Mmmm.... I might be able to help here
snail-cam adjusters and the brake hub are the two enormously radical visible changes that stand out. Another readily visible giveaway is the grease nipple on the swingarm. (torque settings changed for that bolt, too!) Technically, the outrageous increase from 32mm to 34mm carb and the altering of the advance from 18 (black CDI) to 20.5 degrees (gold CDI)... one of the breakthrough changes was removing the little clip tabs on the airbox lid! Of course the 9 vs 10 heat-range change can be spotted by the discerning Suzuki owner.
The dead giveaway on an Australian PE175N sold after 1st April was the tabs for the battery and blinkers that became mandatory in NSW. Hence also the battery and extra lighting coil.
Try to use the N pipe and muffler as they had smaller restrictors. (if they are still there at all) Engine was identical apart from a fractionally thinner head-gasket. I do not recall finding any changes in porting or piston for the C vs N.
A curious difference is the tank - seemingly identical, the earlier batches held 12 litres and later N's only 11.5 due to an increase in the thickness of the plastic.
The trivia stuff is irrelevant. For your question - same bike, 99.5% interchangeable.
Luke
