The original 32mm carbs that were fitted to the GS75X engine were heavily corroded and I obtained a set of alledgedly good 34's to go with the R701 engine now fitted.
The slides are coated in a black coloured substance that did not seem to be affected by ultra-sonic cleaning. But it shows signs of wearing away. And light scraping with a thumb nail will remove it revealing clean alloy underneath.
Here are a couple of photos to show what it looks like:


Has anybody seen this in the past? Should I clean it all off? Or should I use a spare set of slides and diaphragms instead?
Obviously the slides form the 32's wont fit. Plus if I use spare slides, what needles should I use?
Cheers
