Got the clutch in. Kinda weird that they put clutch material on aluminum plates. I guess we shall see how that works out, but clutch is in and holding. 

The timing advance was definitely frozen at the starting part, because it now runs like a beast. Pulls hard enough that it just flattened the new rear tube. Time for a rim lock I guess. 

There is some sputtering on the top end on the revs so Ill have to figure that out. 

Top end rpm also pulls better with the restrictor thing taken out of the end of the exhaust. 

Need to get the oil sorted in the forks and find some tires. Boysen reeds are on the way too. Ill update how those go. 

Anyone know of an expansion pipe that might work, besides those expensive vintage ones? Was the MX one any better?

Engine rattle sound. 

So I started hearing a rattle that sounding like piston slap. Like something metal rattling around in the head. 

I pulled the head and jug and everything looks new. No issues.  

How much play should there be with the connecting rod at the crank? Theres a little bit of a wiggle. 

Is there anything specific with these bikes I should look out for? The milage is so low I wouldnt think anything would be worn out. 

I also heard from someone else that it could be clutch related and seeing that I just changed the clutch it could be. The clutch plates are now aluminum which I guess could make a ringing type noise. I also didnt lock tite the threads on the bolts. Might go back in there and have a look. 

Gonna leave the head off till I hear back so I can check for whatever. 

Watched a video on checking the connecting rod and everything seems fine. So, slapping it back together. 

I'm still a few pages behind--story of my life--. Just looking at your pic of the clutch parts & pressure plate. With that type you need a steel in last or the drive is taken on the spring posts. So first plate in would be a fiber & last plate a steel,-- unless someone's added an extra steel in which case you 'could' put one in first. If it's in & running don't worry as never seen any serious problems caused by that. The alloy pressure plate wouldn't be quite covering the full surface of that last fiber but it'll survive. Also if you have clutch rattle at idle--more 175's than 125 problem, there's a huge rubber ring that stretches over the gear or basket & fits in between gear & basket to dampen any movement. Thought i saw something like that in one pic but might've just been a bit of a cable showing. Below is the Partzilla drawing "which is drawn wrong" & not the first time. Just things to trick us. Yep someone's been there before if those spreader rings are gone.

www.partzilla.com/catalog/yamaha/motorcycle/1974/dt125a/clutch

regarding the tube...I would look for loose spokes as a possibility also. 

Thanks. The tube was the tire spinning on the rim, it was torn at the valve.

Ok, so Im chasing this damn thing out with it bogging at full throttle. Ive taken the carb apart twice. Just did it again and cleaned every jet again. 

I pulled up a video on adjusting the needle because it seems like a rich problem, upon watching the video the guy shows pulling out the needle plate.

 

My bike has nothing. The needle just floats. I assume thats not good and that I need the plate right?

Right.