1man8scoots wrote:Just to clarify I just put the pg short on a zx50 engine that sees 11,800 rpm with out any issue and I can only spin 9800. 5g rollers and 3 jet sizes smaller. The pg short simply does not make power over 9k. I hear ya that you hit 10,300 rpm at 70 mph on an af16 with gears but we're talking about a zx50 engine that he is trying to do this on.Wheelman-111 wrote:Greetings:
Have to go back and read F3.26 in 2011 or 2012, but I vividly recall seeing 10, 300 on the TinyTach at 70. Tallish 7.57 gears though. Never say "never".
I also use the pg short on a corsa, a mhr, a fabrizi, and a 49cc af16e. Guess which engine it performs best on... wait for it... the stock 49cc! I'm sorry but if it's good on a stock bore it's not good for a kitted engine. I understand it made it to 10,300 but in order to hit 60 on the zx50 engine you need closer to 11k and make great power.
I still stand behind my statement that you will not make it to 60 on a zx50 with a pg short.
Get a Scorpion and never have that feeling of "maybe I should have got the better pipe". I have so many exhaust systems to play with on so many different engines and cylinders I feel I may be right on this one. Especially since I have a corsa powered zx50 with stock gears and have hit 62 on it with a scorpion.
I rarely doubt or second guess any advice from wheelman. Extremely prolific in his endeavors and truly a scooter tuning guru he is.
No doubt both of you are very knowledgeable, I appreciate all input. Apparently porting, jetting, curb weight, altitude and about 100 other things influence how a setup runs. I am just a touch obsessed with getting a scooter to carry me over 60 mph! I have a couple builds on minas that have gotten me fairly close so far, and when I get the time to put my Vento clone back together I will likely reach my goal of 60 mph with it.
I was excited to see the elites with the AF16's going so fast on youtube I decided to to give the AF16 platform a try. I picked up the Kymco ZX on a whim, and have grown to really like it but only recently found out it does not accept the gearing options like the genuine AF16's do.
With that being said I may change my plans. Without much effort, I have my ZX going just over 50 mph so far. I will continue to tweak the setup and likely try the PG short pipe on it (it has a V8 pipe on it ATM) it should be a nice, reliable just under 60 mph scooter. I will take the polini corsa cylinder and the other parts I have amassed and build up the 94 Elite basket case I have. It will take me a while to get it done as I work slow, but I think this is a better plan. There is no doubt in my mind that with the help from this forum, and the right gearing, I will have a 60 mph Elite, possibly even a 70 mph Elite if I have the b***s to go that fast on 10" wheels. Lol!