REVIEW: QR-E 250W ELECTRIC BOOSTER BICYCLE MOTOR AND B60i AND B70 BATTERY

Just got mine today. First impressions are its does what I need to do. However the grip tape i got disintegrated mid ride, is it because I used a low quality one or too much pressure?
 
I forgot to take pics give more details as I was outside

3 km ride with friction tape, half way through i smelled burning or "melting" but thought it was from barbecue from a street parade (it was a coincidence), around 2.5km in i felt that boost was no longer boosting. Upon arriving I checked to see that grip tape was no longer there, with the black paint on the roller being completely worn off. I had applied the friction tape as 1 layer as I wasn't sure how much to apply and side by side.

So Im not sure if its just a bad tape that I got or a bad installation by me

(Also forgive me: I just learned and started my biking journey last month so this is basically my first "mod" to my bike)
 
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