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Honda DOHC Parts

Honda CB550-1100 DOHC Fours

Through a modern lens, it is hard to grasp how truly revolutionary the four-valve, DOHC-4 CB750F was when Honda unleashed it in 1979. While other manufacturers had toyed with the dual-overhead cam concept in a transverse four prior to the now-classic CB, Honda perfected it. This one motorcycle heralded an age of performance innovations that birthed an entire class (pure sport) of modern motorcycles.

In the late 1970s, no one thought a four-cylinder engine could ever compete with bikes like Ducati’s 900SS on the track on in drag-peg canyon twisties. The Duck was made to bank, and its L-twin 67-horsepower engine was so centrally situated that no four-pot could, or would, ever compete with it. In 1979, Honda made everyone eat crow.

The CB750F was not only the equal of the 900SS, it surpassed on-track and in the really real world of the streets. Its chassis was superbly stiff, and its three disc brakes could halt it even at hyper speed. It steered lightly, and its power (75 horses) was on par with the 1000cc bikes the other Japanese manufacturers were turning out. The perfectly square engine (62mm stroke and bore) produced a beautiful marriage between engine width and surface area for its four valves.

The F designation was first placed on the SOHC CB750 in 1975, signifying sport-inspired styling and lighter engine components like the flywheel and crankshaft. With the DOHC, the sport bike was truly born. So complete was its dominance from the time it was introduced, that the DOHC in-line transverse four-cylinder engine still dominates the sport category well into the 21st century.

Honda utilized the DOHC-4 in the CB750K and the CB900F, both of which hit dealer floors in 1979 as well. The K series 750 was a more docile version of the CB750F, without the Super Sport version’s flair for dramatics, but the CB900F was a beast — as in 95 horsepower at the crank and 57 foot pounds of torque, that kind of beast. It sold well, but the CB900F lacked the handling prowess of its little sister. In 1983, though, Honda summoned a demon.

The 110-horsepower CB1100F was a cruise missile. Rarely does the word flickable get used in reference to a better-than-liter-sized bike, but motorcycle journalists of the time used exactly that word to describe the CB1100F, which steered like a bike of half its displacement. Honda achieved this minor miracle by placing the DOHC-4 1100 engine in the previous CB900F frame. It handled magnificently in its new skin, but not perfectly. Care had to be exercised in cornering to keep the tires hooked up with the tarmac, but on exit the CB1100F was in its element. During more subdued riding, its prodigious but flat torque curve meant the rider had no need to fiddle with the shift lever. The 1100F was rideable in almost any gear, at almost any (legal) speed.

The DOHC-4 Hondas were ahead of their time and at the head of the class. The lap times and quarter-mile numbers they produced would be respectable today, but they were ridiculous in their era. Honda had set a bar with these machines that would move only incrementally over the next three-plus decades.

Randakk’s is a superb source for vintage Honda performance parts and components. We proudly stock vintage Honda DOHC-4 engine and carburetor parts, suspension and brake components, electrical parts, filters, grips and various performance and reproduction parts for DOHC-4 Hondas.

Every Honda part that you see on Randakk’s is in-stock in our warehouse. Normally, orders ship within 24 hours of completion, and we ship to any of the 50 states and more than 50 countries. Our mission is simple: to help preserve and improve classic Hondas. When you begin your vintage Honda DOHC-4 restoration, Randakk’s has your OEM-style and reproduction Honda parts. Randakk’s is here to provide the maintenance parts your Honda needs. Mile after mile, we’re in it for the long haul. 

