squid Posted December 21, 2009 Report Share Posted December 21, 2009 Hello I'd like to upgrade my standard 1976 Ty 125. The original Rayer upgrade kit is very hard to come by but he still produces a kit for a DTMX. Has anybody out there bought and used this one? P.S took the diddy girl out at the weekend for a mooch in the woods and she's behaving well, I love it but would love a bit more grunt. Thanks Squid. Quote Link to comment Share on other sites More sharing options...
mattylad Posted December 22, 2009 Report Share Posted December 22, 2009 The DTMX uses different crankcases. The centres of the studs are different where it bolts to the cylinder. Be careful before you buy. Why not buy a TY175 cylinder on ebay uk, much cheaper than in France!!! Also look on the Mijossi.com site there is an article to improve power from a TY 125. Quote Link to comment Share on other sites More sharing options...
squid Posted December 22, 2009 Author Report Share Posted December 22, 2009 Hello Mattylad. Thanks for that,makes sense. I do keep me eyes peeled for TY 175 cylinder heads but I hav'nt seen anything for a while besides one that had some serious marks in the barrel. I looked on Chris Rayers IP moteurs site and got a bit confused with the goodies he has on there. Cheers and have a wild Christmas. Squid Quote Link to comment Share on other sites More sharing options...
feetupfun Posted December 22, 2009 Report Share Posted December 22, 2009 (edited) Squid, the DT175 A,B,C and D models have a 175cc barrel and head that is interchangable with the TY175 and has the same port timing. The compression is probably higher with the DT head but that is easy to deal with. It would look different because the finning is different on the barrel and the sparkplug holes are at an angle. None of that would stop me using a DT175 barrel and head if I had a TY125 that I wanted to make into a 175cc and there are thousands of those model DT175 motors in bike wreckers, on farms and in kids buggies throughout OZ. There have even been postings on this website from people trying to work out why their TY125/175 motor looks different, because it has a DT175 barrel and/or head. I know the port timing is the same because I have both a TY175 barrel and DT175C barrel sitting in my shed and measured them up for someone else. PS I just read that you live in France but I suspect that DT175ABCD motors would be common there too. I can do a photo of one if you want for reference purposes. David Edited December 22, 2009 by feetupfun Quote Link to comment Share on other sites More sharing options...
metisse Posted December 22, 2009 Report Share Posted December 22, 2009 Hi If your in France give Stuart Brown a call on 06 87 38 35 30 he has an Aladdins cave of twinshock trials bikes in various states of disrepair.... he may have what your after.. At worse if he hasn t, he might know a man that has.... Hope it helps. Quote Link to comment Share on other sites More sharing options...
feetupfun Posted December 24, 2009 Report Share Posted December 24, 2009 (edited) Hi squid I've posted some photos of a DT175 motor here http://www.trials.com.au/content/index.php...er&Itemid=6 in the Twinshock and Classic forum Regards David Edited December 24, 2009 by feetupfun Quote Link to comment Share on other sites More sharing options...
tony27 Posted December 25, 2009 Report Share Posted December 25, 2009 Shouldn't you be getting ready for christmas lunch David? Quote Link to comment Share on other sites More sharing options...
feetupfun Posted December 25, 2009 Report Share Posted December 25, 2009 Yes and it was a nice lunch too but you should know I cannot resist doing stuff in my shed Quote Link to comment Share on other sites More sharing options...
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