I hesitate to say this but, I fix computers and have done for some years now and there are lots of laptops out there that have a known problem with overheating, now under the sale of goods act (see EU regs) the item, what ever it might be, should be fit for purpose, if there is a known fault with the shocks on the dragstar then this "SHOULD" be one of those times when a refund or replacement is in order. The sale of goods act is meant to cover just this type of fault, that is when an item is used in the correct way and has no modifications or abnormal use but fails due to poor design or abnormal wear. I'm not saying that you will get your money back but Yamaha must know that there is a problem if it is as prevalent as you say and everybody knows this happens. There is "NOT" a one year warranty on such items but under the regulations at present it is in fact a MINIMUM of 2 years and up to 7 years depending on the type of item and where you are in the UK, in fact in SCOTLAND the minimum time for such repair or replacement is 7 years. This at the moment is used using white goods ie fridge freezer or washing machine/ dryer but covers any and all mechanical parts that are fitted as normal to any mechanical device.
If you don't believe me then got to the EU website and check it out, I have had at the very least 12 laptops replaced by the manufacturer (Dell/Toshiba/Samsung) using this very same argument, just print out the form that is available from the EU website present it to your dealer with a covering letter that states your problem and they HAVE to respond to your problem under the latest statutes regarding the sale of goods.
PS if they refuse to consider your claim then you are entitled to start a small claims case against them (at no cost to you) in which they must respond within 4 weeks of their intention to replace said faulty item or respond to your claim in court, I have never had any of the big 5 computer companies refuse to replace a faulty item and only once have had the need to go to the bother of a small claims court where they lost!!
Re: EU Directive 1999/44/EC -V- Sale of Goods Act
Your interested in the EU directive 1999/44/EC NOT the SOGA, these are different things and in some cases can confuse the issue when not taken in the correct context.