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  1. Standard Float Post Repair Kit  - Version D - Additional Float Pivot Posts (DOHC-4)
    Part #
    100-1120
    Also available: Deluxe Float Post Repair Kit for GL1000 carbs. Testimonials: "Hi Randall, I have installed the CBX float pivot post repair kit you sent; nice easy fix & all well. Many thanks for a great product. Best. " Dave Hallam - Auckland New Zealand "Just wanted to say thanks for manufactu... 
  2. Standard Float Post Repair Kit - Version D - Float Pivot Post Repair Kit (DOHC-4)
    Part #
    100-1116
    Also available: Deluxe Float Post Repair Kit for GL1000 carbs. Testimonials: "Hi Randall, I have installed the CBX float pivot post repair kit you sent; nice easy fix & all well. Many thanks for a great product. Best. " Dave Hallam - Auckland New Zealand "Just wanted to say thanks for manufactu... 
  3.  Standard Oil Filter Conversion Kit
    Part #
    100-1151
    This well-engineered conversion kit allows the use of auto spin-on oil filters and makes oil changing a joy! Beautifully crafted by Huntech. Say good-bye to the messy OEM oil filter canister and cartridge. One less excuse not to change your oil! Filter sold separately - be sure to purchase a supply of these when you... 
  4. Upgraded Front Master Cylinder - Version B - 14mm Piston
    Part #
    100-1166
    A and B Versions now available to fit a wide range of motorcycles: Front Master Cylinder VersionFitment Chart Summary of Models CoveredA - 5/8 inch PistonTypical model coverage: Appropriate for most motorcycles with two (2) front brake rotors:Honda GL1000 Honda GL1100 Honda DOHC4 models Honda CBXB - 14 mm PistonTypical... 
  5. Float Pin Removal Tool
    Part #
    100-1147
    Another Randakk Exclusive! This clever tool helps remove stubborn float pins with less risk of breaking the float pin posts (stanchions), so you won??t need one of my float post repair kits! Created by my friend Bob Hagerman, these tools are made of hardened steel and will last a lifetime. Randakk's Float Pi... 
  6. Carburetor Holders - DOHC-4 - Pkg 4
    Part #
    100-1159
    Tired of wrestling with decades old, hard-as-a-rock intake rubber boots (aka "carb holders") when you remove/install your DOHC-4 carbs? Do you fear this gruesome task and worry about damaging your carefully rebuilt carbs? If so, here is the answer. These high quality reproduction intake rubbers for DOHC-4 models are m... 
  7. Dyna 2000 w/Coils DDK1-5C CB750/900/1000/1100
    Part #
    DYDDK1-5C
    The Dyna 2000 electronic ignition kit with coils for 1979 to 1983 Honda CB750- CB900- & CB1100 4 cylinder motorcycles is a microprocessor controlled ignition with adjustable dual crank sensors. This system provides simple switch settings to control multiple ignition advance or retard modes and rev limits. NEW: Dynatek... 
  8. High Performance Fuel Filter
    Part #
    100-1149
    Filter Testing at Virginia International Raceway on RC-003 Filter Inlet/Outlet Size Filter Fitment Models 1/4 inch All Honda GL1000s All Honda GL1100s Honda GL1200: All '84-'85 models and most '86 models depending on original market destination. Early DOHC-4 models. Early CBX models. Any other c... 
  9. Honda DOHC-4- Randakk Master Carb Overhaul Kit® Version B
    Part #
    100-1224
