Stage 2, take 2. Postie engine is GO!
It’s been a very constructive day in the garage…
And yes, the Postie engine is now in the Cub. I just couldnt resist.
I’m still waiting for an after-market exhaust, but got my hands on a stock CT110 pipe for the interim.
I wanted to put together a how-to, however seeing as a lot of this is making it up as I went along, it makes it a bit hard so all I can do is give some points.
- You have to drill and extra hole to mount the coil
- I ditched the internal part of the battery frame to fit the 12v battery.
- The CT110 wiring loom is noticeably thicker at the point it comes out of the frame, near the engine – so be careful.
- Strangely the Cub uses a lot more complicated ignition lock that the CT. Blade connectors fit easily into the Cub ignition plug and then run wires (4) down to the ignition connectors on the CT loom.
- Cheap chinese switch blocks dont seem to be able to handle the voltage/amperage/whatever. My headlight worked for a moment, then didnt. Burnt out the switch. Skipping the park light and high-beam for the moment I just hardwired the lighting into the alternator (easy enough).
- CT sprocket cover loks crap next to the Cub chain case. I should be ale to modify the Cub sprocket cover to fit the CT engine.
- Wires for the horn need extending.
- The entire CT loom is about an inch shorter than the Cubs. Does sound like much until youre trying to plug all the front wiring in
- Stock Cub exhaust wont fit the CT engine as the CT has and extra oil-delivery channel into the clutch which leaves a large ‘lug’ sticking out the side and thus the Cub exhaust fouls on it.
- As much as I had a custom intake manifold made, in theory you can make something enough to work. You need a “standard” forward-facing pit-bike manifold and a 45mm riser that most of these companies sell.
- Regardless which manifold you use, it wont line up with the Cub airbox, so expect to have to fk around with jetting (I’ll post up my settings once ive worked them out).
- Expect to spend a good couple of hours sitting in front of the bike with a multi-meter working out the wiring.
Its not 100% finished yet, but will be soon.