Jetting Question...Too Lean? Immediate help, please

[cyphertext69]

Alright, so I put my 28mm carb on last night and from what I could tell before it got to normal temp, it ran fine...

Today took it for a longer ride and got into it. At WOT, it acted like it didn't have fuel then back fired, but up to 3/4 throttle, it was good. I know it's the main jet. However my question is I don't know what jet to put in it.

I have:
180
200 Installed
240
280

I can't figure out which one to put in to make it run good.

 

[randelator]

with the list of your mod i go 280 and do a plug check you better go big and come down

 

[cyphertext69]

with the list of your mod i go 280 and do a plug check you better go big and come down

Alright, I will go check it out...tomorrow I will be riding hard all day and let you know what happens.

How can you tell by the bikes reaction whether or not it boggs or is running lean?

 

[randelator]

whene its lean ,do thats test ,warm up the engine to normal temp, then snap the trothle if it bug than go its lean if it go right up you are almost there!! but nothing replace a good plug check bring a couple new plug with you!!!