[mud99]

OK this is some pics of what the cylinder and piston looks like on a 300EX im rebuilding for a friend. The rings was seized up in the piston, the cylinder wall steal had the honing marks from when it was built from the factory.Lots of carbon build up. Had 80 lbs compression. Sorry for the crappy pics.

 

[TRX2fiveO]

I would still bead hone it with some WD-40 to clean up the glazing, wire wheel the head and spray everything out real good. A new piston and ring kit and you'll be up and running in no time. here is what you need the CR is a little more

Wiseco Part#: PK1026
Product Type: Piston Kits
Description: '92-06 Honda TRX300EX 74.0mm (4574M)
Displacement: 282cc
Bore - Standard: 74.00mm
Bore - Actual: 74.00mm
Bore - Oversize: STD
Stroke: 65.5mm
Compression Ratio - Actual: 11:1
Valve: 4

 

[mud99]

Thanks Moose I will give him this info.

 

[TRX2fiveO]

I see Soccer is over...LOL

glad to help.

 

[mud99]

It was a tie 2 to 2.
Im going to let him clean his own parts. LOL

 

[TRX2fiveO]

LOL I would too but go behind him and look them over...lol

 

[mud99]

What is the torque specs on the head bolts and sequence?

 

[Helmut]

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[mud99]

Well the jug is off to be bored 30 over because of the ridge at the top.