This one has only done 6000 miles and its �600 + delivery. 
        
 
         
        http://www.ebay.co.uk/itm/Yamaha-XT6...cAAOSw3YNXa~eD
         
         I just went through the same ordeal but as it is my daily commuter I had no choice but to buy a worn looking engine with unknown mileage. I was lucky and got a good deal its been running sweet for the last few hundred miles I've had it fitted. I am still going to strip and rebuild the old one. 
         
        
 Why would you need to get the crank balanced if you replace with oem parts? I've not heard of this before. 
       
  
        
        
       
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 Now have a 2017 S1000XR Sport SE
         
        
 2006 XT660X - Cat D write off due to someone pulling out on me - Pipewerx carbon fibre exhausts - Snorkel removed and airbox drilled - DNA stage 1 + 2 air filters - Kevs fuel controller mod - Scottoiler V system - Oxford heated grips - HEL braided brake hoses - Wilbers 540 rear shock - Brembo brake pads - AFAM chain and sprockets - Michelin Pilot Street Radial's - Denali DX Xtreme dual intensity spotlights