Jetting all day, Jetting all night

After spending a couple of hours fiddling with the jets in the OKO 28mm carb, I cleaned up and wandered down to the forum to see the band 'Jet'.
My friend Steve plays keyboard in all of their shows (and on the record) , so needless to say there was some boozing to do. So busy was i at Jet that I forgot what jets I had put in earlier in the evening.
Fortunately when searching the internationalscooterbbs for jetting info, I found a post i had made before going out indicating the jetting changes I had made.
132 main
42 pilot
air screw 2.25 out
GKB needle (randall at Scootrs says it is an OEM needle, but I will have to research exactly what that means)



NOW! My worry is fuel starvation and I am deciding If How and When to install a vacuum fuel pump. These work by tapping into the pulsating crankcase pressure, normally involving drilling into the engine cases. Because of metal filings, this should always be done with the engine in bits. (a drag).
The online scooter community seems to be lacking in info as to whether the vacuum line can be taken from the inlet manifold instead of the cases (on a rotary valve motor). A go-kart guy gave me a definite NO, but some online say it is possible. I know it is cool in the reedblock on a reedvalve setup, so maybe people are getting them confused.
I will definitely tap the manifold and do some testing with fuel cans at different rev ranges. The pump is on order.


~ look at the brass fuel line nipple sticking up to the left of the pink hose. The base of that is at the same height relative to the fuel tank as a stock carb. If this can be swapped for an l-shaped fitting, the hose wouldn't have to rise up and down onto the nipple, creating the same fuel flow as for a stock setup. The pump setup allows for long range tanks, auxiliiary tanks etc, but at least if the flow can use all the main tank, I am not in danger of fuel starvation at 1/3 tank under load which could lead to leaning off and seizing.