pierre66 Posted December 11, 2009 Report Share Posted December 11, 2009 Hi all, just bought my son a ty80 and, as i`m new to these little stinkwheels, i have a couple of questions. i have looked on here for the petroil pre mix ratio and have found 40:1, 50:1 and 66:1, are these measurements in millilitres to litres? if they are i would have thought 25:1 or 35:1 would have been plenty when using modern oils, also, will sae 10 w 40 be ok in the gearbox as i can`t find any sae10 w 30 anywhere? thanks in advance for any help. Pete. Quote Link to comment Share on other sites More sharing options...
b40rt Posted December 11, 2009 Report Share Posted December 11, 2009 40 : 1 etc refers to 1 part of oil to 40 parts of petrol. I don't know the correct ratio for a ty80, but 32 : 1 for bike of this age if its a mineral oil. If its semi synthetic oil 66 : 1 may be suitable, somebody will be along shortly to give you a more precise answer. Quote Link to comment Share on other sites More sharing options...
turps Posted December 11, 2009 Report Share Posted December 11, 2009 I usually use 50 to 1 mix chainsaw oil and have done for many years on various trials bikes. This makes it easy to mix 100ml to 1Litre and I have never had any problems. Hope this helps. Quote Link to comment Share on other sites More sharing options...
feetupfun Posted December 11, 2009 Report Share Posted December 11, 2009 (edited) As far as viscosity goes, SAE 10W40 will be OK in the gearbox. The important thing with gearbox oil in wet clutch bikes is to avoid oils that contain friction modifiers or extreme pressure additives because they will cause the clutch to slip. Edited December 11, 2009 by feetupfun Quote Link to comment Share on other sites More sharing options...
axulsuv Posted December 12, 2009 Report Share Posted December 12, 2009 I run straight 40w oil in my sons ty80 with no clutch or shifting issues . And it runs fine on the same 70 to 1 ave gas and Amsoil Dominator synthetic premix I've been using in my fantic for a few years now . ( and I've forced the ty to take me up some long climbs with no problems pulling my extra weight ... Great little bikes !!!) And as FUF said above , read the label on the gear oil , NO trick slick stuff in the tranny !!! Or you'll be replacing the clutch discs before you know it ... Glenn Quote Link to comment Share on other sites More sharing options...
dougalthedog Posted December 12, 2009 Report Share Posted December 12, 2009 "I usually use 50 to 1 mix chainsaw oil and have done for many years on various trials bikes. This makes it easy to mix 100ml to 1Litre and I have never had any problems. Hope this helps" Hope I'm not being thick but when I was at school 100ml to 1 litre would have been a ratio of 10:1 - surely a 50:1 mix is 20ml per litre !!! Quote Link to comment Share on other sites More sharing options...
montman Posted December 12, 2009 Report Share Posted December 12, 2009 There are 1000mls to a litre and 100cl to a litre surely. So 100ml to '5 litres' is 50:1 Quote Link to comment Share on other sites More sharing options...
spinningplates Posted December 12, 2009 Report Share Posted December 12, 2009 Pierre66 you have a PM Sir Quote Link to comment Share on other sites More sharing options...
pierre66 Posted December 13, 2009 Author Report Share Posted December 13, 2009 (edited) Hi all, thanks for the replies, 100ml of oil to 5 litres of fuel it is then. spinningplates, you should have a pm and thanks for the kind offer. Edited December 13, 2009 by Pierre66 Quote Link to comment Share on other sites More sharing options...
turps Posted December 22, 2009 Report Share Posted December 22, 2009 Hello again I have just been looking through the forum and noticed my mistake, I did mean 100 ml to 5litres it was just a typing error, sorry about that how stupid do I feel ! Merry Christmas Quote Link to comment Share on other sites More sharing options...
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