    Randakk Master Carb Overhaul Kit for Honda DOHC - 4 Models WORLD'S BEST DOHC - 4 KIT! Version Models Year Version A DOHC - 4 Master Carb Overhaul Kit CB 750 K CB 750 F Supersport CB 750 L LTD '79 '79 '79 Version B DOHC - 4 Master Carb Overhaul K... 
  10. Randakk's DOHC Four Master Carb Overhaul Kit
    Part #
    100-1223
    Randakk Master Carb Overhaul Kit? for Honda DOHC - 4 Models WORLD'S BEST DOHC - 4 KIT! Version Models Year Version A DOHC - 4 Master Carb Overhaul Kit CB 750 K CB 750 F Supersport CB 750 L LTD '79 '79 '79 Version B DOHC - 4 Master Carb Overhaul Kit... 
  11.  Randakk's Upgraded Front Master Cylinder
    Part #
    100-1167
    A and B Versions now available to fit a wide range of motorcycles: Front Master Cylinder VersionFitment Chart Summary of Models CoveredA - 5/8 inch PistonTypical model coverage: Appropriate for most motorcycles with two (2) front brake rotors:Honda GL1000 Honda GL1100 Honda DOHC4 models Honda CBXB - 14 mm PistonTypical... 
  12. Oil Filter Kawasaki Honda KZ1000 KZ650 CB900 CB750
    Part #
    BAHF401
    HF401 Hi-Flo Brand. Equivalent to OEM: 15412-300-024 15410-422-000 15410-426-000 15410-426-010 16099-003. Equivalent to 10-20300Fits Honda CB350F CB400F CB500 Four CB550K/F/SC CB650/C/SC CB750K/F/A/L/C/SC CB900C/F GL1000/L CBX1050 GL1100/A/I CB1000C CB1100F GL1200/A/I/L/SE Fits Kawasaki EL250-B2/B3 (Eliminator) (... 
  13. Randakk's Gen II Amazing Grips
    Part #
    100-1181
    If you favor chrome and foam grips with tassels, read no further - these are not for you. But if you're a serious rider, these are simply the best grips available. Great for discriminating riders of any motorcycle with 7/8" bars requiring "standard" length grips: 5" - 5 1/2"Developed for experienced riders wh... 
  14. High Performance Fuel Filter - 5/16 Inch Inlet/Outlet
    Part #
    100-1150
    Filter Testing at Virginia International Raceway on RC-003 Filter Inlet/Outlet Size Filter Fitment Models 1/4 inch All Honda GL1000s All Honda GL1100s Honda GL1200: All '84-'85 models and most '86 models depending on original market destination. Early DOHC-4 models. Early CBX models. Any other c... 
  15. Honda DOHC-4 - Randakk Master Carb Overhaul Kit® Version D
    Part #
    100-1226
    Randakk Master Carb Overhaul Kit for Honda DOHC - 4 Models WORLD'S BEST DOHC - 4 KIT! Version Models Year Version A DOHC - 4 Master Carb Overhaul Kit CB 750 K CB 750 F Supersport CB 750 L LTD '79 '79 '79 Version B DOHC - 4 Master Carb Overhaul K... 
  16. Honda DOHC-4- Randakk Master Carb Overhaul Kit® Version C
    Part #
    100-1225
    Randakk Master Carb Overhaul Kit for Honda DOHC - 4 Models WORLD'S BEST DOHC - 4 KIT! Version Models Year Version A DOHC - 4 Master Carb Overhaul Kit CB 750 K CB 750 F Supersport CB 750 L LTD '79 '79 '79 Version B DOHC - 4 Master Carb Overhaul K... 
  17. DOHC Four Float Bowl Gaskets
    Part #
    100-1204
    Highest quality DOHC - 4 Float Bowl Gasket Set DOHC - 4 Float Bowl Gaskets - Set of 4 Fits all the DOHC models listed here.Constructed of superior Viton material to resist the components of modern gasoline.Randakk exclusive - I also include the very necessary accelerator pump passage oring (5.0 x 1.3 mm - Viton) wit... 
  18. DOHC Float Pins - Honda
    Part #
    100-1205
    RANDAKK EXCLUSIVE!!! IMPOSSIBLE TO FIND ANYWHERE ELSE, FROM ANYBODY, AT ANY PRICE UNTIL NOW...THESE ARE NEW! Up until now, float pins have been available only from Honda as part of a "Float Set" which includes the float. The Honda part number for the DOHC float set is: 16013-679-005 which currently lists... 
