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I am planning on milling my js440/550 head and was wondering how much I can safely mill it by without any complications. i have found threads of people saying they have done it but nothing to say how much to do it by. Let me no what your suggestions are please many thanks Steve

Hi have just discovered a chunk of metal missing from the piston housing inside my block so require a new one. i am in the middle of looking at another on eBay however it does not look the same as mine. so my question is are all js440 blocks the same throughout production or are there different...

Hi all this is only my second post with the first getting no replys so I'm hoping you can help me on this thread. basically we have just fitted a westcoast full exhaust system with a westcoast water box. We are wondering what you all think about the way we should run all the water lines. at...

Hi all I'm new on here and to jet ski's so thought I'd post and see what everyone thinks and suggests. my name is Steve and I live in the uk and have recently purchased a js440 with my brother. Ski, I purchased the ski from a friend at work who has had it in here farthers garden for 12 years...