tworivers Posted July 8, 2013 Report Share Posted July 8, 2013 I have just been trying to find out the year of my Ty 175,to find that the engine number looks like it has been ground off and the frame number reads * 13 E - 000284* . I found a chart on the net and it looks like it might actually be a 125 frame. How would I check the engine cc without a number.? And I am correct in saying that the frame is a 125? Cheers Quote Link to comment Share on other sites More sharing options...
feetupfun Posted July 8, 2013 Report Share Posted July 8, 2013 (edited) you could take the cylinder head off and measure the diameter of the bore. TY175 standard bore is 66mm diameter If you have a clever way of measuring, you could alternatively either take off the exhaust pipe or the reed cage and measure the bore The TY175 and TY125 have the same stroke Lots of TY125s have been made into 175s over the years Edited July 8, 2013 by feetupfun Quote Link to comment Share on other sites More sharing options...
feetupfun Posted July 8, 2013 Report Share Posted July 8, 2013 If you are still having problems identifying the motor, post some photos showing the engine covers, cylinder and head Quote Link to comment Share on other sites More sharing options...
tworivers Posted July 8, 2013 Author Report Share Posted July 8, 2013 Thanks for the info, when you say take pics of the cylinder and head do you require me to take off the cylinder head, I suppose you must do to see the cylinder ? Quote Link to comment Share on other sites More sharing options...
pschrauber Posted July 8, 2013 Report Share Posted July 8, 2013 (edited) Not necessary the dimension of the cylinder is normally easy to detect as the cubic cc is printed on the cylinder from the outer side! You find in near the intake on the left side (in driving direction), if it is a 125 cc model there should be printed 123 cc If it is a 175 cc model there should be printed 171 cc It is not possible to rebore the 123cc cylinder to a 171cc piston! See here: Edited July 8, 2013 by pschrauber Quote Link to comment Share on other sites More sharing options...
pschrauber Posted July 8, 2013 Report Share Posted July 8, 2013 Just forgot the frame of the 125 cc and the 175 cc model are pretty much the same. Quote Link to comment Share on other sites More sharing options...
tworivers Posted July 8, 2013 Author Report Share Posted July 8, 2013 Great advice thanks, checked where you said ait as 171 stamped on the engine. Thanks 1 Quote Link to comment Share on other sites More sharing options...
copemech Posted July 9, 2013 Report Share Posted July 9, 2013 Such a sweet little motor! Pity we cannot have something like that nowadays for punters and beginners bikes! On a modernized chassis this would be superb! 1 Quote Link to comment Share on other sites More sharing options...
old trials fanatic Posted July 9, 2013 Report Share Posted July 9, 2013 Such a sweet little motor! Pity we cannot have something like that nowadays for punters and beginners bikes! On a modernized chassis this would be superb! Quote Link to comment Share on other sites More sharing options...
andy.t Posted July 9, 2013 Report Share Posted July 9, 2013 Somebody who was supposedly in the know told me that Yamaha was considering reproducing the engine in a 200 version, no mention of a new frame. Anyone else heard any rumours ? Quote Link to comment Share on other sites More sharing options...
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