Description

This is Jon’s full color zoomable high resolution diagram for those of you with a CT90 that has little to no wiring.

The PDF wiring diagram file lets you zoom in to see razor sharp details. No need to endure squinting at a fuzzy black and white diagram from a manual.  This is not a printed document.  You receive the personalized PDF file via email. You may print it for your own use, or view on your devices that display PDF files.  The best software for viewing is Adobe Reader (free from adobe com) because it holds sharp focus when you zoom in.

Some years ago a farmer wrote us about an old CT90 sitting around unused.  Varmints and time had ruined the original wiring, but the engine and chassis were serviceable.  He knew if he could rewire the bike using parts store wiring and toggle switches, it would make a great bike for riding the fences.  Jon’s original “Ranch Wiring” diagram was created to fill the need.  Over time, others needed either some lights, no lights, or a street legal version.

You get all 4 wiring diagrams that have resulted:

  • Ranch Deluxe: battery, rectifier, ignition coil, points & condenser, head & tail lights, brake switch/light, neutral switch & light, horn button & horn.  Uses one SPDT toggle switch, one SPST toggle switch and a 15 Amp fuse.
  • Tailless Ranch: battery, rectifier, ignition coil, points & condenser, head & tail lights, neutral switch & light, horn button & horn.  Uses a SPDT toggle switch a SPST toggle switch and a 15 Amp fuse.
  • Night Ranch: battery, rectifier, ignition coil, points & condenser, and a head light.  Uses a SPST toggle switch and a 15 Amp fuse.
  • Day Ranch: battery, rectifier, ignition coil, points & condenser, a SPST toggle switch and a 15 Amp fuse.  The original, most basic wiring diagram to get a CT90 engine running so it charges the battery.

One of these durable bikes motivated us to share our extensive electrical knowledge online in 2001. We do give some files away, this site has a few links to freebie files created over the years.  We ask you to be an Information Hero: refer people here instead of copying the files and reposting them on another site.  Why? People get the latest version here, knowledge is always being added to.  Besides, it’s a lot of work to illustrate this stuff, and folks deserve an original work of art.