400ex jet

[TR33_FRoG738]

i put a higher compression piston in my 400ex and now when i drive it roughly every 30 seconds or so it dies down like it is out of gas then it picks back up again after about 5 seconds of that, i was wondering if the piston would require a bigger jet or could it be because i dident get it back in time just right?

ps. it has a pipe on it but im not sure if its full or slip on

[oxidized_black]

most pipes will recommend a rejet. search the manufacturer and they will tell you the size best suited for that pipe on your bike ...

Edited August 6, 2013 by oxidized_black

[TR33_FRoG738]

well the thing about it is that it ran fine before i put the piston in it

[CRAZYKIWI]

well the thing about it is that it ran fine before i put the piston in it

U may have an airbox intake restriction as well or u might have accidently restricted the fuel line when u put it bak 2gether??

[TR33_FRoG738]

U may have an airbox intake restriction as well or u might have accidently restricted the fuel line when u put it bak 2gether??

ill go look and see if i can find anything like that, do you think that carb cleaner would help?

[CRAZYKIWI]

Maybe but I doubt it unless it was a long time since it was last running?