What companies are out there that supply heavier rear springs? Teknik in Australia did have stock but not currently, I’m chasing a heavy spring due To long range tank & luggage
I easily fit an Ohlins 06310 series coil to my shock:
https://ttr250.activeboard.com/t66174628/rear-coil-spring-rate/?page=1#comment-66237000
https://www.ohlins.eu/en/products/packages/ttx-flow-series-06310--35/
stiffest available is 62 N/mm (06310-15). For some reason Ohlins doesn't list them on their page but you can find them from retailers.
2001 TTR250
Phoenix AZ USA