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GX120 RACE PARTS

(Also see our GX200 Race Parts Page - Most parts will also fit GX120s),

This page has only those parts exclusive to GX120s

 
AIR FILTERS AND KITS
SEE GX200 RACE PARTS - CLICK HERE
BOLT, STUDS, & HARDWARE
Bolt Kit, High Strength Grade 10.9, Includes new high strength bolts and washers for head and side cover. Use only if studs not allowed. 120BOLTKIT $12.00
GX120 Stud Kit, Includes Head Studs, Side Cover Studs, Washers & Nuts, Solid case Dowl Pins, Mandatory for all HP applications (Note. This kit use studs only, no bolts)

120HDSTUDKT $40.00
Stud Kit for Valve Cover VCSTUDKT $10.00
SEE GX200 RACE PARTS FOR ADDITIONAL HARDWARE - CLICK HERE
BEARINGS AND CRANKS
Bearing, Crankshaft (Block & Side Cover), Ceramic Ball & Cage (Special Order)*

7866 $249.00
Bearing, Crankshaft (Block & Side Cover), Ceramic Ball, Chrome Steel Cage, ABEC 7 (Special Order)*

8248 $129.00
Bearing, Crankshaft (Block & Side Cover), Ceramic Ball, SS Cage (Special Order)* 7549 $59.00
Bearing, Crankshaft (Block & Side Cover), Self Aligning (Special Order)*

120SABEAR $30.00
Bearing, Case, GX120, Special Race - loose Free Spinning, These are OEM bearings that have had the Balls and race ground for an extra .001" to .002" clearance. This helps to free up the crank, eliminate any bind, and spin free.   120FREEBEARING $40.00
Camshaft GX120S

Our cams are specially developed for Honda GX engines using flow bench and dyno testing. They are not copies of Briggs (or other) like many of the other cams on the market. All cams can be custom ground for ICL and LS to tailor performance to your specification.

Cams use either Genuine Honda Cores or a Clone core depending on application. Cams 274, 280, 285, 294, and 320 series may require grinding of block to install.

228 SERIES (Cheater Grind).

Cam ground for for classes with lift only rules. Factory lift of .228/.230 with approx 10 degrees more duration. Factory Center Lines.  Near Stock idle. Cam will pass visual inspection but may not pass technical (i.e. profile measurement). 18lb Springs Required.

Camshaft GX120, 228-120  Cam is ground on genuine Honda 120 core ( NRC-228-120 $149.00
230 SERIES

Welded and ground for classes with lift only rules. Approx .230 lift with 30 degree more duration than stock. Significant power increase over stock while maintaining factory lift. Cam may have noticeable idle . Cam will not pass visual inspection. 18lb Springs Required, 26 recommended. Cam is BOLT IN and does not require block modifications yet keeps stock base circle to maintain correct valve train geometry.

Camshaft GX120, 230-0207 SPECIAL HIGH TORQUE GRIND FOR SMALL TRACKS, 5500 rpm, 18 lb Springs Required, 26 recommended. 10 to 1 Compression or higher* NRC-230-0207-120 $149.00
 Camshaft GX120, 230-0607 All around grind for medium to large tracks. 6500 rpm, 26 lb Springs required recommended. 10 to 1 Compression or higher* NRC-230-0607-120 $149.00
 Camshaft GX120, 230-1007 High RPM Grind for Large tracks. 7500+ rpm, 26 lb Springs required  11 to 1 Compression or higher* NRC-230-1007-120 $149.00
 Camshaft GX120, 230-0211 SPECIAL HIGH TORQUE GRIND FOR SMALL TRACKS, 5500 rpm, 18 lb Springs Required, 26 recommended.. 9.5 to 1 Compression or lower* NRC-230-0211-120 $149.00
 Camshaft GX120, 230-0611 All around grind for medium to large tracks. 26 lb, 6000+ RPM S18 lb Springs Required, 26 recommended. 10 to 1 Compression or lower* NRC-230-0611-120 $149.00
252 SERIES

Approx .252 lift and 230 degrees duration (at .050). Welded and ground cam provides significant power improvements over stock cam. Works best with mild motors using bored OEM or aftermarket carbs. Cam is BOLT IN and does not require block modifications yet keeps stock base circle to maintain correct valve train geometry. 26lb springs should be used. Great with 1.3 rockers. Our number one seller.

Camshaft GX120, 252-0207 SPECIAL HIGH TORQUE GRIND FOR SMALL TRACKS, 6000 rpm, 18 lb Springs Required, 26 recommended. 10 to 1 Compression or higher

This is one of the best choices for low end power, esp on small dirt tracks with heavy drivers.

