HI, Finally joined after lurking for a while as a visitor! I've just bought a Yose 36v. 250w rear motor kit (cassette) and in the process of fitting. I bought the 250w. kit because it had black spokes to match my front wheel. I would have preferred the 350w kit but that has silver spokes. I...
www.pedelecs.co.uk
Read
@Cadence 's thread.
If you want to fully unlock your throttle on your 250w kit, you need to order a new controller from Yose (it comes unlocked, since it fits their 350w kit).
If you also want to increase your top speed setting, you again need to order a new display from Yose - that also comes unlocked.
(According to
@Cadence, read the thread above for more info.)
Now, if you want your bike to remain fully legal, you should probably leave it as is. Although some people point out the throttles are legal up to 15.5mph as long as it only works when you're pedalling.