Glynny

Thanks guys but how would i go about doing this as im not very mechanical minded ? All the best James

First of all Im new to the forums & Just like to say Hey to every1 who reads this , Now im looking for Someone with a bit of mechanical knowledge, I bought a yamaha dt 125 And the first thing i did was drop the gearbox oil , & put fresh in , But as i took the oil out i noticed something a little out of the ordinery , the oil coming out was GREY! , Now ive seen black and thats when it definatly needs to be changed , & if its a goldie colour its ok !? I may be wrong , Please please please someone help as i am totally lost as to why its this colour All the Best James