No i need to re-jet?

Hi,



I have a 07 v star 650 and i have bought the vance hines Short Shots Exhaust i have not put them on yet some people say i should re-jet and others say it may be ok but if i don't will it hurt the engine? or just run bad



Thanks



MattNo i need to re-jet?
Best bet I'd to go to Vance %26amp; Hines web site. I think that they will recommend you buy a fuel/ignition management system if it is injected [like Cobra or Dyna] and if it is carburated that you buy an ignition management system. You do not even have any jets if it is injected. Jets are only in carburetors. If you have a carburetor you might need new jets if the bike comes that drastically detuned from the factory. You will need jets 1 size bigger. Wait and see after you get the pipes/ignition set up installed. If the engined is starving, running hot, you need the jets. Harley's come very detuned from the factory in order for them to meet emission standards. That's one reason everyone pipes Harley's.No i need to re-jet?
if you put them on %26amp; then run the bike you can check the color of the spark plugs to see if you need to rejet...



run the bike on idle for 5 mins.. then check them...



then run the bike on the road at half throtle for 5 mins ... then check them..



then run the bike on full throtle for 5 mins %26amp; check them..





the plugs will tell you if the mixture is right... and where you need to change to make it run well............No i need to re-jet?
It will prob lean out and run hot with a loss of power and yes it will wear out faster
If it's fuel injection, which I don't think it is, you will need to re-jet. You're changing the back pressure which will lean the bike out.