I missed to call Mikuni.
But this isn't a problem, because I've checked the parts list/exploded view from the TM28-1.
-> You can see it here: http://www.mikuni-topham.de/ENGLISHSITE/Spare_parts/Seite69_TM28_TM33_Ersatzteile.pdf
You can see on number
44 - Pumpenkolben - piston pump
46 - Pumpenstange - rod pump
The TM28-1 does have a pump.
I am using the VM28-418 on my bikes, because these carb fits really easy on the TW (with 5LB rubber parts/connectors).
This carb is working well, but I think the TM28-1 should be work better.
I had to reject your payment, because you've send me the wrong amount with the wrong currency.
You have to send 190,67 EUR incl. PayPal charges, because I will receive just 182,88 EUR.
To send a USD amount isn't good, because the exchange is changing too fast.
I will send the order, when you've send the EUR amount.
PS: I can't combine a order, because the Croatian customer will place his order a bit later, because he's working for the next 3 months on a ship.