I have just purchased a Montesa 315 RZ, it seems to be missing a chain tensioner, where can I purchase these from, and are they expensive? There seems to be a bit of play in the brake discs, can this be resolved? What is the correct mixture for the petrol to oil mixture, I was told it is 80:1 with fully synthetic 2 stroke oil, is this right? can anyone advise me which 2 stroke oil to use? and also the recommended gearbox oil, and how often it should be changed. Thanks.
