Neil.dt Posted October 25, 2010 Share Posted October 25, 2010 i have a yamaha dtr 125 its been bored out but from normal its been bored out 2.5mm oversize what cc will it make the bike ? any one know Link to comment Share on other sites More sharing options...
Guest CardBoardDave Posted October 25, 2010 Share Posted October 25, 2010 Sorry wrong forum Try here http://tinyurl.com/283ghcb Link to comment Share on other sites More sharing options...
Neil.dt Posted October 25, 2010 Author Share Posted October 25, 2010 thanks for nothing brv Link to comment Share on other sites More sharing options...
Guest CardBoardDave Posted October 25, 2010 Share Posted October 25, 2010 Well ive had a good look and ive not found much im afraid. I cant even find any 58.5mm pistons for a dt125 only 58mm even then i cant give you a cc Link to comment Share on other sites More sharing options...
Vez Posted October 25, 2010 Share Posted October 25, 2010 You will find it rare to get a response to a question on your first post. Try introducing yourself in the bar section of this forum, politeness goes along way Link to comment Share on other sites More sharing options...
Neil.dt Posted October 25, 2010 Author Share Posted October 25, 2010 fair play thanks for ya time Link to comment Share on other sites More sharing options...
Vez Posted October 25, 2010 Share Posted October 25, 2010 F**k it, i'm bored. http://cgi.ebay.co.uk/Piston-Kit-Yamaha-2-50-TZR-DT125R-TDR-TZR250-58-90mm-/160495029986?pt=UK_Motorcycle_Parts&hash=item255e3fcee2 58.9mm DTR piston,2.5mm overbore apparently . Displacement = stroke x π x (bore/2)2 x Number of cylinders. So, providing your DTR is pre 04 and with a stroke of 50.7mm Then, 50.7 x π x (58.9/2)2 x 1 = 138.142.8559 x103 or about 138 cc Link to comment Share on other sites More sharing options...
David Baker Posted October 26, 2010 Share Posted October 26, 2010 F**k it, i'm bored. http://cgi.ebay.co.uk/Piston-Kit-Yamaha-2-50-TZR-DT125R-TDR-TZR250-58-90mm-/160495029986?pt=UK_Motorcycle_Parts&hash=item255e3fcee2 58.9mm DTR piston,2.5mm overbore apparently . Displacement = stroke x π x (bore/2)2 x Number of cylinders. So, providing your DTR is pre 04 and with a stroke of 50.7mm Then, 50.7 x π x (58.9/2)2 x 1 = 138.142.8559 x103 or about 138 cc Someone knows their stuff Did you do physics by any chance haha Link to comment Share on other sites More sharing options...
Vez Posted October 26, 2010 Share Posted October 26, 2010 Someone knows their stuff Did you do physics by any chance haha Still doing it, for another 2 years at least Link to comment Share on other sites More sharing options...
Neil.dt Posted November 7, 2010 Author Share Posted November 7, 2010 thanks very much all iv been asking every one for long time and this is the first i got a answer Link to comment Share on other sites More sharing options...
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