Originally Posted by rider18
I changed my front and rear sprockets to -1/+2. The acceleration feels great. But I also knew that my speedometer would go off. I had my friend ride at 60mph on his bike next to me, when his showed 60mph, mine showed 67mph.
I wanted to know if getting a speedohealer would be more worth/efficient or getting ECU flash? By the way, would ECU flash solve this issue? If it does I dont mind doing the ECU flash cause there are more benefits to it.
Thank you all in advance.
Speedohealer is what you want.
It's a pretty easy install and very easy to adjust later if you need to change tire sizes or sprockets, etc. I have one on my bike and it works great. There's also a handy "recall" function that will show you your most recent top speed. It can be reset with a push button.
On my bike, I wired the horn relay into a micro relay that accomplishes the "push button" part - so I can push the horn button and see my most recent top speed while riding (hold it for 3 seconds to clear).
If you have a GPS, you can calibrate your bike's speed using that (once you have the speedohealer installed). You can also use the formula they supply and get within 1 MPH +/- per 100 MPH or so.
I definitely would not reflash the ECU. It's much better to get the speedohealer and install it. It's basically a plug and play and then you have a means to adjust from then on.