hey guys well ive got a deal on a 2008 kfx450r quad well the guy that has it just wants to trade for my bike kx250f dirt bike good deal well there is one problem he said the cdi has burnt out on the kfx450r well ive looked into the cdi and its about a 200 dollar fix and i was wondering if it is worth the trouble and is this common on a kfx450r or what are the causes