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ATC90 74-78

ATC90 74-78

This section allows you to search for all parts relevant to Honda ATC90 74-78 models


ATC90 , 2nd generation introduced 1974, ends 1978, Features:


  • Model Code for 74-78 models "942 "
  • 4 speed auto clutch transmission High & Low range sub transmission
  • 22x11x3.5 low pressure tyres, (1974) 22x11x8 split rim (1975~)
  • Tyre pressure 0.1 kg/cm2 (1.5 PSI ) 1973. 0.15kg/cm2 (2.2PSI) 1974~
  • Length 1570mm, width 970mm, Height 880mm, Weight 93.5kg
  • Engine bore 50mm, Stoke 45.6mm, CR 7.5:1 Displacement 89.5cc
  • Carb Keihin 556A, main jet #65, slow #35.
  • Engine number located below Hi-Lo range selector.
  • Frame number located on steering head stock left side
  • Engine Oil capacity1.0 ltr
  • Fuel tank capacity 6.5ltr,5.5ltr main and 1.0ltr reserve
  • Point gap 0.3 - 0.4 mm (12 to 16 thou)
  • Plug gap 0.6 - 0.7 mm (24 to 28 thou)
  • Plug NGK D8HS
  • Valve clearance (cold) 0.05mm



This kit contains all the gaskets and "O" Rings required to service your 73-74 ATC70 Carb.Also contains the filter screen components and includes the brass screen which is unavailable as a seperate item. Suits ATC70 73-74, ATC90 all, Also suits CT70 72-76, CT90 69-75, ST90 73-75...
us$35.50
Rear Tank mount rubber, also serves as an anchor point for the front of the seat. This rubber is necessary for correct seat and tank alignment and retention. Suits ATC90 70-78, ATC110 79-80...
us$30.00
This cable suits ATC90 from 70-73, has grey outer sheath, if you require black outer sheath please use TC-942-74 ATC90 70-73...
us$29.00
Steering Stem Bearing ATC70/90/110 | ATC125M |  ATC185/S |  ATC200/E/ES | ATC200M/S
Hot Out Of Stock
Brand: ATC Heaven
If you are in the throes of restoring your ATC, or just going about yearly maintenance you should consider replacing the steering stem bearings. The Original design bearings work OK but these tapered caged bearings are a whole lot better. Improve steering efficiency and make your steering feel like ..
us$59.00
Brand: ATC Heaven
This item should be replaced whenever the exhaust system is removed for service or inspection. Leaking exhaust gas is not only dangerous but it robs power from your engine. Be sure to replace this gasket when required. Gasket measures 39mm OD, 32mm ID, 4mm thick. Suits ATC90 70-78, ATC110 79-85Also ..
us$5.20
Brand: ATC Heaven
This valve set contains one inlet and one exhaust valve to service your cylinder head. Quite often valves can be bent or worn leading to poor performance and difficult starting. Consider replacing your valve set now. Quality valves made in Japan. Suits ATC90 70-78 and ATC110 79-84. Please note, imag..
us$38.00
Valve Collet ATC70 | ATC90 | ATC110
Out Of Stock
Brand: ATC Heaven
This is the collet that retains the valve spring to the valve. Although this part rarely wears out it quite often dissapears into thin air during valve dissassembly. Make sure you have a couple of these spare in your toolbox as it will save you a lot of frustrating searching at a critical time. Suit..
us$6.45
Brand: ATC Heaven
Valve stem seals should be replaced whenever servicing the cylinder head. We now offer these seal as a seperate item. Great for when your gasket set does not include these seals or when they have been damaged or misplaced. Sold per each. Suits ATC70 73-85, TRX70 86-87, ATC90 73-78, ATC110 79-85Also ..
us$2.50
Brand: ATC Heaven
No need to buy a full gasket set if you're only rebuilding the top end. Get this top end set and saveSuits ATC90 72-78, ATC110 79-83...
us$25.00
Oil Seal Set ATC90 73-78, ATC110 79-85
Out Of Stock
Brand: ATC Heaven
If you are about to do an engine rebuild on your ATC90 or 110 then you will be needing this kit. Oil seals become hard with age and start to leak, even if your seals aren't leaking now there is a good chance they will after being disturbed. Get this kit and do it right the first time. Suits ATC90 73..
us$45.00
Cam Chain Master Link 25H chain
Out Of Stock
Brand: ATC Heaven
Here is a master link to suit 25H series Cam Chain. Can be useful when cutting down a longer chain or using chain off a roll.Suits ATC70 73-85, ATC90 70-78, ATC110 79-85, ATC185/S, ATC200, ATC200E/ES, ATC200M/S, ATC200X, TRX200 84, TRX200SX 86-88, TRX200D 90-98...
us$1.95
Lower Gasket Set ATC90, ATC110
Out Of Stock
Brand: ATC Heaven
This lower gasket set contains all required gaskets for ovehauling the bottom end of your ATC engine. Use in conjunction with the Top Gasket Set to make a full set. Suits ATC90 70-78, ATC110 79-83...
us$21.00
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