Thanks RT
You’re the second person to mention the reeds
Im going to try to find a set of oem reeds.
Anyone on here have a set before I get on eBay?

Thanks

I mentioned the reeds but now that I know you've installed some sort of cheap reproduction carb with who knows what jetting or quality of build, I'd put the stock carb back on.

I may have stock reeds. I have a set but don't remember what they are from. I will measure when I get home.

I agree with Mark . The yambits carb is a chinese knockoff .
The OEM Mikuni carb is a very good unit . After a good clean ( an ultrasonic is good ) ,
and replacement parts if necessary , they are very reliable .
You haven't said what the main jet , slide cutaway and needle were yet .
The pilot and needle jet were correct for DT 175 A .
The square within a square symbol on the needle jet beside the O2
stamping is the genuine Mikuni logo . All your jets should show this if they are genuine .

Thanks guys
I should have known to not buy that replica crap.

Here is the slide and needle


Unfortunately I don’t have an ultrasonic parts cleaner to clean it up as it should be.
I don’t really trust my local motorcycle shop to do it as I know they won’t use oem Yamaha parts to put the carb back together.
Any recommendations on who can rebuild the carb?

All your parts so far look fine . To be honest , from what I've seen so far , it looks pretty
clean anyway . If you have a compressor , blow air through the jets and passages ,
and you should be fine . All stock Mikuni parts so far , so it shouldn't be much trouble
to get running right .
Set float arm parallel to gasket face , with float arm just resting on float valve tip ,
main jet # 160 , air screw 1 3/4 turns out from lightly seated . needle clip is already in correct slot .
The only unknown piece in there is the float valve / needle & seat . If that doesn't seal and shut off fuel ,
it may yet need to be replaced . If fuel pours out the overflow tubes once the fuel tap turns on ,
that's the sign it isn't doing its job .
Lastly check the starter jet in the lower float bowl is clear, as if it blocks up , you probably won't get it started .

Thanks swoop

Here are the float pieces

Reminds me of another reed story on a ktm125 about an "86 model i had to do the crank or something. Not being familiar with how they performed & only gave it a gentle ride down the paddock. But said it had no top end, or terrible anyway. Had original fiber reeds, that matted carbon fiber looking stuff but original. I rode it to sample the problem & flattened of early for sure compared to my "86 Kx125. So he got new reeds & it was a magic cure, just returned to normal . Think that was a case reed by memory on the ktm.

Thank RT
Im going to try to get a hold of the stock reeds for good measure.

The main jet says b145

Also,

In the service manual break down it shows the main jet at a different location than where it is on the carb i have.
Do I have a dt125 carb?

I don't think your main jet is a Mikuni one .
Float valve looks a bit cruddy , but may clean up with a polish , it might work fine .
I don't think I'll have any specs for the carb ID number . Someone else might have them on hand .
On the earlier ( pre DT ) 125 / 175 , they used the same bodied carb , with slight jetting changes
between them . The DT's could possibly be the same . It is worth checking out .
The earlier carbs had the side entry main jet .
With the side entry main , that O ring on the needle jet and setter is critical to good running .
If it is damaged in any way , replace it .