- Joined
- Apr 1, 2015
- Messages
- 1,357
- Location
- USA
I had a look into what pistons are in the 15 and the information I got back was the Euro bikes have the two ring SL pistons while the bikes going to the US still have the three ring pistons as in the 14R but have been machined lighter .
Just passing information .
Why is that?
I know the US has strict noise/emissions laws and sometimes US bikes have different ECUs (or programming). But I have never heard of a company using different engine parts for a US bike.
What do they gain/lose by doing that?