CT90 - making a wiring harness

CT90 - making a wiring harness

The CT90 has a simple wiring harness and making a replacement is pretty straightforward. Much of the wring on my 1969 K1 had been damaged, cut or patched so I decided to do a major overhaul, including making a brand new harness. Here are the before and after picture of the various repairs: making a...

The CT90 has a simple wiring harness and making a replacement is pretty straightforward. Much of the wring on my...

Honda CT90 - posi-torque sub transmission

Honda CT90 - posi-torque sub transmission

Honda invented the posi-torque system in 1967 and started to fit it to the CT90 range in the same year. This ingenious device had the effect of providing the bike with 4 additional hillclimbing gears in addition to the standard 4 ratios for road-riding Earlier solutions The posi-torque system replaced the unwieldy dual rear sprocket...

Honda invented the posi-torque system in 1967 and started to fit it to the CT90 range in the same year....

Honda CT90 - muffler and spark arrester

Honda CT90 - muffler and spark arrester

The CT90 exhaust system, although similar in appearance to the one used on the 6v C90, has different internals with fewer baffles and the addition of a Krizman spark arrester. Spark Arresters Spark arresters are designed to minimise the risk of fires being started by exhaust sparks and are required in the US when using...

The CT90 exhaust system, although similar in appearance to the one used on the 6v C90, has different internals with...

Honda CT90 - Front Suspension

Honda CT90 - Front Suspension

The earliest CT90s shared the same leading link suspension as the C90 Super Cubs. This is a great design, offering a comfortable ride and minimising maintenance issues by tucking the moving parts away from the elements. However, the forks were designed for road use and therefore only allowed a small amount of suspension travel; not...

The earliest CT90s shared the same leading link suspension as the C90 Super Cubs. This is a great design, offering...

Honda CT90 (k1) - wiring diagrams

Honda CT90 (k1) - wiring diagrams

I am recommissioning an 1969 CT90 k1, imported to the UK from California. One of the many jobs needed to get the bike running is to replace the damaged wiring harness, so I've colourised the wiring diagram to make it easier to read. You can get a copy below. Full diagrams When the...

I am recommissioning an 1969 CT90 k1, imported to the UK from California. One of the many jobs needed to...