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and while I'm seeking info, throttle is very stiff ( single cable) the only spring I see is on the TB,
is there a softer spring made? or way to mod this one?
even with a fairly heavy spring, the throttle should be pretty soft. don't go and mess with the spring tension of the stock throttle body. your cable is probably sticky, or just badly routed. try disconnecting it from the throttle body and see if it's smooth or not. you should try wicking some oil down it or get a new cable. i like lokar cables for tpi, they're shiny and good