  19. Valve Bucket- Shim Under- CB750 CB900 CB1100
    Part #
    KI30-1020
    Valve Bucket shim under Bucket Style - Honda Fits Honda CB750C/F/K/SC 1979-83 DOHC CB900F CB1000F CB1100F 1980-83 Requires use of Kibblewhite valve spring retainers. Ensures shims cannot come out at high RPM or with high-lift cams. Keywords: tappet 
  20. JIS Screwdrivers - Set of Three #1- #2- #3
    Part #
    JF002
    Set of three high quality JIS Screwdrivers - Chrome Vanadium with Magnetic tips. Guaranteed for life. #1- #2 & #3 sizes. "full tang" - meaning that they are a one piece shaft from tip to tip with a hex bolster end. Every screw on every Japanese designed motorcycle from the 1950s right up to the newest bikes in th... 
  21. Valve Cover Seal - Honda CB750 CB900 CB1100 - Pgk 8
    Part #
    200-1601
    Valve Cover Seal - CB750 CB900 CB1100 DOHC 1979-1983 - Pgk 8 Equivalent to OEM 90541-425-000 Made in Japan Fits: 1979 CB750L A 1980 CB650 A 1980 CB750F A - 750 SUPER SPORT 1980 CB750K A - 750 FOUR K 1980 CB900C A - 900 CUSTOM 1980 CB650C A - 650 CUSTOM 1980 CB750C A - 750 CUSTOM 1981 CB650 A 1981... 
  22. O-Ring - Camshaft Holder - CB750 CB900 CB1000 CB1100
    Part #
    200-1605
    O-Ring - Camshaft Holder - Honda CB750 CB900 CB1000 CB1100 Equivalent to OEM 91311-425-000 Made in Japan 
  23. Cylinder Head Rubber Seal CB750 CB650 CB550 CB500 - Pkg 6
    Part #
    200-1600
    Cylinder Head Rubber Seal - Pkg 6 Equivalent to OEM 91318-300-013 Made in Japan Honda Cylinder Head Rubber Seal 25mm diameter. Fits Honda CB500/K1/K2 Four Cylinder CB550K/K1/F CB650 1979-1982 CB750 1969-1978 
  24. Crank Trigger - Dynatek 2000 - CB750 - CB900 - CB1000 - CB1100
    Part #
    DYDCT1-5A
    Dyna 2000 Crank Trigger for DDK1-5C CB750/900/1000/1100 
  25. Gasket - Connecting Exhaust Muffler - CB400T CX500 CX650 CB750SC
    Part #
    KL16-5566-1
    42.8 x 48.6 x 20mm exhaust gasket.  Equivalent to OEM 18391-413-000 18392-MG7-750 Fits Honda CB400/CM400 1978-1981 CB450/CM450 1982-1985 CX500 1978-1979 CX500D 1979-1981 CX500TC 1982 CB550SC 1983 CB650SC 1983-1985 CX650 1983 GL650 1983 CB700SC 1984-1986 VT1100C 1987-2007 
  26. Fork Seal & Wiper Kit - CX500 GL500 CB650 CB750 CBX - XS400
    Part #
    AB56-115
    Fork Seal & Dust Seal Kit BMW K1200 GT 01-04, K1200 RS 96-05, K1200LT 97-08, K1200RS 96-04, R1100GS 94-99, R1100R/RT 94-00, R1100RS 92-01, R1100S 97-04, R1150 ADV 01-05, R1150GS 98-03, R1150R 00-06, R1150R Rockster 02-05, R1150RS 00-04, R1150RT 00-06, R1200C/CL 96-05, R1200RT 10-14, R850R 94-01, R900RT 05-10, H... 
    • Out of stock
  27. Fuel Line clear 1/8" ID 1/4" OD
    Part #
    200-1800
    Motion Pro Clear Fuel Line - 1/8" Internal Diameter- 1/4" Outside Diameter. 25 foot Roll.  This hose can be used for float bowl overflow hose, carb sync gauge hose or petcock vacuum hose. 
  28. Wheel Bearing/Drive Flange Seal CBX CB900/750/500
    Part #
    100-1640
    70 x 94 x 6 Seal - equivalent to OEM 91265-463-003 Final Drive Seal - the large seal that goes in the Left Side Gear Case CoverFit GL1100 and CB900C 
  29. Valve Cover Gasket CB750 CB900 CB1000 CB1100
    Part #
    201-0101
    Rubber valve cover gasket for the CB750 1979-1983 CB900 1980-1982 CB1000 1983 CB1100 1983 Equivalent to: 12391-425-000 12391-425-010 Made in Japan 
