Blue = 1k yellow 1.5k and red 2k . You may want to try a gram heavier in sliders . To truly have it a screamer you would want a 50mm BBK with a big valve head which would have better flow than the stock head like on the top of this page
http://www.scrappydogscooters.com/13...rformance.html
Regardless what you do it will only go so fast and if you push it beyond its limitations expect part failure and shorter engine life . I had a "secret 63 " and put on an Air Sal 50mm BBK which had way more takeoff and uphill but had the same top end just did not have to redline it to do so .
It is much easier to build a small 2T scooter to fast than building a 4T .