Bull Frog Go Kart Back in 2003 to 2004 J. Henry posted the following plans for free.The plans were on JMHKarts.com which is no longer a valid site. Since they were freely posted before the site shut down, they will have no problems being freely posted now. I have no way to contact the originator of the plans. Enjoy the plans, share the plans, and give a special thanks to J. Henry, whoever and wherever he may be. Jim 89.5" 26" 24" 28" 12" 11.5" Weld All Joints (typ.) Lower Frame Material 1.5" X 1.5" X 1/8" Hollow Square Tube (typ.) 24" 21" 106° 12" 10.5" 164° 4" Lower Frame Layout jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 1 14 89-1/2" 45° Main Frame Rail (2 items) 24" 24" 82° 29-1/4" 45° 45° 45° 82° 53° Rear Frame Cross (1 Item) Side Rail (2 Items) Forward Side Rail (2 Items) 21" 10-1/2" Main Frame Supports (3 Items) Middle Side Support (2 items) Side Rail Forward Side Rail Forward Side Support 4" 45° 53° 12" Main Frame Rail Rear Side Support Middle Side Support Rear Frame Cross Main Frame Supports Rear Side Support (2 Items) Forward Side Support (2 Items) Lower Frame Components Not To Scale Lower Frame Components jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 2 14 26" 24" 44.5" 155° 164° 115° Upper Lower Frame Material 1.5" X 1.5" X 1/8" Hollow Square Tube (typ.) 106° 24" 48" 22" 106° 115° 155° 164° Weld All Joints (typ.) Upper Frame Layout jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 3 14 28 - 5/8" 46 - 3/8" 57° 78° 82° 53° Forward Side Rail (2 Items) Rear Side Rail (2 Items) 24" 22" 78° 82° 53° 53° Side Rail (2 Items) Forward Cross Rail (1 Item) Side Rail 24" Rear Side Rail Forward Side Rail 57° 57° Forward Cross Rail Rear Cross Rail (1 Item) Rear Cross Rail Upper Frame Components Not To Scale Upper Frame Components jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 4 14 Axle Beam Detail Top See Spindle Cradle Detail Bottom Front Axle Beam 3" X 1 -1/2" X 1/8" Mild Steel Rectangular Hollow Tube 34" Axle Beam - Perspective view 1-1/2" Note: The axle beam angles and the spindle cradle details provided here are only to be used if you are using the EZ-GO Golf Cart spindle and hub assembly. You will have to make adjustments on the axle beam to best suit the spindle and hub assembly you choose to use. Axle Beam - Top View 85° 3" See Note 85° 3" Axle Beam - End View 34" Axle Beam - Front View Dia. = 7/8" R= 1/2" 1" Spindle Cradle Detail (see note) 2" 2" 1" 4" Spindle Cradle - Top View Spindle Cradle - End View 2.-3/4" Spindle Cradle Perspective View 4" 1/4" Front Axle/ Spindle Cradle Detail Spindle Cradle - Side View Page jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 5 14 5" 17" 34" Weld all Sides (Typ.) 5" Axle Beam Lower Frame Lower frame Front Axle Beam Bottom Flush With Bottom Of Frame Axle Beam Placement jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 6 14 Upper frame Rear Upright Support Middle Upright Bracing Middle Upright Support Forward Upright Support Lower frame Front Axle Beam 18" 10-1/2" Placement of Upright Supports on Lower Frame 81° 81° Rear Upright Supports (2 Items) Middle Upright Supports (2 Items) Axle Beam 14-7/8" 2-11/16" 45° 45° 81° Middle Upright Bracing (2 Items) Forward Upright Support (2 Items) Upright Supports jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 7 14 8-1/2" See Note 1 6" Important: Do not weld these pieces in at this time if you plan on using the adjustable motor mount. Please refer to the motor mount drawing. 16" Fully weld to frame (typ) See Note 2 8-1/2" See Note 1 11-5/8" 24-1/2" Note 1: The placement of these engine mount rails are for use with the adjustable engine mount set up and are subject to change for your specific engine and drive system set up. Note 2: The placement of these Rack and Pinion Mounts are based on the recommended Hyundai Excel Non Power Assisted Rack and Pinion. Placement will have to be determined by the builder for any other substituted rack and pinion solution. 97° 97° Rack and Pinion Mount Bars (2) Engine Mount Rails (2) Lower frame Front Axle Beam Bottom Flush With Bottom Of Frame Material: Approx. 50" of 1.25"X1.25"X1/8" Square Steel Tube R& P and Engine Rails (optional) jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 8 14 35-3/4" 4.625" R=4" @ Centerline (Typ.) 1.25"X 0.95" Mild Steel Tubing See Cross Bar Below 46" 41.3/8" 46" 22" To Center of Cross Bar 1.25" 45" Main Roll Bar Hoop Front View Notes: Main Roll Bar Hoop Side View 43-3/4" See Note 1.25"X 0.95" Mild Steel Tubing Middle Lower Cross Bar Leave the ends indicated approx. 1/2" longer than indicated on plans during fabrication. Cut and notch ends only after test fitting parts into their final positions. Notch ends with a tube notcher or test fit and notch to fit with an angle grinder and file. All roll bar material is 1.25"o.d.x095" Mild Steel Tubing Main Roll Bar Hoop jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 9 14 30-1/2" R=4" See Note 27-5/8" 142° 43-3/4" R=4" 7-1/2" 81° R=4" See Note 22" 21-1/2" Rear Cross Bar See Note 124° 3-1/2" 32" 124° Middle Overhead Cross Bar See Note Notes: Leave the ends indicated approx. 1-2 Inches longer than indicated on plans during fabrication. Cut and notch ends only after test fitting parts into their final positions. Notch ends with a tube notcher or test fit and notch to fit with an angle grinder and file. All roll bar material is 1.25"o.d.x095" Mild Steel Tubing 20" Front Cross Bar See Note Roll Bar Components jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 10 14 30" Middle Overhead Cross Bar Rear Cross Bar 7-1/2" Middle Lower Cross Bar 26-5/8" upper frame 12-1/2" 22" Front Cross Bar 5" Lower Frame Side Roll Bar Placement jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 11 14 Main Roll Bar Hoop Rear Cross Bar Middle Overhead Cross Bar Front Cross Bar Overhead Roll Bar Placement jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 12 14 11" 13" Steel Jack Shaft 8-1/2" 4-1/2" 8-1/2" 42" Flexpruf Steel Axle Standard 2" ends Stepped to 3/4" Threaded end. 42" overall length Jack Shaft Bearing Heavy Duty Self Locking Pillow Block Bearing - 3/4" I.D. Axle Beam Lower Frame Main Axle Bearing Heavy Duty Self Locking Pillow Block Bearing - 1" I.D. Lower frame Front Axle Beam Bottom Flush With Bottom Of Frame Jack Shaft Layout jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 13 14 Chain Tensioner Details jmhkarts.com - Bullfrog Kart Scale: 1" = 1' Drawn: J. Henry Date: 10/15/03 Page 14 14