AFAICT Yamaha parts have doubled in price and are getting to the point of being prohibitively expensive to maintain non running vehicles, or to complete basket case projects. I remember when TW rear fenders were around $60 now some are $160, and that wasn't that long ago, front fenders and side covers were around $30, now some side covers are over $100. I know because I used to buy plastics on ebay if they were NOS items, that was around 2004. Some sellers used to try to sell used pieces that they wanted more than the new cost for. I remember buying real nice Japanese pull offs(The Japanese use to pull their fenders off when they sold new TW's in Japan), and I remember being upset at paying $70 for a rear, when they were selling new white ones at the Yamaha dealer for $60 at the time. front disk hub used to be about $70, and spokes about $35...I'd hate to check the price of factory gaskets nowaday. Does anyone know what a brand new 1987 TW sold for? I bet it was well under $2000, I bought my 1982 xt200 for $1199 otd.
I see the Mikuni type we can use on the TK carb on eBay for $4.97 w/free shipping. This vendor has #130 & # 132.5, maybe others as well. Remember, Mikuni jets have a different size numbering system than our TK jets. link to eBay jets
So glad you mentioned that QWERTY! From all the research I've done I believe the Mikuni jets are aproximately one size larger than the TK jets. So like a #130 TK is roughly equivalent to a #128 Mikuni. Do I have that correct or is it the other way around ? This rule of thumb would help as a starting point for tuning with Mikuni jets.