NRC-252-0207-120 $149.00
 Camshaft GX120, 252-0607 All around grind for medium to large tracks. 6500 rpm, 26 lb Springs required recommended. 10 to 1 Compression or higher* NRC-252-0607-120 $149.00
 Camshaft GX120, 252-1007 High RPM Grind for Large tracks. 7500+ rpm, 26 lb Springs required  11 to 1 Compression or higher* NRC-252-1007-120 $149.00
 Camshaft GX120, 252-0211 SPECIAL HIGH TORQUE GRIND FOR SMALL TRACKS, 5500 rpm, 26 lb Springs required recommended. 9.5 to 1 Compression or lower* NRC-252-0211-120 $149.00
 Camshaft GX120, 252-0611 All around grind for medium to large tracks. 26 lb, 6000+ RPM Springs required recommended. 10 to 1 Compression or lower* NRC-252-0611-120 $149.00
 NEW Camshaft GX120, 252-MARINE  Special grind for Marine and Winch Boarding applications. Extreme torque.  Designed for 5000 RPM operation. 18 lb springs will work but 26 lb recommended. 11 to 1 Compression or lower* NRC-252-9911-120-120 $149.00
280 SERIES

The original NR Camshaft GX120. Approx .280 lift  and 220 duration (at .050). This is a nice cam that works well on both stock and modified motors. This cam produces lots of  low end torque. One of the best all around cams we offer. Block must be clearanced to install. Stock base Circle. 26 lb springs required. Bored or Aftermarket carb needed.

Camshaft GX120 280-0207 Serious Torque for Small Tracks 6000 max RPM. 10.5 to 1 compression or more, 26 lb Springs Required NRC-280-0207 $149.00
Camshaft GX120 280-0211 THE ULTIMATE TORQUE CAM, 5500 max RPM. 10.5 to 1 compression or less, 26 lb Springs Required NRC-280-0211 $149.00
Camshaft GX120, 280-0607, Great all around cam for 200s. 6500 RPM.  10.5 to 1 compression or more,  26 lb Springs Required NRC-280-0607 $149.00
Camshaft GX120, 280-0611, Approx .280 lift, 222 Duration,  Great all around cam for 200s. 6500 RPM. Wider power range than 280-0607 with slightly less peak power. Great for Road Racing. Use with stock valve sizes. 10.5 to 1 compression or less26 lb Springs Required.   NRC-280-0611 $149.00
285 SERIES 

Serious Camshaft GX120 for serious motors. Lobe designed esp. for Honda GX series Motors (and clones).  Approx .285 lift  and 250 duration (at .050). Cam allows use of stock valves with 1.2 rocker arms when using our springs. This cam likes big carbs and big ports.  This is the cam we use in our top motors. Best with 24 mm Mikuni, big valves, and high compression. Block must be clearanced to install. Stock base Circle

Camshaft GX120, 285-0607, 7000 RPM. 11.0 to 1 compression or more 26 lb Springs Required, Recommended for most serious GX200s needing good mid range torque. NRC-285-0607 $149.00
Camshaft GX120, 285-1007, 7500+ RPM. 11.0 to 1 compression or more.  26 lb spring required, 30 lb suggested, Recommended for most serious GX200s needing top end power. NRC-285-1007 $149.00
274 SERIES

Radical cam grind . Approx .274 lift and 260 duration. Square lobe design to maximize valve opening time. While meant to use with larger carbs, it actually works very good with smaller carbs by holding open the valve as long as possible with reduced lift to maximize velocity. Block must be clearanced to install. Stock base Circle.

Camshaft GX120 274-0207,  Super High Torque,  Use for small tracks or very heavy driver/karts. Designed for 6500+ RPM, 11 to 1 or higher compression ratio & 26 lb Springs required. DESIGNED TO GET YOU OFF THE CORNERS NRC-F200-0207 $149.00
Camshaft GX120 274-0607,  7500 RPM, 12 to 1 or higher compression ratio required, Small to medium tracks and all road courses, 26 lb Springs Required. Warning - May cause traction problems. NRC-F200 -0607 $149.00
Camshaft GX120 274-1007,  8500+ RPM, 12 to 1 or higher compression ratio required, Recommended for serious competition.  Use for large ovals or where traction is a problem, 26 lb Springs Required NRC-F200-1007 $149.00
Camshaft GX120 274-1407,  9500+ RPM, 12 to 1 or higher compression ratio required, Recommended for serious competition.  This cam is designed for motors running in the 9,000 to 10,000+ RPM range. Dual Springs Required   NRC-F200-1407 $149.00
 NEW Camshaft GX120 274-MARINE,  Special grind for Marine and Winch Boarding applications. Extreme torque.  Designed for 6500+ RPM, 11 to 1 or Lower compression ratio required, 26 lb Springs required   NRC-F200-0211 $149.00
320 SERIES

