STEP 4
1)First, lift up the handlebar post tube(10) , then connect the Upper& Lower
computer cable (41 & 88), the upper handle pulse cable(46) with middle handle
pulse cable (47).
2)Insert the handlebar post tube(10) on the main frame(1) and fix it by using 4pcs
spring washer(11),2pcs flat washer(66),4pcs allen bolt(13),2pcs curved washer(31).
3)Assemble the backrest(25) to backrest supporting set(86) by using 4pcs flat
washer(66) and 4pcs allen bolt(15).