seizures on the road between sections was a prob lem even with modern synthetic oil i have gone to 25-1 and the bike is still great in the sections and it keeps going and you can thrash it for miles with no problems , so having tried various mixes i know what i am sticking to 25-1 as greeves recomended, . will Quote Link to comment Share on other sites More sharing options...
jimmitchell Posted January 27, 2015 Report Share Posted January 27, 2015 Hi folks Re using Aspen fuel: I am rebuilding an old racing Bantam for fast (!) road work. As it has a fibreglass tank I wanted to stay away from modern fuels so asked Aspen for their recommendation. Their reply was to use Aspen4 (4 stroke mix) 'to give storage stabile fuel and the other benefits, then add 2stroke oil recommended for the Bantam.' Quote Link to comment Share on other sites More sharing options...
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