The Jap answer to valve operation and synchronisation is to use chains to drive the cams instead of belts as 'We' do.
Reasons; weight reduction, quieter running, no need for an oil supply to lube chains, COST!!.
Downside is obviously the need to maintain them more, especially on models with high shock loadings caused by extreme cam ramps (sp, sps, R.)
I personally do all I can to my bikes apart from the tasks that require special tooling or expertise just to keep the costs to a minimum, you'd be surprised how much the average person can undertake and how much it knocks off your total bill.
