How about a link???

 

i have found a 13.8 je piston on sparks racing's site. this is also the exhaust im going with this piuston iks specially made for sparks racing by je look into just google or yahoo curtis sparks. i'm new to the atv world but i have and designed racing engines for 6 years now and their exhaust is the beswt i've seen for a one cylinder app. they have to versions reg and big core big core will loose some low end but make up for and then some mid to top.
sorry i havent been able to post lately ive said before i'm very busy.

 

check E BAY for these parts, search 450r piston... they have them all over in all different compression ratios... they have JE and Wiseco , i was going to buy the 13:5:1 Wiseco but didnt last minute dont wanna run race fuel...