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Restrictor size for Novarossi PLUS 21-5KT

Restrictor size for Novarossi PLUS 21-5KT

Old 03-06-2009, 03:34 AM
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Default Restrictor size for Novarossi PLUS 21-5KT

Hey all,

Finally got my Hyper 9 running a Novarossi PLUS 21-5KT started up and not getting stuck at TDC.

Just been reading up abit on restrictor sizes but nothing really specific about what size is best for what circumstances except for larger is better for WOT and smaller better for acceleration and fuel economy.

Can anyone recommend a restrictor size to run in my 21-5KT for a pretty tight track that only has one section that you would get up to WOT?
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Old 03-06-2009, 08:11 AM
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I prefer to run a 7.5 on smaller, super tight tracks; but run an 8mm most of the time.

There is no perfect answer for "what size is best"; just the general rule of smaller yields more torque and less overall power; thus...a touch more mileage.
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