The first ring has an engraved "R" and a taper towards the inside. The second ring is straight without stamping. "Examining the piston kit to be incorporated in the above set, both rings have an engraved mark of R. I got the answer" It's okay to incorporate it either upside down or downwards ", but the piston rings each have a purpose and shape Are different. I incorporated it and worked, but I am worried about the remaining life. I will understand the result from now, but considering the price, I am satisfied if it can ride about 5,000 km.
As it is quality made abroad again, I think that it would be better to do chamfering of cylinder / piston deburring. I can not trust the accuracy of the clearance, so I think whether it is better not to take out hands if you can not set the cab, as to whether you should do a break-in driving.
Main cleaner 85 # with air cleaner opening area being doubled and in use. Running with the combination of high speed pulley and racing CDI has become quite satisfying. (Personal subjectivity) We used carefully gentle mixing of 20: 1 to 25: 1 for the break-in. I have used it for about two and a half but it is not broken. This time I purchased the same item as spare parts. The fuel economy ranges from 36 to 40 km / l and about twice the live Dio.