got this from
http://www.scooterpartsexpress.com/c...boy-body-style
This is a quality steering column, Steering Stem/Triple Tree for the Handsome Boy style scooter design. This triple tree base is flat with 2 square uprights on either side of the stem measuring approx. 10mm by 10mm, 15mm high. At the back of the stem, there is a notch cut into the stem, at center, approx. 20mm from the top of the stem. There is no hole at the top of the stem. There is a keyway directly in front running from the top of the stem to just above the threads. There is no slot hole at mid-stem as some steering stems have. There is a 17mm "tongue" on the back lower center of the base with a threaded receiver. Handsome Boy scooters include the Baja BE500, Jonway Lambda, Jonway QT-21, JMstar Z-bike, Longbo LB50QT-22, MotoFino MF50QT-7, Roketa Bahama MC-07-50, Sunl SL50QT-2, Tank Sporty, VIP Future Champion and many others.... The steering stem measurements are as follows:
Base/Triple tree width (outside to outside) 240mm, 24cm, 9 7/16"
Shaft length (top of stem to the top of the base/tree): 340mm, 34cm, 13 3/8"
Diameter of the shaft: Top: 23.2mm, 2.3cm, 29/32" Bottom (above collar): 30mm, 3.0cm, 1 3/16"
Diameter of the (2) /shock/base holes: 29.4mm, 2.94cm, 1 5/32"
Direction of the base/shock bolt flange: Point directly forward (2 bolts each side)
Distance between the base bolt flange (center to center): (2 bolts each side): Top: 163mm, 16.3cm, 6 7/16" Bottom: 159mm, 15.9cm, 6 1/4"
Length of cut-out/notch at top of stem: None
Length of the keyway from the top down to the threads: 47mm, 4.7cm, 1 7/8"
Distance from the top of the stem to the hole in the stem: None
Size of the shaft hole: None
Length from the top of the stem to the beginning of the threads on the shaft: 53.8mm, 5.4cm, 2 1/8"
Length from the top of the stem to the slot on the back left side: None
Length of the slot: None
Width of the slot: None