I have a MY09 leopard I am unsure of how many hours are on it.
The issue I am having is that the bottom end throws off a lot of heat when the engine is above 15,200rpm. I can feel the heat through the right side of my seat. So the magneto side of the engine. Coming of track the crank nut is quite hot.
Normal or time for a bottom end rebuild?
high rpm = high speed = modified airflow which hits the seat when it normally doesn’t? if it’s building that much heat, that you’re able to feel it only when the RPMs are high (i’m assuming this isn’t a steady-state), then the motor would have already gone kaboom, or started making awful sounds.
Can you wiggle the crank nut up/down enough to notice? If so, check your main bearings before you carve a trough in the cases with your connecting rod…or maybe push it through the block! This doesn’t sound like an “airflow” heating issue to me…
Just a follow up,
I rebuilt the bottom end. When I separated the case I found the magneto side crank seal to have failed. Which I guess was blowing pulses of air out at high rpm.
Raced it last week and no extra heat was felt.