Hello everyone..Ive been a member of this forum for a little while and been in the background.I have a 2003 Vento Zip that I have done extensive modding to.Nothing like you guys overseas,as we dont get near as much cool stuff as you do.Anyway..I have swapped the stock 50cc motor that I had a DR racing 70cc kit on,for a 1E50FM Linhai Yamaha 90cc motor.I have a MRP 54mm cylinder,MRP 47mm stoker crank,21MM OKO D slide carb,MRP intake manifold,and some other goodies.First question is:Have any of you had any experience with this motor?What will be the best pipe for my setup?And:How can I get stage 6 carried here in the states?Any input about tuning will be well excepted.I look at the site everyday and really look up to all of you for input on tuning,porting,and so on.I have alot of experience in tearing motors down and rebuilding so I should understand just about anything.Again,thanks for you all being really scooter crazy dudes!!!