One of it's little foibles was to get through plugs after not many miles, all NGK 'cos that's all that was available at the time. Fitting a Boyer set up improved the running but not the plug chewing.
On advice I dug into the pocket and bought an iridium plug and problem went away. Replaced it 2010 ready for the Big Adventure keeping the original as a spare. Not been touched since.
Just my 2d