Pipe Swap...Rejetting Necessary?

[techmaster330]

Hey guys i was wondering if i would have to rejet the carb on the 200x I'm getting to go from a Cobra pipe down to one of the DG pipe that are shown below. I'm not good with any of that kind of technical stuff so any help would be appreciated

This is the pipe (I think) that comes on the 200x I'm getting from Goat:
http://www.denniskirk.com/jsp/product_catalog/Product.jsp?skuId=44145&store=null&catId=&productId=p445877&leafCatId=&mmyId=
These are the ones I was thinking about maybe switching to since the one on it is way to loud to right at night:
http://www.denniskirk.com/jsp/product_catalog/Product.jsp?skuId=444048&store=null&catId=&productId=p444048&leafCatId=&mmyId=11865

http://www.denniskirk.com/jsp/product_catalog/Product.jsp?skuId=44542&store=null&catId=&productId=p44538&leafCatId=&mmyId=11865

[KASEY]

if you were jetted for the cobra... i would think it will be ok for a DG ,, but to be sure i suggest a new plug and a watchful eye on the new one for color ,,, if the motor is basicly stock i say no worries,,,,

[techmaster330]

Alright thanks, its the Lifan one that Goat built so its still completely stock I think

[Yamada]

you may have to check your jetting because of the altitude change.

[techmaster330]

Oh man I never even thought about that, I might have to learn how to jet now...

[Dirtcrasher]

I think your DG is gonna be fairly loud too bud.....

[techmaster330]

Well that kinda sucks then cause I wanna ride at night but I don't wanna make people mad cause of the noise at 2 in the morning...

[oscarmayer]

stock pipe the quietest i have heard.