Installing HS 7G Motor and T-Belt Drive

The main point to installing the HS 142-7G motor kit is to pay close attention to the V-shaped motor mount's reach - especially on a long cruiser or XL bike frame.
Gasbike's kit-provided 49cc motor mount may not be the best part but it will do the job.

HS 49cc motor mount / base plate top view

Mount the 49cc motor to the silver base plate first - using blue thread-locker (short screws).
Be sure the motor is placed / pulled all the way left in the cross slots when looking from the bike's rear axle. Use a ruler to check the chainline / alignment.
V-shaped mounts must be fully extended < fore > to aft.

longer frame w/ max mount extension

The 4 side plate screws should be up against the slot ends; left and right.

On a small frame the HS 49cc motor mount's 4 side screws are close together.







 

 HS 49cc motor on mount / base plate, installed left of center.

Pulley hole - top of pic, carburetor on right

Attach the belt drive base plate with smaller pulley opening to the rear, next to the carburetor.
Use the 4 longer allen screws with washers & blue Locktite. Hard snug, but not super-tight!





 Once you have the Two motor mount V pieces semi-attached to the frame do a trial / test fit of the Engine-on-plate assembly. The engine must be positioned as high as possible so your pedals will clear the side cases. Use tape to mark the V-part ends final mounting points. Snug down the 9/16" V-mount bolts, not using final torque yet.

Note motor plate screws at slot ends

Trans plate installed. Cam plate screw just visible under rotating belt - large pulley.

Remove the motor assy. and install clutch and T belt drive per the video.

When installing the clutch it's round boss MUST face outwards.
The woodruff key must seat all the way down in, near the motor case.
If the clutch drum does not rotate freely with the bronze sleeve attached then it's in (on the crankshaft) backwards / upside down. Fix it.

7G Clutch Bell +Bronze Sleeve.
A few drops of oil on the bushing
will permit easier rolling.

Installing T-Belt Transmission Base Plate
large opening goes next to exhaust side, over the crankshaft.

Tip: the T-Belt Pulley Assy. rotating part should be inserted with the adjustment cam's heavy side down (in neutral). This will allow the J-spanner tool to rotate the pulley slotted cam - rearward to tighten the T-belt just snug (not tight!).

Be sure to use soft 1/2" washers so the 4 allen bolts will secure the cam's four slots to the base plate tightly. Use blue thread-locker.



Fit the cover and you're done! 
Don't forget to add 10W-30 detergent oil up to dipstick mark.
Change oil after the first 10-20 miles, 100-140 miles thereafter.
Over-revving the HS 142 motor will damage it's non-pressurized crank
and con-rod.

HS 142-7G Kit mounted with cover