The biggest wildest cam for GX200s. Approx .320 lift and 260 at .050 duration. Requires dual springs and special attention to the valve train. Block and rod must be clearanced to install. Stock base Circle

Camshaft GX120 320-0807  7500+ RPM, Hottest cam available for GX160/200s. Big Valve and Big Carbs required.  Dual Springs Required, heads will need spring pocket cut. 12 to 1 or higher compression ration required, * NRC-320-0807 $149.00
 NEW Camshaft GX120 320-1207  9000+ RPM, The biggest wildest cam of all.  Big Valves and Big Carbs required.  Dual Springs Required, 13 to 1 or higher compression ration required, NRC-320-1207 $149.00
CARBURETORS, CARB KITS, AND FUEL PARTS
Carburetor, GX120 Bored Out and circuitry reworked* (~15.5 mm). Adds over 1 hp on GX160s. Adjustable jet recommended.

(Bored GX200 carbs are preferred when possible)

 

NR120OSCARB $135.00
SEE GX200 RACE PARTS FOR ADDITIONAL CARBS - CLICK HERE
FLYWHEELS & FANS
Flywheel, Billet Aluminum and Adjustable Timing*

RMALFY $250.00
Flywheel, charging (includes flywheel with magnets and lighting coil)   TO120LCFLY $99.00
GASKETS (See Stock Parts for Additional Gaskets)
Gasket, Head .041 ~ .042 (QMA Legal

 

120HG .041 $18.00
Gasket, Head .038 ~ .040 (not QMA Legal 120HG .038 $18.00
Gasket, Head GX120 1.0 mm (UK Spec) 120HG 1.0 $18.00
Gasket, Head .045 ~ .046 120039 $8.00
HEADS, CYLINDER HONDA -  All heads use Genuine Honda cores

(after ordering, send an e-mail to nrracing@comcast.net with amount to be milled and any special request)

Race Head, Level 1 Cylinder head, Ported and Milled (Choice of .050 or .080), Stock valves (3 angle), 18 or 26 LB Springs, OEM Retainers (REV Kit), New

NRCH120L1 $229.00
Race Head, Level 4 Cylinder head, Oversize SS valves, 26 lb Springs, Ported and Milled to choice of compression ratio,  New NRCH120L4 $249.00
IGNITION AND TIMING
SEE GX200 RACE PARTS FOR TIMING AND IGNITION COMPONENTS - CLICK HERE
PISTON AND RINGS
PUSHRODS
GX120 Pushrods, Chrome Moly, Best Pushrods available, Pair CMPR120 $30.00
GX120 Pushrods, Chrome Moly, .100" Shorter for Roller Rockers, Also recommended for Billet rockers and/or when heads are milled more than .060", Pair CMPR120-100 $30.00
SEE GX200 RACE PARTS FOR ADDITIONAL PUSHRODS/KITS - CLICK HERE
ROCKER ARMS
Rocker Arm, Low Friction with Pivot. These are OEM Rocker Arms and Pivots that have been lapped and treated to reduce friction. Undetectable, each

NRRCKPVT $20.00
SEE GX200 RACE PARTS FOR ROCKER ARMS - CLICK HERE
RODS, CONNECTING
Rod Connecting, GX120 OEM Honda Race Prepped (Not QMA Legal)

120NRRODPR $60.00
Rod Connecting, Billet GX120, 2.874" Long

120ARCROD $79.00
VALVE SPRINGS AND COMPONENTS (including, Retainer Lash Caps and Shims)

 

SEE GX200 RACE PARTS FOR  VALVE SPRINGS AND COMPONENTS - CLICK HERE

VALVES AND COMPONENTS

See Valve Packages for Additional Selections

Valve, Intake, Stainless, Stock Size & Length, Lightweight, High Flow, Hardend tips (Lash caps not required)

VAL120ISS $40.00
Valve, Intake, Stainless, 24 mm, Stock Length, Lightweight, High Flow, Hardend tips (Lash caps not required) - can use existing seat, but must be cut VAL24-120 $16.00
Valve, Exhaust, Stainless, Stock Size & Length, 24 mm, Lightweight, High Flow, Hardend tips (Lash caps not required) VAL120ESS $40.00
SEE GX200 RACE PARTS FOR OTHER VALVES - CLICK HERE
Part/Model numbers are for reference only and are subject to change. Actual part may have a different number, however it will be latest available part and will match description. If you require an exact part number (i.e. for class or rule requirements), please e-mail.

 

Parts Descriptions followed by an * are special order and may take 1 to 2 weeks to get.