


Assault bike - cheap FB marketplace buy repaired.
I’ve been in the market for an assault bike for a while to compliment my C2 Bike erg. Found this one cheap on FB marketplace with a broken screen and clunky pedals and handles. Took a chance on it, picked it up, somehow managed to fit it into the back of my landrover and got it home.
Checked out the clunk first and there were loads of loose bolts so I thought I’d get it working in 5 mins or less. This helped the wobbly arms but didn’t fix the clunk properly. I noticed the link between crank shaft and the fan belt (pictured) seemed to be the cause. I took it apart and noticed the thread was stripped in the lower half of both sides. I had a few options here, buy a new one, drill and tap to a bigger size or put longer bolt through and a nut on the end. I emailed primal for spares but haven’t heard back, drilling and tapping might not leave enough material to torque it up properly so I opted for the simplest solution which was a longer bolt and nut on the end. Then a gave all the other nuts and bolts a good clean, lubricated all the moving parts and it’s running perfectly. Completely smooth through full rotation at high and low effort. Easy win!
Next was the screen. I’ve found replacement screens online as cheap as £40 and as much as £140 but thought I’d take a punt at getting it going myself. I opened it up and the battery connection terminals were completely corroded and the cables connecting them to the circuit board had broken loose. I ordered a new battery terminal box that I bolted onto the back of the screen, soldered it in and it worked!
All in, I paid £120 for the bike itself, £4 for the battery box and I had the nuts and bolts lying around already so I’m pretty pleased with the outcome. Just in time for the next heatwave! lol