Is 162 MJ to low for WR250F?
Posted 09 October 2003 - 03:34 PM
I just put on a ZipTy fuel screw. My 'factory set' position was 3 1/2 turns out which is rich as I understand it.
Should I go richer on the main jet and needle position and turn the fuel screw in to lean it up? The instructions with the fuel screw say if more than 2 1/2 turns out go bigger on the pilot jet but the extra pilot jet that came with the bike is smaller.
I've tried to download the jetting spreadsheet from Thumperfaq but I don't have Excel so it won't work for me.
Any suggestions will be appreciated. My bike runs pretty good but I don't want to blow it up.
Posted 10 October 2003 - 01:11 PM
generally, you can go mega lean and not hurt anything.
i know what my bike does on an Exhaust Gas Analyzer and it is quite shocking just how low you can go.
btw, the leaner you go, the more overrev hp you make (to a degree).
in my dyno tests, i gained 1.1hp (past peak) by going 4 sizes smaller on the main and i never went under 5.3% CO!
the fuel you run can also make a BIG difference.
Posted 10 October 2003 - 01:26 PM
Posted 10 October 2003 - 01:49 PM