Scooterotica

mickdale wrote:

RBG wrote:How are people getting along with the Ebay adjustable jet, fitted and running well, easy set up and are they recommended?

The tube that hours into the bore looks shorter than the camlam one, might have to try and position it c nearer the slide to get it protruding enough

What carb are you fitting it to, I'm going to be looking at playing with a TMX 35.

Mine arrive, well impressed with the quality for the price, one of the few items I've bought for a Lambretta that I'm genuinely very impressed with the other is franks front disc and a Diablo tank.

RBG wrote:

mickdale wrote:

RBG wrote:How are people getting along with the Ebay adjustable jet, fitted and running well, easy set up and are they recommended?

The tube that hours into the bore looks shorter than the camlam one, might have to try and position it c nearer the slide to get it protruding enough

What carb are you fitting it to, I'm going to be looking at playing with a TMX 35.

Mine arrive, well impressed with the quality for the price, one of the few items I've bought for a Lambretta that I'm genuinely very impressed with the other is franks front disc and a Diablo tank.

either my PHBH or VHSH - was looking at pics of the camlam fitted ones on PHBH and estimating where mine yould sit - think it might be better if i m/c a flat on the outer inlet or come in at 45 degrees from vertical

yeah the diablo tank is about as good as it gets

I'm not sure the pic on the Cam Lam site is of the adjustable powerjet The position is what suits the space available (within reason) but this is how mine is fitted...

thanks for the pic soulsurfer, the tube on the greek one only goes about 5 - 10% in so i presume the jet will only come on at near full throttle

i might be able to mill a flat on the carb to lower the tube or go in from the side at 45 degrees to get the tube further in

cheers
mick

Been using one of the "greek" adjustable powerjet kits for a few months now, fitted to a 30mm PHBH on a tuned 225 rapido. The length of the tube effects at what throttle opening the power jet operates at, the adjuster effects the amont of fuel added. 1/4 turn equates to approx 1 jet size. So far i've managed to reduce my main jet size from a 128 to a 126. Running an AV266 with X2 needle, 40 slide, 55 pilot and 70 choke, open carb.

Hope this helps.

Ian "richie" Cunningham

Oh on a side note. Use the Dellorto float bowl with the overflow pipe and modify it for the powerjet take off, you want the pipe for the powerjet as low in the float bowl as possible to avoid air bubbles being drawn up the pipe on wide open throttle.

Ian "richie" Cunningham

thanks for the tip
i used the term greek to help eveybody identify the one i had - no offence meant to our mediterranean cousins

its a shame they dont come with a long feed tube and the user cuts them to the length required

cheers
mick

mickdale wrote:thanks for the tip
i used the term greek to help eveybody identify the one i had - no offence meant to our mediterranean cousins

its a shame they dont come with a long feed tube and the user cuts them to the length required

cheers
mick

Hi Mick,
I called it the Greek kit for the same reason.

Ian "Richie"Cunningham

I'm coming to this thread pretty late but you guys are discussing an issue that I'd like to know more about, that being the issue of brass tube length/position in the Venturi.

I've fitted a Camlam add-on PJ and positioned it to reach the centre of the Venturi, which brings in the enrichment way too early, making things too rich at low throttle positions, which is killing performance and progression. Out of interest, I looked at the bellmouth and brass tube length of my old Mk2 Amal and that only reaches half way to the centre of the Venturi, functioning well to enriched the top end only. The difference being that the Amal tube comes in from the top (vertical) and reading up would suggest that this is important as it relates to the air intake being restricted at the top of the Venturi until the slide raises above the brass tube at 3/4 and above. If this is the case then a tube coming in on an angle will influence Powerjet function.

It seems as though I will need to employ a combination of winding out the Powerjet and cutting it shorter, however, I don't want to cut it too short and regret it. What have the rest of you done and have you managed to find any good info/websites?

Thanks in advance.

Adam

https://www.ooracing.com/store/carb-bod ... r-jet.html

This link should show another pj carb body with a short brass pj tube, which I understand will bring in enrichment later, but this confuses me slightly as surely the purpose of a pj is to kick in later in the progression range, so why produce a pj with such a long tube? That said the Lectron pj carbs have a tube that comes down to the centre of the Venturi.

Certainly my current tube length, to centre, is causing enrichment to happen way too early on my motor and I'm having to close up the adjustment completely, otherwise it just makes it boggy from less than half throttle upwards!

Adam