Flecc this is a common misunderstanding. I have posted before on the subject but perhaps should create a Sparta specific post to cover it (is that allowed?).
There is no need for anyone competent in cycle maintenance to visit a Sparta dealer to fix a puncture: Disconnect the power feed; Remove the wheel; mend the puncture; put it back together.
The wheel nuts should be tightened to 35Nm then 50Nm. The latter happens to be about the same torque most cyclists would tighten a manual bike wheel nut to.
In the rare event that the e-bike does not perform as it did prior to mending the puncture, recalibrate the torque sensor by pressing and holding the light switch until “RECALIBRATED” appears on the Sparta’s display. That’s all there is to it.
The same applies to Kogas fitted with Accell 22Nm, 33Nm 40Nm or 45Nm series motors.
The obvious rule applies: if in doubt ask. If you’re not sure how to remove and replace a bicycle wheel safely call 01728 830 817 (Suffolk) or 0208 960 9848 (London, opening next week).
For those that need help we can make a house call anywhere in the country to carry out this work and are more than happy to talk a customer’s favourite local bike store through the procedure.
By far the best option is to fit Schwalbe Marathon Plus tyres from new. We started fitting these 2008 and have had a total of 3 punctures since (all three the result of 1 inch + long hawthorns through the side wall).
I'm not sure if the cable is the reason, but it's been true with any wheel removal of that motor used in the Sparta and sister bike Koga. At one time 50cycles sold Sparta, then stopped handing them. Subsequently a fire in their warehouse destroyed the kit needed for the Sparta so they were unable to help a local owner who'd bought two Spartas from them.
Justebikes who handle them now claimed in answer to my previously posting this that it was not a problem, but failed to tell me how it was not when I inquired. Therefore the presumption is that it's a problem until we know otherwise with certainty.
Of course in the Sparta homeland of the Netherlands where there are Sparta dealers everywhere, it's not a big problem.
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