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ATC90 70-73

ATC90 70-73

This section allows you to search for all parts relevant to Honda ATC90 70-73 models

ATC90 (US90), 1st generation introduced 1970, ends 1973, Features:

  • Model Code for 70-73 models "918"
  • 4 speed auto clutch transmission High & Low range sub transmission
  • 22x11x3.5 low pressure tyres, SPWAMULASS (Water,Mud,Land,Sand,Snow)
  • Tyre pressure 0.1 kg/cm2 (1.5 PSI )
  • 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, 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


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
Brand: ATC Heaven
Got worn rings on your ATC90, This will fix it, Get this .50mm ring set to either replace your worn oversize piston rings or file back to suit.Suits ATC90 70-78Please note, Image shown is not correct for this part...
us$45.00
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
Brand: ATC Heaven
This is a full gasket set to suit ATC90 models from 70-78.Contains all the gaskets required for a full engine rebuild. Quality gaskets made in Taiwan.Suits ATC90 models from 70-78...
us$39.90
Brand: ATC Heaven
Reproduction gear lever to suit ATC90 and ATC110 models. Get this item and get shifting againSuits ATC90 70-78, ATC110 79-85, ATC125M 84-85, TRX125 85-86..
us$38.00
Brand: ATC Heaven
New Clutch Springs can make a real difference, if your clutch is slipping, and normal adjustments aren't helping maybe you need these new springs. Suits ATC90 70-78, ATC110 79-85, ATC125M 84-85, TRX125 85-86. Please note: image shown is not correct for this item...
us$25.00
Brand: ATC Heaven
Push Handle Decal, shows procedure to lock swivel lock handle on 1st generation US90.Suits ATC90 70-72,..
us$6.50
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