Matt@TYGA wrote:The NSR150SP can be a noisy little bugger. Ive done a couple of noisy 150's and it was down to piston/bore clearance. Hunted through pistons and got the clearance at 0.04mm. This seemed to work. Not perfect, but better.
I even know of one guy that complained to AP Honda (Honda Thailand) about a noisy 150SP and he was told, they all sound like that mister.
You really have to consider the price and realise that these are 'made in Thailand' budget bikes. I know that you want something to purr but that ain't gonna happen with an NSR150SP!
Thanks for the reply and the empathy Matt. I certainly wouldn't mind opening up the engine myself and replacing the piston and cylinder myself.