ST3 Two Seater Buggy Plans

SKU: Buggy1005 Category:



Fabrication Skills Rating: 2-3
Cost To Build Rating: 2-3

ST3 is two plans in one!  You get to choose if you want to build a 2 seat or 1 seat buggy.  We provide you with ST3 Chassis plans AND ST2-LT full plans, all in one package.

ST3 features a long travel double a-arm suspension using Fox Air Shocks, both front and rear.  We have done all of the engineering and geometry calculations to ensure your suspension, steering and driveline will function correctly and reliably for years.

We designed our ST3 off road vehicle to be simple for you to build at home using your own welder, tube bender and fabrication tools.  ST3/ST2-LT fabrication plans are laid out in a logical step-by-step format.  We explain all the necessary fabrication steps that you need to do to successfully construct this superb off road vehicle. Our fabrication plans include both metric and imperial measurements in millimeters and inches.  We show you how to cut and bend individual tubes, how to prepare the ends of tubes to accurately fit together, then how to weld individual tubes into an overall chassis frame.  Our fabrication plans also include measured fabrication and machining drawings for constructing the entire front and rear suspension systems including detailed parts lists for all the parts you need to purchase.  We also show you how to build the robust rack and pinion steering system.

You can purchase and install a variety of motorcycle engines.  We do not show you how to install the engine, as every engine has different mounting points, however, we have designed the engine compartment of ST3/ST2-LT to accept just about any size of motorcycle engine.

We have included files so you can have some parts precision laser cut.  DXF files are two dimensional CAD (computer aided design) patterns that all laser cutting shops use worldwide to create precision laser cut steel plates.  This saves you time and money.  Your local laser cutting shop does not have to redraw any parts.  You simply give them the DXF files supplied with your fabrication package and they can reproduce exact parts for you. All our flat steel plates are designed to be self-jigging.  We have designed slots with mating tabs in our steel plates so they fit precisely together.  There is no guessing how parts fit together, as we have done all the hard work for you. We also provide you with information on where you can purchase all of the bolt-on parts you will need.

ST3 Fabrication Plans Package includes:

16 pages of ST3 Two Seat Chassis Plans PLUS 90 pages of ST2-LT One Seat Full Buggy Plans.  All parts are interchangeable from ST3 to ST2-LT.  The ST2-LT Instruction Manual includes measured drawings in PDF format. Approximately twenty 3D CAD renderings for you to visualize how the final buggy will look after you have finished fabrication.

ST3 Safety:

Design includes mounts for 5 point racing harnesses (driver & passenger), racing certified polyethylene bucket seats, foot controls, single rear disc brake, professionally designed roll cage & chassis system.

ST3 Handling:

Rack & pinion steering system, adjustable camber angles in front suspension/steering, built-in castor angle in steering system (self-centering steering), Up to 14″ of wheel travel at all corners, double a-arm suspension all around, fully adjustable & tunable Fox 2.0 series air shocks (rebuildable & tunable dampening), lightweight tubular steel chassis design @ approx 200 lbs (ie: lightweight means improved power-to-weight ratio & improved handling/cornering). Overall vehicle will weigh approximately 800 lbs with engine installed.

ST3 Ease of Fabrication:

Over 100 pages total of ST3/ST2-LT fabrication manuals include step-by-step progressive fabrication drawings with sub-assemblies, weldments, bending details, flat plate details, etc… Basically, you start at the beginning of the plans & work your way through step-by-step. Every drawing has a parts/materials list (where applicable). Chassis drawings show you how to start by making a square tube base frame then progressively build upon that starting point. All materials are readily available worldwide.

Fabrication Skills Rating:
Rating 1-2 = Beginner
Rating 2-3 = Intermediate
Rating 3-4 = Experienced
Rating 4-5 = Expert

Cost to Build Rating:
Rating 1-2 = Low $500/High $2,000+
Rating 2-3 = Low $1,000/High $3,500+
Rating 3-4 = Low $3,500/High $7,500+
Rating 4-5 = Low $7,500/High $15,000+

ST4 Specifications:
Wheelbase = 90″ (2250mm)
Overall Length = 120″ (3050mm)
Overall Width = 66″ (1680mm)
Overall Height = 58″ (1473mm)
Seating = Two (2) persons
Estimated Weight = 800 lbs (360 kg)
Ground Clearance = 15.5″ (394mm)
Suspension Travel (Front) = up to 14″ (up to 356mm)
Suspension Travel (Rear) = up to 14″ (up to 356mm)
Steering Type = Rack & Pinion with steering wheel disconnect
Brake System (Front) = None
Brake System (Rear) = Single Hydraulic Disc Brake
Engine Type = 600cc+ Motorcycle Engine
Drivetrain = U-Joint drive shafts
Differential = none
Reverse = none

Digital Delivery of Fabrication Plans:

After you complete your purchase through our website check out, an automatic download now link will pop up. Click on it to download your digital file.  We do not mail paper copies.  You are purchasing a digital file.  




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