    • Out of stock
  30. Starter Clutch Kit - KZ650 KZ750 KZ1300 - CX500 CB750 - GS750 GS1000
    Part #
    KL20-6433
    Equivalent to OEM: 92122-004 92043-087 92081-110 91101-516-000 28126-415-000 28125-516-030 09261-15001 09440-04015 12633-31000 Starter Clutch Rebuild Kit contains three (3) each of the roller, spring and spring cap. Fits Kawasaki KZ440 1980-1983 EN450 9185-1990 EN500 1990-1996 EX500 1987-1998 KZ650 KZ700 KZ... 
  31. DOHC Four Float Bowl Drain Screws
    Part #
    200-3045
    Float Bowl Drain Screw with o-ring.    Head diameter 6mm                      Thread – M6 x 1.0  Overall Length – 25.5mm with just the thread and taper 19mm Sold individually. Nice brass copy of the screws that fit the following H... 
  32. Fuel Mixture Screw - GL1100 - CX500 - CBX - CB750
    Part #
    KL18-3686
    Fuel Mixture Screw.  Equivalent to OEM 16016-KC2-970 Fits Honda: CB400T (1980-1981) CM400 (1980-1981) CB450 (1982-1986) CM450 (1982-1983) CX500 (1980-1982) FT500 (1982-1983) GL500 (1981-1982) CB650 (1980-1982) CX650 (1983) GL650 (1983) CB750 (1980-1983) CB900 (1980-1982) CB1000 (1983) CBX (19... 
  33. Fork Seal & Wiper Kit VF750 CB900 CB1000 GL1100
    Part #
    AB56-123
    Fork Seal & Dust Seal Kit Fits: Honda CB550SC 83, CB750F Super Sport 81-82, CB750SC 82-83, CB900C 80-82, CBR600F 87-90, CMX450 86-87, CX500TC Turbo 82, CX650T Turbo 83, FT500 Ascot 82-83, GL650 83, VF500C 84-85, VF500F 84-86, VF700C 84, VF700S 84-85, VF750C 82-83, VF750S 82-83, VFR700 Interceptor 86-87, VFR750F 8... 
  34. Wheel Bearing Kit Rr
    Part #
    AB25-1261
    6204-2RS 6304-2RS 30-5210  - 2 wheel bearings and a seal Wheel Bearing Kit Rear Honda CB900C 80-82, CR250 73-76, GL1000 Gold Wing 75-79, GL1000L 76, GL1100 80-82, GL1100A 82, GL1100I 80-82, MR250 76, MT250 74-76, XL250 72-76, XL350 74-78View Technical Documentation 
    • Out of stock
  35. Starter Motor - CB750 - CB900 - CB1100
    Part #
    TU86-4569
    Starter Motor - 4-Brush, permanent magnet Fits Honda: CB750 1979-1983 CB900 1980-1982 CB1000 1983 CB1100 1983 
  36. Clamp - Stainless Steel - 65mm x 9mm
    Part #
    100-1504
    Clamp - Stepless Screw - 65mm x 9mm.  Stainless Steel.  Sold individually.  Equivalent to OEM: 95018-60250 Air Cleaner / Airbox Hose Band The Oetiker Stepless Screw Clamp has a precise tongue-in-groove (stepless) design which provides a smooth inner band circumference with no steps or gaps, guaran... 
  37. Clamps - Stainless Steel - 60mm x 9mm
    Part #
    100-1503
    Clamps - Stepless Screw - 60mm x 9mm.  Stainless Steel.  Sold individually.  Equivalent to OEM: 16219-422-000 95018-54250 - insulator / carb holder band The Oetiker Stepless Screw Clamp has a precise tongue-in-groove (stepless) design which provides a smooth inner band circumference with no s... 
  38. Clamp - Stainless Steel - 50mm x 9mm
    Part #
    100-1502
    Clamp - Stepless Screw - 50mm x 9mm.  Stainless Steel.  Sold individually.  Equivalent to OEM: 16223-KS5-000 - Insulator / Carb Holder Band The Oetiker Stepless Screw Clamp has a precise tongue-in-groove (stepless) design which provides a smooth inner band circumference with no steps or gaps, guar... 
  39. Switch - Oil Pressure - CB750 - CX500 - CBX - GL1000 - GL1100
    Part #
    KL21-1463
