bull frog gokart

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"

24" 28"

11.5"

24"

12"

26"

12"

4"10.5"

21"

106°

164°

Lower Frame Material1.5" X 1.5" X 1/8" Hollow Square Tube (typ.)

Weld All Joints (typ.)

jmhkarts.com - Bullfrog Kart

Page

Scale: 1" = 1'Drawn: J. Henry

Date: 10/15/03

Lower Frame Layout1

14

Main FrameRail

Rear FrameCross

Side Rail Forward Side Rail

ForwardSide SupportMiddle

Side Support

Rear SideSupport

MainFrameSupports

45°

89-1/2"

Main Frame Rail (2 items)

24"

45° 45°

Rear Frame Cross (1 Item)

21"

Main Frame Supports (3 Items)

12"

45°

Rear Side Support (2 Items)

10-1/2"

24"

45° 82°

29-1/4"

82° 53°

Side Rail (2 Items)

Middle Side Support (2 items)

Forward Side Rail (2 Items)

4"

53°

Forward Side Support (2 Items)

Lower Frame ComponentsNot To Scale


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Date: 10/15/03

Lower Frame Components2

14

26" 24" 44.5"

24" 48" 22"

164°155°

115°

106°

115°

155° 164°

106°

Upper Lower Frame Material1.5" X 1.5" X 1/8" Hollow Square Tube (typ.)

Weld All Joints (typ.)


Page


Date: 10/15/03

Upper Frame Layout3

14

Rear Side Rail

Side Rail

ForwardSide Rail

Rear Cross Rail

Forward Cross Rail

28 - 5/8" 46 - 3/8"

24" 22"

24"

57° 78° 82° 53°

78° 82° 53° 53°

57° 57°

Rear Side Rail (2 Items)Forward Side Rail (2 Items)

Side Rail (2 Items) Forward Cross Rail (1 Item)

Rear Cross Rail (1 Item)

Upper Frame ComponentsNot To Scale


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Date: 10/15/03

Upper Frame Components4

14

2"

4"

2.-3/4"

1/4"

1"

1"

Dia. = 7/8" R= 1/2"

2"

4"

Spindle CradleSpindle Cradle - End View

Spindle Cradle - Side View

Spindle Cradle - Top View

Perspective View

3"

3"

1-1/2"

34"

85° 85°

34"

Axle Beam - Top View

Axle Beam - Front View

Axle Beam - End View

Axle Beam - Perspective view

Front Axle Beam 3" X 1 -1/2" X 1/8"Mild Steel Rectangular Hollow Tube

See Spindle Cradle DetailTop

Bottom

See Note

Note:

The axle beam angles and the spindlecradle details provided here are onlyto be used if you are using the EZ-GOGolf Cart spindle and hub assembly.You will have to make adjustmentson the axle beam to best suit thespindle and hub assembly you chooseto use.


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Date: 10/15/03

Front Axle/ Spindle Cradle Detail5

14

Spindle Cradle Detail (see note)

Axle Beam Detail

Front Axle BeamBottom Flush WithBottom Of Frame

Lower frame

5"

5"

17"

34"

Lower Frame

Axle Beam

Weld all Sides (Typ.)


Page


Date: 10/15/03

Axle Beam Placement6

14

18"

81°

10-1/2"

81°

2-11/16"14-7/8"

45°45° 81°

Rear Upright Supports(2 Items)

Middle Upright Supports(2 Items)

Middle Upright Bracing(2 Items)

Forward Upright Support(2 Items)

Placement of Upright Supports on Lower Frame

Axle Beam

Front Axle Beam

Rear Upright Support

Middle Upright Support

Forward Upright SupportMiddle Upright Bracing

Upper frame

Lower frame


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Date: 10/15/03

Upright Supports7

14

Lower frame Front Axle BeamBottom Flush WithBottom Of Frame

6"

16"

11-5/8"

97°97°

Rack and Pinion Mount Bars (2)

Note 2:The placement of these Rack and PinionMounts are based on the recommendedHyundai Excel Non Power Assisted Rackand Pinion. Placement will have to be de-termined by the builder for any other substituted rack and pinion solution.

Fully weld to frame (typ)

24-1/2"

Important:Do not weld these pieces in atthis time if you plan on using theadjustable motor mount. Pleaserefer to the motor mount drawing.

8-1/2"

8-1/2"

Engine Mount Rails (2)

Note 1:The placement of these engine mount railsare for use with the adjustable engine mountset up and are subject to change for your specific engine and drive system set up.

See Note 2

See Note 1

See Note 1


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Date: 10/15/03

R& P and Engine Rails (optional)8

14

Material:Approx. 50" of 1.25"X1.25"X1/8" Square Steel Tube

46"

45"

R=4" @ Centerline(Typ.)

1.25"X 0.95" Mild Steel Tubing

1.25"

46"41.3/8"

4.625"

35-3/4"

43-3/4"

1.25"X 0.95" Mild Steel Tubing

Main Roll Bar Hoop Front ViewMain Roll Bar Hoop Side View

Middle Lower Cross Bar All roll bar material is 1.25"o.d.x095" Mild Steelnotch to fit with an angle grinder and file.Notch ends with a tube notcher or test fit and their final positions.and notch ends only after test fitting parts intothan indicated on plans during fabrication. CutLeave the ends indicated approx. 1/2" longer

Tubing

Notes:

See Note

22" To Center of Cross Bar

See Cross Bar Below


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Date: 10/15/03

Main Roll Bar Hoop9

14

142°

124°

30-1/2"

43-3/4"

3-1/2"

R=4"

R=4"

81°

7-1/2"

27-5/8"

R=4"

124°

21-1/2"

See Note

See Note

Notes:

Leave the ends indicated approx. 1-2 Inches longerthan indicated on plans during fabrication. Cutand notch ends only after test fitting parts intotheir 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 SteelTubing

22"

32"

20"

Rear Cross Bar

Middle Overhead Cross Bar

Front Cross Bar

See Note

See Note

See Note


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Date: 10/15/03

Roll Bar Components10

14

12-1/2"

26-5/8"7-1/2"

5"

30"

Rear Cross Bar

Middle Overhead Cross Bar

Front Cross Bar

Lower Frame

upper frame

22"

Middle Lower Cross Bar


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Date: 10/15/03

Side Roll Bar Placement11

14

Main Roll Bar Hoop

Rear Cross BarMiddle Overhead Cross Bar

Front Cross Bar


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Date: 10/15/03

Overhead Roll Bar Placement12

14

Lower frame Front Axle BeamBottom Flush WithBottom Of Frame

Lower Frame

Axle Beam

Jack Shaft BearingHeavy Duty Self LockingPillow Block Bearing - 3/4" I.D.

Main Axle BearingHeavy Duty Self LockingPillow Block Bearing - 1" I.D.

42" Flexpruf Steel AxleStandard 2" ends Stepped

to 3/4" Threaded end. 42" overall length

11"

13" SteelJack Shaft

4-1/2"

8-1/2"

8-1/2"


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Date: 10/15/03

Jack Shaft Layout13

14


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Date: 10/15/03

Chain Tensioner Details14

14

bull frog gokart

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