What's this jet?

I had a spare 34Pict-3 apart today and the main jet had "104" stamped
on the top it.

1) I thought jets increased in increments of 2.5. Is that not the
case?
2) If that's size, it seems small for a stock 1600 doesn't it?

Any idea where that number 104 comes from?

cheers,
griff

p.s. Does anybody want to trade a 120 or 135 main jet for a 125? My
1600 has a Pict 30/31 that could use re-jetting to 125.

On Aug 9, 5:41*pm, griff > wrote:
> I had a spare 34Pict-3 apart today and the main jet had "104" stamped
> on the top it.
>
> 1) I thought jets increased in increments of 2.5. Is that not the
> case?
> 2) If that's size, it seems small for a stock 1600 doesn't it?
>
> Any idea where that number 104 *comes from?
>
> cheers,
> griff
>
> p.s. Does anybody want to trade a 120 or 135 main jet for a 125? *My
> 1600 has a Pict 30/31 that could use re-jetting to 125.


A lot of guys use a 130 main jet because of the ethanol in the gas.

http://www.vw-resource.com/additives.html#ethanol