Mysterious Pilot Air Jet 2 on WR400 FCR39H carb?
Posted July 29, 2009 - 03:14 PM
The only variations on my carb from stock are:
Jet needle DTM-3 OBDTM
Pilot Jet #45 #48
Starter Jet 1 #65 #60
I have an aftermarket header and FMF e series pipe (12 disks)
Has be VERY tough to start....so I am replacing all jets (with current sizes), needle, valve seat, gaskets, a c pump diaphragm, cleaning. Previous owner said bike ran well with before. I also changed the exhaust can to a auto decompression with correct .20 valve clearance as Hot Cams instructed...Intake clearances were in spec.
Any insight appreciated.
Thanks so much.
Posted July 29, 2009 - 05:03 PM
Posted July 30, 2009 - 04:43 AM
I just re-read this part. If it's tough to start with the choke, this may be why. The starter jet is only for the choke circuit. #60 seems pretty lean. If not, try turning the idle up a bit. The pilot should be good between the 45 and 48.
Has be VERY tough to start....