HPI Racing - Instructions

Setup Sheets

Kit Instructions/Manuals

Option Parts Instruction Sheets (Electric)

Option Parts Instruction Sheets (Nitro)

Nitro Star Engine Tuning and Assembly Sheets

Instruction Walk-Throughs

Maintainence Tips for your car or truck

Click here for changes to production kits, part replacement policies and more!

Instruction Walk-Throughs

Kits

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Nitro RS4 3 18SS NEW! (pdf - 19MB)

Nitro MT 2 18SS NEW! (pdf - 23MB)

Micro RS4
Walk-Through Instructions for the Micro RS4

RS4 Pro 3

Super Nitro RS4 Rally

Nitro RS4 2 / RTR Nitro RS4 (full assembly instructions)

Electronics

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TX-1 Radio (included with some HPI RTR kits)

Tomahawk Reverse ESC

You may need the Adobe Acrobat Reader to view some of the instructions.

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Option Parts (Electric)

#72490 Micro Dual Link Tie Rod Set Instructions

Page 1 (JPG) Installation of servo on servo plate
Page 2 (JPG) Installation of servo plate and tie rod links

#72450 Micro Ball Diff Instructions

Click here for JPG

#72455 Micro Front One-Way Diff. Instructions

Click here for JPG

Dowload our Micro Tire Choice Guide!

Click here for PDF
Click here for JPG
Wondering when to use what tire? Use this handy guide!

HPI Spring Rate Chart

Spring Rate Chart (Jpeg File) - 372 KB
Color coded for easy identification, this spring rate chart will help you select the right springs for fine-tuning your HPI car! Exclusively for HPI springs, with tuning suggestions for Nitro and electric sedans and Mini cars. The spring rates were determined with the springs compressed 15mm each.

Electric Gear Ratio Chart

Electric Car Gear Ratio Chart (PDF, 92 KB)
For the Pro 3 Gearing and Spring charts, click here! (JPEG image)

The charts print out perfectly on a single page and there are three sets of charts on the page, so you can cut the page into conveniently sized parts and tape them to your tool box, parts tray, setting board, etc.

#A507 Slipper Clutch Set

Slipper Clutch Set (PDF file) - 935 KB

#A297 2 Speed Transmission Set for Pro/Sport/Rally

(GIF image) - 169 KB

(PDF file) - 163 KB

#A508 32T Ball Diff Set for RS4 Mini/Sport/Rally/Sport 2

(JPG image) - 211 KB

#A905 39T Ball Diff Set for RS4 MT

(JPG image) - 263 KB

You may need the Adobe Acrobat Reader to view some of the instructions, click here if you don't have it loaded on your system yet.

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Option Parts (Nitro)

Rotostart

Instructions for Nitro 12 Engines

Instructions for Savage Engines

Savage Monster Truck option gearing chart

#72516 Heavy Duty 2 Speed Transmission
for Nitro RS4, Nitro RS4 2, Nitro RS4 RTR, Nitro Racer, Nitro Racer 2

Page 1
Page 2
Page 3
Page 4

#87032 Reverse Module (Savage)
Exploded view and parts listing

#87150 Dual Disk Brake Set (Savage) -
Adobe .pdf download (2.8MB)

#86038 2 Speed Transmission (Nitro 3) Download the instructions below by right-clicking the links below and choosing "Save As" from the menu. After saving the files, see the instructions above for how to print them to a sheet of paper.

Page 1
Page 2
Page 3
Page 4

Gear Chart NEW - for use with any of the threaded pinion gears (#76977-#72983)

Radio Equpment Information

Warranty Sheet (JPG File) - 262 KB
This is the instruction sheet that comes with each of our RTR (Ready To Run) kits that explains the radio equipment warranty and return information.

#A889 Slide Carb Linkage Set

Instruction Sheet (JPG File) - 270 KB
Use this sheet to assemble the throttle linkage for your slide carb-equipped Nitro car. These instructions are for our #!889 Slide Carb Throttle Linkage Set, but you can use these instructions for any car with a slide carb.