    Oil Pressure Switch.  Equivalent to OEM: 37240-P13-013 Fits the following Honda motorycles: CB400 1978-1981 CM400 1979-1981 CX500 1978-1981 GL500 1981 CB550 1976-1978 CB650 1979-1982 CB750 1976-1983 CB900 1980-1982 CBX 1979-1982 GL1000 1976-1979 GL1100 1980-1981 VF1000 1984-1986 
  40. Handlebar Grip Adhesive ThreeBond Griplock Glue
    Part #
    TU53-0427
    1oz tube - use this ThreeBond adhesive to ensure your grips do not twist or slip on the handlebars. Keyword: TB1501C Glue 
  41. NGK Spark Plug Cap 12mm & 10mm 102 degree XD05F
    Part #
    TU38-1006
    NGK Stock Number 8072, XD05F Black NGK 5k ohm resistor plug cap. 102 degree elbow, long style - for 12mm or 10mm thread spark plugs with terminal stud. Rubber waterproof boot to seal out the elements.   Please note - some models take two types of plug caps.  The following table shows what was fitted to your... 
  42. NGK Spark Plug Cap 12mm & 10mm Straight SD05F
    Part #
    TU38-1004
    NGK Stock Number 8022, SD05F Black NGK 5k ohm resistor plug cap.  Straight - for 12mm or 10mm thread spark plugs with terminal stud. Rubber waterproof boot to seal out the elements.   Please note - some models take two types of plug caps.  The following table shows what was fitted to your motorcycle or... 
  43. NGK 12mm DR8ES Spark Plug
    Part #
    TU38-0068
    OEM: 5423 10% discount on orders of 10 spark plugs or more 12mm thread. NGK plugs provide a reliable spark.  Standard plugs on the following motorcycles: MAKE YEAR ENGINE CLASS MODEL HONDA 1983 1000 CB1000C HONDA 1983 1100 CB1100F HONDA 1982 900 CB900C HONDA 1982 900... 
  44. NGK 12mm DPR8EA-9 Spark Plug
    Part #
    TU38-0065
    OEM: 4929 - do not use with resistor spark plug caps 10% discount on orders of 10 spark plugs or more 12mm thread. NGK resistor plugs provide a reliable spark and contain a 5k ohm resistor to reduce RFI. For a hotter plug use DPR7EA-9, and colder use DPR9EA-9 Standard plugs on the following motorcycles:... 
  45. NGK 12mm DR8ES-L Spark Plug
    Part #
    TU38-0064
    OEM: 2923 10% discount on orders of 10 spark plugs or more 12mm thread. NGK plugs provide a reliable spark.  Standard plusg on the following motorcycles: MAKE YEAR ENGINE CLASS MODEL HONDA 1982 450 CB450SC HONDA 1982 450 CB450T HONDA 1982 650 CB650 HONDA 1982 650 CB... 
  46. NGK 12mm D9EA Spark Plug
    Part #
    TU38-0062
    OEM: 2420 10% discount on orders of 10 spark plugs or more 12mm thread. NGK plugs provide a reliable spark. If you need a hotter running plug select D8EA plugs.  MAKE YEAR ENGINE CLASS MODEL HONDA 1980-1981 900 CB900C HONDA 1981 900 CB900F KAWASAKI 1981-1982 305 KZ305-A... 
  47. NGK 12mm D8EA Spark Plug
    Part #
    TU38-0036
    OEM: 2120 10% discount on orders of 10 spark plugs or more 12mm thread. NGK plugs provide a reliable spark. If you need a hotter running plug select D7EA or a colder running plug select D9EA plugs.  Standard plugs on the following motorcycles: MAKE YEAR ENGINE CLASS MODEL HONDA 1972-1974 3... 
  48. Internal Circlip Pliers Motion Pro
    Part #
    200-1700
    Allows removal of internal snap rings used in hydraulic master cylinders Replaces Honda# 07914-SA50001 Can be used to remove and replace small to medium internal snap rings up to 50 deep- including those used for transmission gear locating- bearing retention- and oil seal retention Applicable to some fork seal retainin... 
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