ratrod Posted August 4, 2008 Share Posted August 4, 2008 Hey Iam new here trying to get some help. I built a ratrod bike from parts laying around. I found a motor laying around I do know it is a yamaha 400 but I dont know what year or exact model. How do I figure this out. Any help please so i know what engine to buy parts for. It runs now thank god. Link to comment Share on other sites More sharing options...
rf9rider Posted August 4, 2008 Share Posted August 4, 2008 There should be an engine number stamped on right hand side of motor. You can find out year etc with this. Link to comment Share on other sites More sharing options...
ratrod Posted August 5, 2008 Author Share Posted August 5, 2008 Yeah I got the engine number but i not sure how to break it down to what numbers mean what. Link to comment Share on other sites More sharing options...
rf9rider Posted August 5, 2008 Share Posted August 5, 2008 You can tell the year by the first few letters. If you haven`t got an owners manual, post the first few letters up and someone will tell you. Link to comment Share on other sites More sharing options...
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