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Alright I'm having trouble finding the right jet kit for 750 twin csr. I have pod filters and open headers for exhaust so what jet kit so I need to get cause the throttle is just really sluggish.

Install a muffler

Nessism is correct - install a muffler; it is more than just a noise silencer. Otherwise be ready for stock KZ440's to run past your bike. You engine needs a predetermined amount of back pressure to run properly. Eliminate that back pressure and the engine will run poorly. Ed

Alright would any muffler work cause the reason I took the stock ones off cause they were just rusted out so they weren't any good

If you can't find decent used KZ750 mufflers on eBay or at a bike recycler you may want to look into a new set. Several places sell them. Here's one place that might be able to help you select a set that's good for your bike since they specialize in motorcycle exhaust systems. Ed

www.coneeng.com/motorcycle_components.html

Harley take offs can typically be found cheap. They are pretty small and easy to package too.