Your titles are too short. Fill up every character, those are valuable search terms you are missing out on. Put in the years the parts fit. 07, 08, 2007, 2008 for example. Think of other ways people describe parts. Some people say "crank shaft", others say "crankshaft". Put them both in your title. Cam shaft, camshaft.
Here are some words in your auction titles that nobody searches for:
assembly, pair, and, with. Leave them out. Use the space for search terms.
Think about a minimum price you will sell for. This:
https://www.ebay.ca/itm/Yamaha-PW-50-Handle-bar-pad/313037461018?hash=item48e27c961a:g:S1sAAOSwf11ee...
is wasting your time. After you pay the fees to ebay and PP, you'll have less than a buck for your effort. Better to just throw it away, or combine it with other parts you think a buyer might need with it.
You need to learn how to ship things.
https://www.ebay.ca/itm/Kawasaki-CSR-1000-Right-side-brake-lever/313037460859?hash=item48e27c957b:g:...
This can go in a padded envelope and go anywhere in Canada for less than $5. Buyers get put off by sellers that don't know how to ship efficiently.
On the same lever, what would the dealer charge for it if it was new? The auto wreckers charge 50% of new. Levers break every time you lay down the bike, so it should be a hot seller. Hot sellers can be priced higher.
