Horrendous scraping when kicking over

[shocky]

Are those bits alloy or steel they look alloy

[vRSG60]

They don't feel soft enough for alloy.

[Jazzy]

Piston skirt.debris jamming the crank.
Don't force it or you could break the crank housing.

[rosscla]

Assuming he'd have said if the piston was damaged in any way when you took the barrel off.

Looking like crank big end

[Jazzy]

First rule of this game is Asume nothing.
First time I lost part of the piston skirt the break was so clean it was hard to tell anything had fallen off.

[vRSG60]

Looking like big end. The only but I'm going to struggle to do myself, take the crank off

[bazza3004]

If you have stipped it as you state so far im sure you wont have much trouble taking the crank out.

[vRSG60]

Well big end bearings gone definitely I can move the con rod about 10mm at the big end. Bugger and damn.
It looks like I need special tools for the crank. May as well take the engine out and take it somewhere to be done.

[coaster]

Well big end bearings gone definitely I can move the con rod about 10mm at the big end. Bugger and damn.
It looks like I need special tools for the crank. May as well take the engine out and take it somewhere to be done.

It'll be a bit easier with special tools but it's perfectly possible to remove and replace the crank with normal hand tools. I know as I don't have any 'crank' tools myself and have never had any problem. Just don't use a hammer directly on the drive side to knock the crank out if you want to use the webs again.

[vRSG60]

I'm assuming it'd be better to replace the whole crankshaft and not just the big end bearing?