Dirtbike Electricity

After the bike got hot and stopped working, a half-mile down the black-diamond trail called Troll Trail, we figured it was the stator. What the hell is a stator and what does it do? It doesn’t do nothing, it just sits there while the flywheel spins around it. On the flywheel however are some magnets, and as the flywheel spins wickedly around the wound-up stator it excites the coils on the stator which delivers the throbbing electrical juice. Whoa!
On a KTM that juice travels out through a rubber grommet-thing that flexes, expanding and contracting with the heat, and that sits in-line with the front wheel which splashes it with sand and dirt and water and mud depending on the conditions, so it gets really groty in there.
The trick is gettin’ at it – it’s behind the flywheel which is covered by a plate held on with five-bolts, and the flywheel is held on with a reverse threaded nut that’s cranked-down but good. It helps to have a buddy with the properly threaded flywheel-puller device, and air-compressor and an impact wrench to remove the flywheel. The bolts that hold the stator plate also have to come off too, and then the stator itself – unfortunately the stator was held in place with evil, soft, and groty-headed Phillips screws – but we managed to get them off without damaging the tender heads.
A couple cans of brake-cleaner (well, just one) and the wire-brush on a Dremel worked to clean-out the insides and the plate. With the old one removed, we fed the wires back through the plate and re-secured them with the rusty little wire-clamp doohicky.

After that we fed the wires down a tube to protect them from heat and vibration, and re-routed the wires so they’d be easier to get-at. While we had everything apart I also took the opportunity to gut the restrictive thermostat in the cooling system, since this bike never sees any street riding and doesn’t really require a warm-up circuit. Does it work? It was time to re-install the tank, shrouds, and seat and see if it ran. Yes indeedy, Mike can wheelie. Whether that solves the overheating problem – most likely yes, but we won’t know until an extended ride takes place which should be soon if the weather cooperates and we get some rain. This bike with its long wheelbase and generous power output is outstanding in the mud and muck.

(Professional redneck-rider on a closed-course, don’t try this at home or without a helmet)

About NotClauswitz

The semi-sprawling adventures of a culturally hegemonic former flat-lander and anti-idiotarian individualist, fleeing the toxic cultural smug emitted by self-satisfied lotus-eating low-land Tesla-driving floppy-hat wearing lizadroid-Leftbat Califorganic eco-tofuistas ~