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

Sorry wrong forum Try here http://tinyurl.com/283ghcb

thanks for nothing brv

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

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

fair play thanks for ya time

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

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

Someone knows their stuff Did you do physics by any chance haha

Still doing it, for another 2 years at least

thanks very much all iv been asking every one for long time and this is the first i got a answer