Specification recommendation

[bmarx]

I have a 1998 Yamaha GP800 that has dual Mikuni 46I Super BNs with Riva flame arresters on it. Does anyone know the correct high jet, low jet, needle valve, and spring weight for this setup? It currently has:

Highs 142
Lows 90
Needles 1.2
Springs 115


Also what should the high and low adjusters be set at?

Thanks in advance.

[1200ks]

Re: Specification recommendation

I have a 1998 Yamaha GP800 that has dual Mikuni 46I Super BNs with Riva flame arresters on it. Does anyone know the correct high jet, low jet, needle valve, and spring weight for this setup? It currently has:

Highs 142
Lows 90
Needles 1.2
Springs 115


Also what should the high and low adjusters be set at?

Thanks in advance.

If your only mods from stock on the engine are flame arrestors then you will most likely still just run the stock settings (possible 1/8 turn more open on the highs). Always better to start on the rich side then tune down to optimize.

Look at this link for the oem stock settings:

http://server1.sbtontheweb.com/forum...ad.php?t=13981