MOPED ARMY

Are you sure? Here is my setup:

I'm running a Dellorto 15.15 SHA (#80 jet) with the "bendy" 15mm Minarelli/Puch intake that 1977 sells. I put on a K&N style metal mesh screen filter. I'm also running the Puch LeoVince exhaust.

My pipe feels like it hits right after the variator is all the way open. Obviously your pipe will hit differently since you have the Mamba. One thing I did notice is that my pipe hits FAST and HARD due to the gearing I'm running right now (14x32). I feel like I'm getting to just over 40mph. If I had to guess, I'd say 42mph. It seems like you should be getting a lot more than that since I remember you saying that you are running a smaller rear sprocket.

What is your whole setup right now?

Nope.

Reused the one that came with the Polini.

I cut my own gaskets for everything. That shitty little thin paper gasket that comes with the 75cc Polini kit is worthless. I use a thicker gasket material. The black stuff that they sell in rolls at auto-parts stores.

68 jet seems low on a 75cc cylinder. Have you tried putting in a bigger one just to see what happens? I mean, I think I'm running rich with the 80 but I'm not 4-stroking at all.

_68 jet seems low on a 75cc cylinder. Have you tried putting in a bigger one just to see what happens? _

I am going to try that next. Also, a friend has a 16/16 I will try.

I just rode it home... it sure pulls the hills nicely.

Yeah I need to pull my plug and check it out. I have a feeling its a bit rich. Still breaking it in a bit though.

hmm. also. it might be different because yo're running a variated minarelli, but if i geared my v1 like that it would never get close enough to hitting the right rpms to hit the powerband. try gearing down to allow your motor to find those rpms sooner. the powerband "hit" is based on frequency that's made by rpms. i'm geared 10x32 on my v1 polini, 20mm carb and intake, high comp head, motomatic n8p. great low and midrange and 55-60mph all day on the top end

V2 and V1 gearing are way different.

a move up from a 16 sha to a 21phbg was a gps'd 7mph increase.

You went from 14x32 == which is a .4375 ratio to 14x22 with is a .636 ratio. That is a HUGE jump. That is 45% taller gearing. Before you were going 42mph. With the same rpms the new gearing would take you to 62. Unless you are really trying to go 62, I would try lower gearing... or tune you variator to shift into the powerband.

ask mopagen about getting an EV pipe..

fred

the pipe not hitting is all in the gearing. your pipe does hit, but much too early. when the variator is fully open the gearing is either too tall to make the RPM to get into the pipe, or the RPM is too much.

wow commas are good. there should be one before the again or maybe a period. i have no idea on grammar. or just delete the again if you feel like. this is why i would like an edit button

I'm waiting for his response to my email...

I am with Peter with the variator not being tuned to hit with your setup. Gearing will easily be overcome with the properly tuned vari