Although i am only 15, I own a 1977 KE175 and she is great fun to ride around my local footy pitch, only problem is when you try and open her up, she just bogs out and sounds as if the engine is getting too much air!?. I have recently had the engine apart, I have fitted new crank seals, but havenĀ“t been able to start her up because i am in need of a set of piston rings 1.00mm o/s if anyone knows where i can find some cheap, plz can you let me know.