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  • ATC90 cylinder Machine shop service Bore ,Hone ,paint, new piston kit and top gasket kitATC90 cylinder Machine shop service Bore ,Hone ,paint, new piston kit and top gasket kit
    Vintage Motorsports
    ATC90 cylinder Machine shop service Bore ,Hone ,paint, new piston...
    $325.00
    $325.00
    Vintage Motorsports is proud to offer a full top end rebuilding package for your ATC90 cylinder, Here's how it works you send us your Cylinder...
  • New replacement piston kit for all year ATC90s 1970-78 cast like oem
    Vintage Motorsports
    New replacement piston kit for all year ATC90s 1970-78 cast...
    $55.00
    $55.00
    this is a nice little piston kit we have been using for some time now with zero issues. NOS pistons are becoming tough to find...
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  • New Connecting rod kit Honda ATC90 all years 1970-78
    Vintage Motorsports
    New Connecting rod kit Honda ATC90 all years 1970-78
    $65.00
    $65.00
    this is a nice OEM quality connecting rod kit we use in our crankshaft rebuilds , comes with the connecting rode, new pin, and new...
  • New Crankshaft main bearing very high quality KOYO bearing from Japan
    Vintage Motorsports
    New Crankshaft main bearing very high quality KOYO bearing from...
    $35.00
    $35.00
    Brand new KOYO crank main bearing , we order these straight from Japan the specs on these bearings are better than what came from Honda...
  • New Main shaft bearing Honda atc90 1970-78 Koyo Japan 6004New Main shaft bearing Honda atc90 1970-78 Koyo Japan 6004
    Vintage Motorsports
    New Main shaft bearing Honda atc90 1970-78 Koyo Japan 6004
    $15.00
    $15.00
    this is the bearing that the main shaft on the transmission rides on  fits all year atc90s , and we replace every bearing on all...
  • New countershaft bearing on all year ATC90s 1970-78 Koyo Japan 6204New countershaft bearing on all year ATC90s 1970-78 Koyo Japan 6204
    Vintage Motorsports
    New countershaft bearing on all year ATC90s 1970-78 Koyo Japan...
    $20.00
    $20.00
    this is the larger bearing that presses into the center case that the countershaft rides on . fits all years of the atc90 1970-78  we...
  • New Koyo Japan Sub trans cover bearing Honda ATC90 1970-78 6202New Koyo Japan Sub trans cover bearing Honda ATC90 1970-78 6202
    Vintage Motorsports
    New Koyo Japan Sub trans cover bearing Honda ATC90 1970-78...
    $15.00
    $15.00
    this is the bearing the presses into the sub transmission cover on a 1970-78 ATC90 you should always make it a rule of thumb to...
  • complete engine case screw set for 1970-78 Honda ATC90s correct JIS head
    Vintage Motorsports
    complete engine case screw set for 1970-78 Honda ATC90s correct...
    $25.00
    $25.00
    we have put together a 35 piece kit of every JIS Phillip's headed 6mm case screws used on the external cases on a 1970-78 ATC90...
  • Vesrah full gasket kit ATC90 made in japan
    Vintage Motorsports
    Vesrah full gasket kit ATC90 made in japan
    $75.00
    $75.00
    this is a full gasket kit to fit all year ATC90s 1970-78   Note !! if you have an early us90 1970-71 model you will...
  • top end gasket set 1970-78 Honda ATC90s # 06110-918-010p
    Vintage Motorsports
    top end gasket set 1970-78 Honda ATC90s # 06110-918-010p
    $30.00
    $30.00
    this is a top end gasket set  to fit the 1970-78 ATC90 models   Note if you have a first year 1970-71 model you will need...
  • NOS Honda lower end gasket set ATC90s 70-78
    Vintage Motorsports
    NOS Honda lower end gasket set ATC90s 70-78
    $75.00
    $75.00
    NOS oem Honda lower end gasket set for all years ATC90 this is only the gaskets below the Cyl  if you need gaskets from the...
  • NOS Copper round head gasket for early 1970-71 Honda US90s # 12231-028-030
    Vintage Motorsports
    NOS Copper round head gasket for early 1970-71 Honda US90s...
    $18.00
    $18.00
    the very early Honda US90 engines used this round copper head gasket  these are now discontinued from Honda.  you will need this in addition to...
  • NOS LH Honda oem ATC90 70-78 engine cover gasket # 11395-918-000
    Vintage Motorsports
    NOS LH Honda oem ATC90 70-78 engine cover gasket #...
    $15.00
    $15.00
    new oem gasket for the LH ( stator side case)
  • NOS Honda ATC90 clutch cover New oem # 11330-918-000
    Vintage Motorsports
    NOS Honda ATC90 clutch cover New oem # 11330-918-000
    $225.00
    $225.00
    this is a brand new clutch cover fits 70-78 ATC90s
  • New clutch friction plate set Honda ATC90 1970-78 set of 3
    Vintage Motorsports
    New clutch friction plate set Honda ATC90 1970-78 set of...
    $42.00
    $42.00
    this is a full set of friction plates for the clutch of an ATC90 always replace these plates during an overhaul
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