I'm looking into my options right now, the YZ is going to take a lot to rebuild. I do have a LT250R motor that's ready to go, I was trying to keep it in the yamaha family and I'm not sure how easily the lt motor would fit in the quad.
as for the radiator, I would like to mount it up front for simplicity reasons and the added airflow never hurt anyone.
Unfortunately the low front position is prone to sticks and rocks, as well as affecting the "nimbleness" of the Blaster by increasing the polar moment of inertia. I did find this high position on mine quite easy to mount (thanks to YZ Otis brain work) and the air flow is excellent. No overheating problems.
Asleep at the seat, or "The Old Man and the Quad":
![181352_10150948625965803_288494696_n.jpg](/proxy.php?image=https%3A%2F%2Fscontent-lga1-1.xx.fbcdn.net%2Fhphotos-xfa1%2Fv%2Ft1.0-9%2F181352_10150948625965803_288494696_n.jpg%3Foh%3D644778067fdbdfe24d052231f06f88d7%26oe%3D563451C8&hash=bd30900f93bc593b6998485e38f0cd2f)
Almost 50hp and only 300 lbs, I won't be at the back of this pack for long.
This quad is a real "Sit down, shut up and hang on!"
My only wish is for more gear ratio. More gears, wider ratios.
![564191_10150948638185803_51469386_n.jpg](/proxy.php?image=https%3A%2F%2Fscontent-lga1-1.xx.fbcdn.net%2Fhphotos-ash2%2Fv%2Ft1.0-9%2F564191_10150948638185803_51469386_n.jpg%3Foh%3Dc6068deaf7378e25a2144c41d8622764%26oe%3D55E6EDDA&hash=3b064c91ef3cd546da1f00adcf46b37f)
Steve