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View Full Version : What jettin on a 416ex



400ex18
04-10-2007, 11:26 AM
hey i have a 400ex with 416 kit, i never messed with the crab! so i was just wonderin if i should change the jet or leave it alone! my 400 runs good, but i was wonder if i could more power do that!

Honda#4
04-10-2007, 12:05 PM
Whats your current mods list and your jetting specs?

blasterandy
04-11-2007, 08:45 AM
yea current mods alt above sea level. and average temp. just about all the main contributers to this site will be able to accuatly guess your jetting.

400exstud
04-11-2007, 08:13 PM
Originally posted by 400ex18
hey i have a 400ex with 416 kit, i never messed with the crab! so i was just wonderin if i should change the jet or leave it alone! my 400 runs good, but i was wonder if i could more power do that!

YOU MUST REMOVE ALL CRABS! This is vital if you want to get max power.

Now on a serious tone, the first thing that you should do is listen to it. Does it ever spit/sputter/or sound like it is flooding? This would mean that it is rich (not likely in your case). Does it ever backfire or pop really loud? -->Lean.

If you are really curious, tear it open and test a few different sizes. The stocker is a 148K. You may want to try a 150K, 152K and a 155K if you don't have any other mods.