Introduction; Power Assistant System - Youin BK3000 Manual De Usuario

4. Fit
of the seat post through the bottom of the interrupted seat tube with the tip of
your finger without inserting your finger beyond its first knuckle (see fig. 4), the
seat post may break, which could cause you to lose control and fall.
fig. 3 fig. 4
2. Front and back adjustment. The saddle can be adjusted forward or back to
help you get the optimal position on the bike.

5. Introduction

5.1 Power Assistant System

This is a power assistant bicycle. It equips 1:1 speed type power assistant transducer
to control the rotation of power system.
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