OPS On-Road Engine Parts

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Carburetor Block O-Rings Set Cone Flywheel Exhaust Header to Pipe Springs
Carburetor Block O-Rings SetCone FlywheelExhaust Header to Pipe Springs

Carburetor Block O-Rings. O-rings that go on base of carburetor all Radical engines 2pcs per package. The thicker o-ring goes in lower slot and thinner goes to upper slot on block.

Replacement Cone Flywheel for Radical 621T, 621P and 628T

Exhaust Header to Pipe Springs 4pcs per package approx 22mm long end to end. These springs used for adjustable pipes.

$2.99

$5.99

$4.99

OPS Engine Case for 14mm Crankshaft OPS Exhaust Spring Set Small 3pcs OPS Next/SFB-21B and Marine Next Engines Rear Crankcase Gasket
OPS Engine Case for 14mm CrankshaftOPS Exhaust Spring Set Small 3pcsOPS Next/SFB-21B and Marine Next Engines Rear Crankcase Gasket

OPS Next Engine case for 14mm crankshafts like the Next On-Road/DAC Out-Board and In-Board Nitro Engines. Engine case does not come with bearings.

OPS/Radical Exhaust Spring Set Small 3pcs

Rear Crankcase Gasket for all Next Nitro Engines including marine in-boards/marine out-boards and SFV-21B Buggy Engines. If you have the Radical line of engines like 621P and 621T use 573120 1pcs per package

$52.00

$4.99

$1.99

OPS On-Road Piston and Sleeve Pre-Next Engines Complete Carb Assembly for All Radical Engines Crankcase Bolts
OPS On-Road Piston and Sleeve Pre-Next EnginesComplete Carb Assembly for All Radical EnginesCrankcase Bolts

OPS On-Road Piston and Sleeve Pre-Next Engines. This p/s is for on-road engines back in the 80's / 90's, special order only!

Complete Carb Assembly for All Radical Engines. Complete with 3 venturies.

Replacement Radical/OPS bolts all 3.5cc and 7.5 marine Nitro Engines 10 per package.

$149.99

$109.90

$59.99

$6.99

Exhaust Gasket (Rubber) Front Crank Bolt Std Thread High Speed Needle for OPS/Radical 3.5cc Nitro Engine
Exhaust Gasket (Rubber)Front Crank Bolt Std ThreadHigh Speed Needle for OPS/Radical 3.5cc Nitro Engine

Replacment red rubber exhaust gasket for all OPS/Radical 3.5cc on-road, off-road and marine Nitro Engines including the Radical 621T, 621P and 628T. OPS/Radical Engines.

Replacment Front Crank Bolt Std Thread. There is 2 bolts per package.High Speed Needle for OPS/Radical 3.5cc Nitro Engine Carburetor's. Fits all 3.5cc carbs. Does not come with o-rings order them separetly.

$5.99

$1.99

$9.99

Main Needle Housing O-Ring Small (2pcs per package) OPS .21 Head Shim
Main Needle HousingO-Ring Small (2pcs per package)OPS .21 Head Shim
Main Needle Housing for Radical carburator. Fits 621T, 621P and 628.O-Ring Small for all carburator needles on all Radical Engines/OPS 3.5cc engines. Package of (2pcs) o-rings per package.Radical 621T and 621P head shim. The shim is .1mm comes 2pcs shim/head gasket per package.

$9.99

$1.89

$1.99

OPS .21 Wrist Pins Clips OPS Ceramic Rear Crankcase Bearing 14mm OPS NEXT 21 On-Road Crankshaft
OPS .21 Wrist Pins ClipsOPS Ceramic Rear Crankcase Bearing 14mmOPS NEXT 21 On-Road Crankshaft

Wrist pins eclips for your Radicals and OPS .21's including marine 3.5. Package 2pcs.

