Singer 522?

Just cut them out and throw them away.

They're Capacitors not Resistors.

Capacitors can eventually decompose and smoke - the oil inside burns and bursts out.

Your foot pedal does not need a capacitor - they're a hang-over from previous times intended to reduce electrical interference to radio & TV.

Good Luck...
June 2016

Based on info from some other suppliers, try this:

http://www.ebay.co.uk/itm/Safety-Capacitors-MKP-0-1uf-104K-100nf-275V-5-Pack-UK-Seller-Free-P-P-/262202400612

XXX
June 2016

I wonder if this is the "resistor" to which you are alluding:

http://www.singermachines.co.uk/sewingmachineparts/foot-controls/capacitor.htm

For a simple 275V capacitor it seems well over-priced but I can't make out the capacitance value to offer you an electronics industry equivalent.

275V is an absolute minimum, IMHO. If you can get and fit a 350 or 400 V rated item, so well and good

XXX
June 2016