Re: Throttle question
If everything else is good and you've been pleased with the way the bike runs, just replace the cable, if that's what broke. If the twist grip is still good and the engine runs good, don't mess with success. Replace the cable and enjoy your bike.
Like the saying goes: If it ain't broke, don't fix it.
Aftermarket 'performance' parts are not always what they're cracked up to be. Ask any CNS carburetor owner.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"