2009 Stella 2T 150, stock except for Polini racing box exhaust and larger main jet. Engine seized while coasting at low throttle / idle to a red light, happened just a few seconds after a long full throttle climb up a bridge. I split the cases (my first time to do that) and found the bottom end of the connecting rod was completely siezed within the crank (the connecting rod does not rotate freely on the crank). It looks tight and rusty, although the rust could have happened in the 2 months time between me removing the engine and draining oil and then later splitting the cases.
I will order a new crank and connecting rod (and piston/rings too as piston has pitting on top), but what else should I replace while I am in here, and what caused this crank / connecting rod seizure? Don't want it to happen again. Do I need a special tool to install the new crank, or can I make it go in with careful taps from a mallet?
Plan to replace:
- Connecting rod
- Piston and rings (cylinder looks smooth)
- Oil seals
- All gaskets
Anything else I should do for preventive maintenance while I am in here with cases split?
Any recommendations for best replacement crank to order for Stella 2T 150?