Should I bother re-jetting?
Posted November 20, 2002 - 07:11 AM
1. Things that need to be fixed. and 2. Things that will need to be fixed after I've had a few minutes to play with them.
Should I step away from the carburator or put the OBELN Needle in? Does anyone else run this setup? If so what clip would I want to put it on and would a new main jet/ pilot jet be in order. Would the performance gains be worth the risk of getting tangled up in a potential tail chasing exercise? Any thoughts from you carb experts?
Posted November 20, 2002 - 08:51 AM
I'm by far the farthest thing from a carb expert but I can tell you this. My 2000 WR400 ran very good with stock jetting, but once I started to mess with it, it only got better. I'm currently using the EKN needle on clip 4, a 40PJ, 65PAJ(S), 158 Main Jet, 160MAJ. Not that these will work for you, but all the trial and error was worth it.
Posted November 20, 2002 - 12:48 PM
Swapping in a "E" taper needle for the stocker in a 400 is an old trick here at TTalk, and I don't think I've ever heard anyone say they were dissapointed in the results.
If your bike is jetted perfectly on the main right now, going with an "E" taper needle may require than you go down a size or two on the main.
Hope this helps.
Posted November 21, 2002 - 06:51 AM
Posted November 21, 2002 - 09:51 AM
Of course there is only one way to find out, but it is easy to get confused by changing a bunch of stuff at once. If you spend an afternoon changing one thing at a time and then riding if for a bit you will understand what is going on by the end of the day and should also have it pretty well dialed.
Don't pay attention to anything the bike does until it is fully warmed up.
If you have any problems getting the carb and jets in and out do a search or make another post, TTalk members that have jetted their bikes have a lot of tips and tricks to make it easier.
Hope this helps.
Posted November 21, 2002 - 11:18 AM
I'll eliminate as many variables as possible, and do only one change at a time. Hopefully the E series needle will improve the performance without creating any other issues.
Posted November 24, 2002 - 10:14 PM
Posted November 24, 2002 - 11:31 PM
i argued that the MJ had nothing to do with a 'D' becoming an 'E' needle but alas there appears to be an element of truth in it.
ELN on c4
if you have an open pipe i think that 162 MJ will do and if a quiet pipe go for 158MJ.
that should work first time out.
Posted November 26, 2002 - 10:07 AM