NOpe! Yamahas suck! especially the 1982 Yz490, I spent the whole year chasing about 6 of them on my 430 Husky, I rode the wheels off mine and they still beat me!!! bloody Husky was NOT in same race. They are a seriously good big bore, feel big too, go like stink and, well, flog 430 Husky riders!
Enjoy the 490, hope you have a young bloke to ride the 125, I never got along with those!
cheers,
Kt.