Dealer is feeding you shit. A slip on will not require a rejet on the 500
Hell, rejetting in general doesn't do jack for power on this bike: it's maxed from the factory.
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2012 zx-6r | 
2009 klx250sf | WPS Handguards | Fly Racing Bar | Pirelli Sport Demon
2008 zx-6r | K&N Air | Jumper Mod | Pilot Powers -- RIP 8/4/11
2001 ex-500 | FOG Mod | -1/0 | SV650 Shock -- SOLD
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