jetting and needle question...?

[eprada87]

my mods right now are:

CPI inframe pipes

Open airbox w/k&n filter

stock carbs with 300 main jet and 25 pilot jets

2nd needle clip to the bottom(2nd closest to the pointy part)

gearing is 14f and 45r(duno why, i bought the bike like that)

 

When i first start it and go run it, it doesnt hit powerband in 1st or 2nd but in the rest of the gears it does. After it warms up, it hits the power band in all gears but it still seems to bog a little like if it isnt clearing out enough. i also checked my spark plugs and there a nice chocolate brown color. Does anyone recommend changing the needle to the middle? I have heard thats the setting to put it on but im not sure. im also at sealevel. thanks

[klotz_racr]

the problem probably is that you have DRAG pipes on a STOCK motor (just my guess) id reccomaend a pipe change in the near future, unless your planning on getting some more mods.

[Wildcardracing]

At sea level with CPI's you should be around 310-320 on your main. I would say 310 with the stock air box. Your needle should be in the middle, keep your 25 pilot with the screws out 1.5 turns should put you real close. You need to do a search on here and learn how to do a plug chop to verify your jetting. CPI's are a very pipey top end pipe and will not have a lot of power in the low end. I think what you're experiencing is a lean condition, which will be even more noticable on a cold engine. You also should be warming your engine up before you ride it.