This pipe with the header pipe lengthened just a bit and fitted similar to how yours is now would stage at around 3800-4200 for a broad 3000 plus band and pull thru a lower ratio while on the pipe making it very streetable!
Silvertop are you sure no other cars were ahead or behind you? I've been befuzzled by those in my car just to check the speedometer and am never sure which car is getting zapped when it's off.
Sorry I don't have a link but it can be found on ebay or alibaba it's for a typhoon scooter and there are many types that will also work! here is Don grubee's its way to long of a header but he say's it works well!