Ty175 Left Crankcase Damaged

[sherpina]

Greetings- I have a 1975 TY175. I am trying to sort out some problems, and the big one is the left crankcase is damaged where the clutch adjustment hole is. The whole area is gone, must have had a chain derail I'm guessing. I have not had any luck finding a crankcase half for the TY, but find lots of DT175 ones on ebay. They look similar and I'm wondering if they interchange. The bike is rideable but the clutch shaft goes up and down when the clutch is pulled and the adjustment goes back and forth. Any ideas or info greatly appreciated.

[feetupfun]

LH (ABCD) DT175 crankcase halves are quite different to the TY175, most obviously where the flywheel cover attaches. The closest match would be YZ125C and YZ125X (the first six-speed motors of that lineage), but I have not tried to match up the big TY175 magneto cover to one of those, and they are far rarer than TY175 casings anyway. Later model (EFGH) DT175s with the 6 speed motors are also different where the mag cover attaches, and also have a completely different shift shaft arrangement. I suggest you persist in seeking a TY175 case because they do pop up on eBay. A friend bought a pair of casings here in Australia on eBay only a few weeks ago. You may have to buy a bottom end or a pair of casings to get what you want. If the damage is repairable, just get it to a suitable welding specialist. Maybe if you posted a photo showing the damage, you could get an informed opinion about if it is repairable or not.

[sherpina]

Thanks so much for the info. I will wait and see if one pops up on ebay. I may try and get creative and have someone weld it up somehow. For now I just covered the hole to keep the oil in and the dirt out.

SSPX7618 by alperpa2001, on Flickr