Check recent post from DVM... I thinks he's selling what you want. (Not sure why you want a CT3 cylinder when you already have what you said was a good DT175 cylinder?)

Anyway, post was something like "members near Orange County". DVM is a great guy and has one of the best running CT3's I've ever ridden. You can ask if he'll ship to you.

Thanks mark the reason is because a ct3 cylinder and head to match like you suggested. Is a dt175 piston compatible with the ct3 porting. Thanks for your help

                                                  What I don’t like about the Dt175 cylinder is that the tach drive cable
                                                    Isn’t clearanced in the cylinder and head.  Thanks for your time 

 
thing 

If there is no tach cable fin clearancing then I'm pretty sure you do not have a DT175 cylinder.  The 74 cylinder definitely had clearancing.

                                                 Sorry about typing. Tachometer comes out on a major different angle
                                                  On the dt175 than the dt 125. I think the ct3 comes out just like the
                                                  74 dt125. I seen the bike it came off of

Can you post some pictures that would help you have to use a third party Imgur, google photos etc 

                                                    I don’t usually don’t usually do anything like this. I wouldn’t know 
                                                      Post pics other than direct. Tried to change avatar and that doesn’t
                                                      Work ether. I will just get a ct3 cylinder. DVM doesn’t send so I will
                                                       The 125 runs great. Totally rebuilt. Does the 175 have a lot more 
​​​​​​                                                       Power than the 125 or a waist of money? Thanks

The 175's have LOTS more power than the 125's! You would love the boost in power.

                                                     Thanks that’s what makes it worth while! Will the electric start still 
                                                     Turn the motor over? I have a AGM battery with double cca over
                                                     Stock!  Thanks Rod

I have seen 125's upgraded to 175's crank over with no problems but no guaranties.
DVM