« previous next »
Pages: [1]   Go Down

Author Topic: 88 vs 90 kx500  (Read 1849 times)

0 Members and 1 Guest are viewing this topic.

Offline Wilde1yamaha

  • Jr. Member
  • **
  • Posts: 14
88 vs 90 kx500
« on: December 01, 2019, 01:15:23 PM »
Hey guys I'm almost ready to assemble my 1988 kx500 and put the track kit on, my question is are the 1988 and 1990 cases and cranks the same? I know the cylinder is way different but what is is different? Thanks
Logged

Offline dave916

  • Hero Member
  • *****
  • Posts: 546
Re: 88 vs 90 kx500
« Reply #1 on: December 01, 2019, 09:26:41 PM »
88 cases have more crankcase  volume/
88 cases boysen case port Wont match the 90 cylinder perfect
88 have no retainer on one gearbox bearing/ same size so no issue there
u need differant  lenght rear cylinder studs if  interchange 88/89 cylinders

Crank are pretty much the same 88/89 the just look differant /different method to balance/ holes vs countersunk area
 
Logged

Offline Wilde1yamaha

  • Jr. Member
  • **
  • Posts: 14
Re: 88 vs 90 kx500
« Reply #2 on: December 02, 2019, 02:28:32 AM »
Are the case halves the same besides the bearing retainer or are they different volume?
Logged

Offline dave916

  • Hero Member
  • *****
  • Posts: 546
Re: 88 vs 90 kx500
« Reply #3 on: December 02, 2019, 05:55:52 AM »
Quote from: Wilde1yamaha on December 02, 2019, 02:28:32 AM
Are the case halves the same besides the bearing retainer or are they different volume?
Differant volume / 88 had larger crankcase volume
Logged
Pages: [1]   Go Up
« previous next »