450 Carb access for jetting
Posted January 30, 2003 - 09:36 AM
I'm also going to check the torque on the flywheel nut. Do I hold the flywheel steady by being in gear and locking up the rear brake? Hmmmmm Could I shear the woodruff this way?
Posted January 30, 2003 - 10:48 AM
Posted January 30, 2003 - 03:53 PM
Posted January 30, 2003 - 06:56 PM
I just got in from the garage and it is relatively easy.There is no need to totally remove the carb to do jetting changes.
1. Remove the Hot Start from the shifter side of the carb.
2. Remove the two fasteners holding the electronic gizmo to the frame on the Kickstarter side of the bike that prevents the carb from rotating.
3. Loosen the boot clamps on both ends of the carb and rotate the bowl toward the shifter side of the bike. You can then get to the bowl screws and change the jets to your liking.
Note: All of the above is a little easier with the seat and tank off the bike, but now that I've done it, you could probably get it done with the tank and seat still on if you like.
Good Luck and be carefull cracking loose the bowl screws. I stripped out the phillips head on one even with a newer screwdriver. They seemed a little soft to me, luckily I had some "spares" in the bin.
Posted January 30, 2003 - 07:42 PM
. i only switched the main jet up to a 155 the bike idled alot better.
The main jet has no relation to how your Motorcycle will idle. You should be able to change your main jet, pilot jet, and starter jet without touching anything except the seventeen mm nut on the bottom of the float bowl.
You can also change the needle clip settings by slacking the throttle cables, airbox boot clamp, intake clamp, and fuel line leaving everything else intact. Takes about five minutes.
Posted January 30, 2003 - 11:13 PM
Posted January 31, 2003 - 05:52 AM
Why did you take the bowl off? You could not get it through the hole?
Who are you quoting?? If it's me, I did not take of the bowl. I removed the seventeen mm bolt at the bottom of the bowl.
Posted January 31, 2003 - 06:08 PM
Posted January 31, 2003 - 08:50 PM
If you are only working with the Main and the Pilot jets, then its fine to just remove the bowl cap. But if you also want to change the starter jet to a 72, you need to get the bowl off to do it as it is to the side of the white plastic piece and not accessible through the hole.
I'm going with "utvols" recommended 160 Main, 48 Pilot, 72 Starter jet, 1 3/4 turns of the pilot screw & stock needle @ position #4, Grey wire disconnected. BIG DIFFERENCE & HIGHLY RECOMMENDED for the up to 5000' elevation crowd !! The bike rips hard now and starts easily !!
Posted February 01, 2003 - 03:33 AM
Posted February 01, 2003 - 10:28 AM
By. "Rainman_WFO"; I'm going with "utvols" recommended 160 Main, 48 Pilot, 72 Starter jet, 1 3/4 turns of the pilot screw & stock needle @ position #4, Grey wire disconnected. BIG DIFFERENCE & HIGHLY RECOMMENDED for the up to 5000' elevation crowd !! The bike rips hard now and starts easily !!
I am running my WR426FP uncorked, lid removed, gray wire mod, MJ #168, Needle Clip position #4, PJ #45, Air/Fuel mixture screw 1 and 3/4 turns out, hotter spark plug, and the rest is stock. Runs great here in Utah. 4300 ft. plus above sea level.