the Suntour Power shifter cable guide holes are 4mm across so as adroit says you'd need the stepped ferrules for it to function perfectly. these might be the ones you want, http://www.ebay.co.uk/itm/Bike-Cycle-Gear-Brake-Inner-Wire-Outer-Cable-Nipples-Ends-Tidies-Vintage-modern-/160800234715?pt=UK_sportsleisure_cycling_bikeparts_SR&var=&hash=item257070dcdb
@Mr_Bump started
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the Suntour Power shifter cable guide holes are 4mm across so as adroit says you'd need the stepped ferrules for it to function perfectly.
these might be the ones you want,
http://www.ebay.co.uk/itm/Bike-Cycle-Gear-Brake-Inner-Wire-Outer-Cable-Nipples-Ends-Tidies-Vintage-modern-/160800234715?pt=UK_sportsleisure_cycling_bikeparts_SR&var=&hash=item257070dcdb