Originally Posted by bigmike35
...just want to know although i have a manual how hard is it to remove as im not very machanicaly minded
In that case you'll be up against it. Removing the powerhead is the easiest bit. You will have to thoroughly clean the powerhead, remove the flywheel and the ancillary equipment, split the crankcase, undo the bigend caps, recover ALL the needle rollers, remove the main bearing caps, split the bearings and again recover ALL of the rollers, lift out the crank, pull the piston, do the necessary repair, clean everything thoroughly to remove debris, refit the piston and reverse fit everything else, torquing all the fasteners correctly, and then refit the powerhead.
If you are a practical person, working carefully and methodically you'll be fine but if you have a problem with this type of work ......well, it's your call.