Data wrote:Not trying to start an oil thread, but if you want you engine to go and go I would suggest using a fully syn oil. There is a difference and many advantages. On a 125, the cost is not an issue as there is so little of it. These 125's work hard revving very high and the oil gets very very hot. Cheap lower grade mineral and many semi oils 'damage' very easily. They 'shred' their molecular chains very early and of course never recover, just allowing much more engine wear to take hold, which in turn makes the engine run even hotter. It was driven home to me last year when we were benching some engines on different oils. We called in the oil boffins for help solving particular wear patterns and we solved it by using a particular fully syn oil, which incidentally gave us between 5-6% more power at fully throttle due to less friction. Fully syn reduces wear to virtually zero in mostly all engines. Just my two pence worth...

cheers for that Data, so in the kit he proposes to buy, it is Castrol Power 1 Racing 4T 10W30 Fully Synthetic Motorcycle Oil - 1 Litre
so he should be ok
Fully Synthetic 4-stroke engine oil with Trizone Technology, exceeds JASO MA-2 and API SJ.
Castrol Motorcycle Engine Oil Product Features.
* Fully synthetic 4-stroke motorcycle engine oil
* Trizone Technology
* Tested to the extreme of temperature and engine conditions
* Extreme high temperature air-cooled and water-cooled
engine performance.
* Enhanced throttle response for faster acceleration
* Excellent high speed oil consumption control and volatility
* Excellent shear stability to prevent viscosity break down
* Complies with requirements of catalyst equipped engines.
Ultimate Performance for Extreme Riding on road and track
* Castrol Power 1 Racing is a FULLY SYNTHETIC 4-stroke engine oil for Sport, Super Sport and Race Replica motorcycles from leading European and Japanese manufacturers.
* 10W-30 and 10W-40 variants are aimed at latest Japanese models.
* Castrol Power 1 Racing employs the very latest Trizone Technology that gives optimum protection to the engine, clutch and gears even under the most arduous conditions, including sustained operations at high rpm.
Increased Acceleration
Castrol Power 1 Racing , with its low friction formulation, has been shown to improve acceleration from rest to max speed by up to 6.5% compared to conventional engine oils, which potentially translates into an advantage of up to 5 bike lengths over 1.8 km distance as shown in the graph below.
Castrol Oil is used by customers of leading motorcycle manufacturers like Aprilia, BMW, Cagiva Mito, Ducati, Indian Chief, Kawasaki, Honda, Harley Davidson, Moto Gazzi, Moto Morini, Norton, Royal Enfield, Piaggio, Suzuki, Triumph Thunderbird, Victory, Yamaha all use and most recommend Castrol Motorcycle Engine Oils.