Hihi!
Well, it´s actually a quite funny history with the 3 valve head. Swedish engine designer Nils Hedlund made the 3 valve head but that you propably know. What many people don´t know is that Yamaha destroyed the casting moulds, no one knows why... propably because they where in the starting blocks to release their big 2 stroker and wnated to avoid 4-stroke competition. Otherwise motocross history might have looked different, more manufacturers might have continued/ taken up 4-strokers into and maybe through the eghties... But i guess we´ll never know now will we
P.S
If I meet Bengt I´ll give him your offer marcFX. I paid 2900 AUD for my Curtis Honda a couple of years ago, but yeah, guess you´re right Marc, unusuall bikes and especially 4-strokers just might land a wee tad over 3000 AUD
D.S