Carb Tuning after Pod Filters

All photos are when I first took them off the bike. Ill post more with the air pods when I take them off again to fix the jets.

 

Anybody in Western Washington there is probable another thread for this.

 

The easy tell is the location of the idle mixture screw.
Hitachi has them just to the left of the enrichment plunger.
Mikuni has them out on a "peninsula"

Another easy way is to look for the Hitachi logo cast into the side of the carb bodies.


That won't tell you which model of Hitachi you have, but it will tell you which ones are not Hitachi.

 

Hitachi logo located!!! Ok so now the question is how much did Yamaha cross over between the 2 brands.
Jet kits were ordered off of amazon and no brand specified so I wasn't ordering "Mikuni" kits. Still going to change back to original jets.

 

In terms of the carb parts themselves? Not a bit. Carbs were delivered from their respective manufacturers and Yamaha put them on motorcycles as-delivered.

 

You're in the US, so I would recommend getting any bits from @chacal , including jets. Be aware that fitting pod filters changes (reduces) the suction pressure upstream of the carb, which if nothing else will affect the slide height (since this is lifted by vacuum, more precisely the differential across it). So the whole fuel metering function of the needle in the emulsion tube is upset, or at least changed. changing idle and main jets alone is unlikely to fix a big hole in the mid range. You really need an adjustable height needle, maybe with a different taper.
Just my opinion, of course.