HPI Spring Rate Chart

Spring Rate Chart (Jpeg File) - 372 KB
Color coded for easy identification, this spring rate chart will help you select the right springs for fine-tuning your HPI car! Exclusively for HPI springs, with tuning suggestions for Nitro and electric sedans and Mini cars. The spring rates were determined with the springs compressed 15mm each.

#A912 Nitro MT/Super Nitro Rally 2 Speed

Page One - pilot shaft, engine clutchbell and gear shaft assembly
Page Two - one-way bearing, brake disc and engine installation
Page Three - belt attachment and adjustment instructions
Page Four - gearing and parts list

#A910 Nitro 2 Speed Set

Page One - pilot shaft, engine clutchbell and gear shaft assembly
Page Two - one-way bearing, brake disc and engine installation
Page Three - belt attachment and adjustment instructions
Page Four - gearing and parts list

#A882 Heavy Duty First Gear Adapter for Nitro 2 Speed and Gearing Chart including new Nitro 2 speed clutchbells -

JPG image

#A905 39T Ball Diff Set for Nitro RS4, RTR Nitro RS4, Nitro RS4 Racer, Nitro RS4 2

JPG image

#A885 Nitro Racing Clutch for all Nitro RS4 kits

JPG image

#72230 Nitro MT Slipper Clutch

Instruction Sheet (JPG File) - 216 KB
Use this sheet to assemble the Nitro MT Slipper Clutch.

Nitro Star Engines

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#15201 Nitro Star K4.6

NEW! Nitro Star K4.6 instruction manual (PDF - 2.6MB)

#1617 Nitro Star 18SS

Nitro Star 18SS instruction manual

#1406 Nitro Star S-25

Nitro Star S-25 instruction manual

#1401 Nitro Star 21BB

Nitro Star 21BB instruction manual

#15101 Nitro Star T-15

Nitro Star T-15 instruction manual

#1301 Nitro Star 12R XS with normal crankshaft (#1324 SG shaft is available)

Nitro Star 12R XS Engine Tuning Sheet

Nitro Star 12R XS Exploded View and Parts List

#1626 and #1627 Nitro Star 12R SS

Nitro Star 12R SS Engine Tuning Sheet

Nitro Star 12R SS Exploded View and Parts List

#1623 Nitro Star 12R SC

Nitro Star 12R SC Engine Tuning Sheet

Nitro Star 12R SC Exploded View and Parts List

#1900 Nitro Star Pro 12R RC

Nitro Star Pro 12R RC Nitro Engines Cautions Sheet

Nitro Star Pro 12R RC Engine Tuning Sheet

Nitro Star Pro 12R RC Exploded View, Spec List and Parts List

#1905 Nitro Star Pro 12R SC

Nitro Star Pro 12R SC Nitro Engine Cautions Sheet

Nitro Star Pro 12R SC Engine Tuning Sheet

Nitro Star Pro 12R SC Exploded View, Spec List and Parts List

#1600 & #1601 Nitro Star 15SS

Nitro Star 15SS Engine Tuning Sheet

Nitro Star 15SS Engine Exploded View and Parts List

#1605 & #1606 Nitro Star 15 (ABC)

Nitro Star 15 Engine Tuning Sheet

Nitro Star 15 Engine Exploded View and Parts List

#1610 Nitro Star 15SC

Nitro Star 15SC Engine Tuning Sheet

Nitro Star 15SC Engine Exploded View and Parts List

#1615 Nitro Star 15FE

Nitro Star 15FE Engine Tuning Sheet

Nitro Star 15FE Engine Exploded View and Parts List

Make your 15FE into an ABC engine

#1801 Nitro Star Pro 21R SC

Nitro Star Pro 21R SC Tuning Sheet

Nitro Star Pro 21R SC Exploded View, Spec List and Parts List