OPS Rear Black Ceramic Bearing for crankcase fits all 3.5cc 14mm cranks. These are the replacement bearings for the NEXT Marine and On-Road Nitro Engines. Bearing is hand made by OPS using the best black ceramic bearings available! Rear crankcase bearing size is 14x25mm . 4x6.

OPS NEXT 21 On-Road Crankshaft completly balanced.

$2.99

$40.50

$99.10

OPS NEXT/DAC 21 Piston and Sleeve OPS Turbo Glow Plug #6 or #7 Heat Range OPS/Radical Carburator Spray Bar
OPS NEXT/DAC 21 Piston and SleeveOPS Turbo Glow Plug #6 or #7 Heat Range OPS/Radical Carburator Spray Bar

OPS Marine/On-Road NEXT/DAC 21 Piston and Sleeve. Check out the porting 7+2. This piston and sleeve is replacement for Next 21 On-Road and Marine Nitro Engines

Original OPS Turbo Glow Plug's Manufactured by OPS in Italy. These are 24ct GOLD Plugs designed for the RADICAL/OPS Turbo Head off-road engines. The #6 Turbo plug is the hottest plug OPS makes. Your choice #6 hot plug or one heat range cooler #7 turbo plug. Top quality last forever!!OPS/Radical Carburator Spray Bar. For all Radical engines.

$107.70

$7.97

$12.99

OPS/Radical Connecting Rod all 3.5cc Engines OPS/Radical Engines Carb Cinch Collar Replacement Crankcase O-Ring Cover Gasket
OPS/Radical Connecting Rod all 3.5cc EnginesOPS/Radical Engines Carb Cinch CollarReplacement Crankcase O-Ring Cover Gasket
Now's the time to change that rod guys. Save you $$'s in the end. Connecting Rod for the Radical 621T, 621P and 628T. Also fits the OPS Track .21 and SFV21B OPS Off-Road. This 60711 rod also fits the Marine .21 with a 6 hole cylinder head bolt pattern.

OPS/Radical and OPS Marine engine cinch collar with allen wrench. Hold's carburetor to block. Includes stainless steel collar, orings, bolt and wrench.

Replacement Crankcase O-Ring Cover Gasket for all 3.5cc OPS/Radical including Radical 621T, 621P and 628T, OPS Track, NEXT and SFV-21B Nitro Engines, one per package.

$38.00

$5.99

$3.99

OPS 3.5cc Replacement Crankshaft OPS Front Crankcase Bearing 3.5cc Replacement Head Bolts
OPS 3.5cc Replacement CrankshaftOPS Front Crankcase Bearing 3.5ccReplacement Head Bolts

Replacement Crankshaft for the Radical 621T, 621P and 628T. Aso same crankshaft for OPS Track .21 and OPS SFV-21B Nitro Engines

Replacement Front Crankcase Bearing for all 3.5cc on and off-road .21 Nitro Engines Size is 19X7X6.

Replacement head bolts for all 3.5cc on and off-road including the Radical 628 package has 8pcs

$91.60

$19.30

$12.90

OPS/Radical Replacement Piston and Sleeve 621P & SFV-21B Standard Plug Head Button All 3.5cc Engines Wrist Pin and 2pcs Clips
OPS/Radical Replacement Piston and Sleeve 621P & SFV-21BStandard Plug Head Button All 3.5cc EnginesWrist Pin and 2pcs Clips
Factory modified replacement Piston and Sleeve for all Radical/OPS SFV-21B On/Off road 3.5cc engines. OEM replacement for Track 21 and Radical/OPS 621P & SFV-21B. Power version of the 621 product line. Note differant porting then the 621T for torque engine.

OPS standard plug head button for all .21 size engines including the Next Marine and On-Road new engines. This standard cylinder head button allows the racer to fine tune the engine to their glow plug preference by offering an optional standard...

Replacement wrist pin and clips for the Radical 621T, 621P, 628T. Includes one pin and two clips.

$129.99

$29.00

$9.25