KTy

Nop, I will !

Okay, thank you

As I desperately wrote here , I need to find a jetting trade off between two combos on a PHBH 28 with mazzu crank, simple Polini manifold, adjusted Polini 177, Leo pipe and ignition is set to 18°. * Cutaway 40, main 130, slow 55, X2 needle, needle clip 2nd from top, AV262 (actually it is a CF262, discussion here) -> engine runs perfectly at low and high RPM, too lean at upper-mid RPM (I almost seized) * Cutaway 40, main 130, slow 55, X2 needle, needle clip 1nd from top, AV264 -> engine runs perfectly at low and high RPM, too fat (4Ting) at lower-mid RPM. I tried a 50 idle jet, "4Ting" is still there around 30% of the throttle. Is there a compromise on the needle, or the cutaway, or do I have another issue, like an air-leak, faulty carb... etc Reading from there, my understanding is that I should try an X7 needle.... Thanks

Alright for a squish of 1.5mm. What is the original DR squish size ? By the way, the polini head is really better than the DR one ??

For a gentle daily rider (DR + Popo head + SI2020 + original Sito Exhaust), what is the best squish any risk ? ~1-1.5mm ?

I want to know if there are simple plug'n play experience... I read about it here on the GSF, but I just want to be sure it's working fine without any modifications...

Is it really plug'n play or do I have to add a gasket or something ? (because the squish band of the Polini head is ~0mm) Thank you

I just realized it's the Polini Rotax 127 one... Congrats Gerhard Wouldn't you have ever said that water cooling was for pple that did know how to tune an engine ??

hum...kay I have put the needle clip at the top, engine is still 4Ting around 25-30% of throttle, that's annoying. I will have to see if it's too lean at mid-RPM ... Knowing that with CF262, X2 needle and needle clip 2nd from top it was perfect except too lean between 30% to 70%, what can I change ? Smaller (30 ?) throttle Cuttaway ? A magical needle ?

Proma... Looks "good"... that's all probably ;)

I will once I have finished my relocation to.... Villach, Osterreich ! OffTopic OFF

My beautiful engine could 190°/130° Oh well

Errrrrr I don't get it, it seems everybody is running a Franz exhaust ?! Where can I buy/order one ?

Ok... I was rigth to be a little paranoid... I was still driving with the following setup on a PHBH28, main 130, needle X2, needle clip 2nd from top, atomiser CF262 (=AV262 ? See here), idle 55 and 40 cutaway. Adjusted Polini 177, 18° timing and Leovince exhaust. A little rich at low speed, seems okay at full throttle, hard to tell in between. I also mounted a KOSO II rev-counter that is also a nice temperature gauge. I went on a highway (limited to 90km/h) for the first time since I finished my running in. I was gently following cars, the throttle opened between 50% and 70%, keeping an eye on the temperature. After 30s on the highway at constant speed, I knew something was wrong because the temperature was increasing dramatically. I kept driving for 1 or 2 more minutes, temperature raised up to ~130°C, I even had the feeling that I was hearing some knocking... I was psychologically resigned to seize .... And I almost did !! The engine died, I manage to engage the clutch immediately, I waited about 10s freewheeling, then I re-engaged the clutch, the engine started and I parked. When I started the engine, the gauge was reporting 145°C, I cooled down the engine with some fast ON-OFF throttling, down to ~90°C. Just a note about the temperature reading: I almost sure it is at least 20°C *below* the real cylinder head temperature, it is because of the sensor I am using. I have another temperature sensor, a thermocouple one this time, I will try to measure with it later. So, I get back home with no problem; indeed I could keep the engine below ~100°C with either 0-30% throttle and 70-100% throttle driving. Then I changed the atomiser for an AV264 and I put the needle clip on the 3rd position from top... Impossible to drive, 4Ting all the time, except at 70% of throttle :) So I put back the needle clip to the 2nd position from top, and I am driving with that since then. What I can say is that the engine is smooth in acceleration, but it usually rattles at "constant speed" between 30% and 60% of throttle. I went again on the high-way in the same environmental conditions , and followed cars at 90km/h like the other day, throttle opened between 50% and 70%. This time I was 4Ting a little bit from time to time, but the temperature was kept down around ~80-90°C. So here is my question: How is that normal that switching from a CF262 to AV264 atomiser makes me change from "engine ready to seize running at mid-rpm" to "engine almost constantly 4T at mid-rpm" ... ??? Please, explain to me !! Newt move is to lower the idle jet to 52 and/or to find another needle more appropriate ! Thank you for your help

That was my question first http://www.germanscooterforum.de/index.php...t&p=1338079

momo, please add another "4. DRT" for me (that makes a total of 2).

I don't exactly know how they work, but the T5/Hercules is probably analog electronics. I will do it digitally, that means that I will "simply" count the number of waves per second, taking into account the number of coil of the stator. Exactly like the GSFDyno by Atom007, I designed the latest interface circuit, the error will be near to zero.... By the way, I'm pretty sure it doesn't really mater for you if you reach 9566rpm or 9563rpm, rigth ? This project is a really simple circuit and the software is also easy to write, I just need some more time... :grr:

Alrigth, I will be doing in the near future a prototype for a simple and easy to use RPM counter with a small LCD display, with the possibility to plug an EGT sensor, a CHT sensor and speedo input. It will powered on the AC light, no battery, few wires... vespa/lambretta/whatever. Schuss,

When you have AC electricity, it's easy to know the RPM of your engine ;)

Okay, that's what I wanted to hear ;) So, the rest has AC ligths... Thanks

Alloha, I have a small question for you Lambretta's guys :D Is the electricity for ligths on a lammy AC or DC ? What is the most common ? Can you find AC current near the handlebar ? Strange questions... KTy

There are some interesting news from here: http://lnx.et3.it/phpBB-2.0.17/phpBB2/view...&highlight= Let's wait and see...

I must be stupid but I can't find anything about smallframe exhaust... :plemplem:

Sorry for the O.T... Is there any dyno of the S&S exhaust.. .? It is already available ?