FMF Slip On says "the silencer you purchased will not fit on OEM"

[harley1-5]

you really need toplug chop before any riding to keep your top end safe

 

[tbrooks]

It won't take but a few minutes to take of the carb and float bowl to look at the main jet, running richer mix like 25-1 will help a little but you really need to plug chop to get it right

 

[harley1-5]

actually running heavier mix will make you run leaner.Youmust jet accordingly for stronger mix,and plug chop to confirm

 

[Blaaster]

I can't do a plug chop cause my quads at a friends and I'm riding with him tomorrow should I just run richer to be safe

What jetting are you planning to run?

Do a plug chop before you ride with your friend.

 

[OConnor Racing]

It takes less time to check your jetting than it does to remove the engine, pack it in a cooler, and ship it to me.

 

[rich1]

never assume the previous owner did anything..... but wrong, confirm for yourself !
that main should/may need bumped up to a 240/250 for the oil injection delete, to account for the new mixed in oil, which slightly reduces the amount of fuel.
then plug chop to confirm it's correct.

Amen to that ! Mine just had the line cut flush on the carb from the oil pump, and was not plugged !