Previously on my posting were some suggestions that i've made with regards to improving the performance of your machine.
Yes.. I have tried some of them out and have come out with a fair conclusion. Several items that i would recommend are as follows:
- Air Filter
- ECU
- Hi-Cam
- Exhaust
- Sprocket
Air-filter: By reducing the restriction to the amount of air entering the combustion chamber, one is able to allow a higher ratio of air to fuel thus increasing the horse-power.
ECU: At this point of time, the upgraded ECU that i have came from Hong Leong Yamaha - Moric Racing ECU. It has a fuel cut at approximately 13,000 rpm. It out performs the standard ECU anytime
Hi-Cam: Beware of the racing cams out in the market. Some merely does anything. In-fact by reverting back to the original cam did give me a better top-end. This is because of the higher profile of the cam which disturbs the opening and closing of the valves. Being a single cam engine, the cam adjustment is restricted as both the intake and exhaust profile is on the same shaft. Therefore, advancing the cam opening of the intake would also advance the opening of the exhaust vice-versa.
Exhaust: NoB-1 exhaust did give a sporty look on the bike but sadly didn't do much for the top-end. The original exhaust however do require modification internally to improve the bike's performance. It has several plates in the muffler which zig-zags the flow in it. What i would suggest is to remove the plates and insert a cone funnel narrowing the flow from the inlet of the muffler. The sound coming out of the modified exhaust is still bearable compared to the after market ones.
And finally, the sprocket suitable for a good balance of pick-up and top end would be 15-41. I could not reduce the size further than that. I guess it is due to my 6' height which creates quite an amount of drag while riding. Top speed achievable with this configuration is approximately 150km/h. Bare in mind, the racing ECU i had on my bike does not limit the rpm to 10,500.
Hope the information i have shared would shed some light on those modders out there..
Cheer!
