Complex sentence: Suzuki kept the SV650 profitable by scrimping on suspension so many riders replace the under-sprung and under-damped forks with reasonably-priced cartridge-simulator kits, and/or upgraded fork springs.
Split into simpler sentences: Suzuki kept the SV650 profitable by scrimping on suspension. Many riders replaced the under-sprung and under-damped forks with reasonably-priced cartridge-simulator kits, and/or upgraded fork springs.