1
Distributed exclusively in the USA by: Nationwide Access. www.gasbike.net
PLEASE READ THESE INSTRUCTIONS BEFORE INSTALLATION
www.grubeeinc.com
These
Instructions are Copy Righted:
Rev. Oct 24, 2010
YuanDong
SkyHawk
GT2A
>
48cc / 40mm x 38mm bore and stroke: Center Fire Sq. Head.
GT2B
>
48cc / 40mm x 38mm bore and stroke: Angel Fire Rd. Head.
GT2-SM > 48cc / 40mm x 38mm bore and stroke: Angle Fire Sq. Head;
GT5 > 66cc / 47mm x 38mm bore and stroke: Center Fire Sq. Head;
GT5-SR > 66cc / 47mm x 38mm bore and stroke: Angle Fire Sq. Head;
Kit Box Contents:
2 cycle gas engine with dual needle bearing: Black Catalytic exhaust muffler; Tear Drop 2.5L Fuel Tank
plated inside; Bicycle ½” x 1/8” drive chain; Chain guard; 44 tooth Sprocket with 9 hole mounting
hardware for 36 spoke wheel; Ball bearing chain idler: Push button clutch lever, CNS premium EPA
approved carburetor with external choke control: New design CD Ignition, Twist throttle with integral kill
switch: Tool kit with Extra spark plug; Extra mt. block, Extra head gasket:
To ensure continued engine performance: DO NOT use other than original SkyHawk replacement parts.
Note:
Failing to follow these instructions when installing a certified engine in a piece of non-road
equipment violates Federal Law 40CFR-1068.05 (b) and is subject to fines or other penalties as described in
the Clean Air Act of 1970. Mechanical aptitude and ability is required to perform this installation. Many
“do it yourself” backyard mechanics will find this project rewarding. A love of small engines is the only
required catalyst for this project. However, installation is sometimes best done by a professional auto or
motorcycle mechanic. Frame size should be 28mm to 30mm dia. with 70 degree included V angle. For
sufficient engine clearance select a bike with a seat tube length of at least 12 ½ inches measured between
bottom of top tube and top of pedal sprocket tube. A rewarding joy and challenge is found in designing a
custom installation of your own. Remember, a quality installation is paramount to safe usage and long term
satisfaction. You may find many uses for this engine kit from stationary machine power to off road riding
machines. Have fun and good luck on your motorized project. Happy trails to you from China GAS:
STEP #1 Mounting the Engine:
1.
The engine mounts in a 70 degree angle “Vee” tube frame. It is best to make sure all 4 engine studs are
securely bottomed out in the engine before mounting. Use a Jam nut procedure to tighten.
2.
Consider using Masking or Duct Tape on the front down-tube & seat tube of your bicycle to protect the
paint finish while test fitting the engine to your donor bike. If the distance between the two frame tubes
exceeds the engine mounting span then additional spacers or welded brackets may be required. Mount
the engine to the seat tube first and then fit to the front tube. If frame tube fit is smaller than engine
clamp dia. use strip shims to fit. See figure one for example of installation on a wide frame bike..
GT2A
GT5
GT5-SR
