Hans, yes, it is a 50cc Athena on a Malo RV with 19 carb. It is for 50cc cross racing. :lol
At the moment I only miss the choke for the carb to make first start.

Tnerual, this engine should run like hell if I didn’t make a mistake. A friend of mine is already driving the same setup in a modified cross Bravo on races.

Maybe I can open a own…[Lees meer]

Sounds good :thumb

Thanks for that infos.

Ah,ok.
To use the larger range of the clutch pouly, is a Malossi or Polini variator able to support that?

Thanks for the positive reactions.

tnerual, it is possible to use a 38-43mm cylinder in two ways.
First is, put it on and finish. Sure, there is a small free room between the cylinder sleeve and carter wall but I think it is no big power loss doing that.
I have put a 50cc cylinder on a Malossi RV. This engine will be finished in short time.…[Lees meer]

😀 I’m not sure if the carb postion is ok for a Si subframe because there is no space even in the Ciao frame for it.

Need to check that after my vacations end of this week. 😉

haha, I think Sprocatti is cool stuff.
And this carter already has all the basics for big cylinder, longer stroke kruk, large inlet and large outlet.

It took me long time rework to modify a Polini EVO carter set to fit a long stroke kruk and a 48mm Simo cyl with 30mm outlet. But the inlet is still small on that.

So Sprocatti did a great…[Lees meer]

no, bought it from gab_pei here on the forum.

Just a quick check about possible stroke krukas for that carter.

I can fit a 44mm stroke krukas, very nice. All that separates it much from a Malo RV. 😀
But this kruk does not have the kick drive possibility.:con

jep, is similar.
But it is large enough for a 48mm cylinder, the Malo RV is not large enough for that.

Also there is enough space for a 30mm outlet, the Malo RV need to rework for that.

I did not measure the carter inner diameter for the krukas, but it could be that there is also space for a larger stroke krukas. But need to confirm that.

thanks Marco.

Comming now closer to the end, some minor problems that I didn’t realize so far working on major things. 😀

Putting the O-rings around the cylinder pins is no big deal

but how the hell can I make the O-rings stay in their groove of the head during mounting the head to the cylinder?
This two rings always jump out of the…[Lees meer]

short update:

fork in blue

and exhaust adapter finished 😀

I know the exhaust is not good but for a start it should work. Is there any exhaust you could recommend for that engine?

misterd11, I’m not sure if I understand you right.

On the right side of the frame I will close the holes what were made for the Simo side inlet.

Then I planed to close the front corner around the cylinder like needed for the 4 tabs Simo. Also I could make two metal sheets like painted in the pic.

Is that what you mean? Or what would you…[Lees meer]

today worked a little with the flex 😀

After making cut after cut and hole after hole the engine fit into the frame now.

But for the carb I will need to cut this nice tube away :'(

nice, thanks for the detailed info :thumb

I got the smaller one for my rear wheel. It was packed very well, never have seen that kind of packaging on other tires. =)

and so it looks on my rear wheel

Looks clean :thumb

ah, cool, thanks. :thumb

yes, I think so.

Also found some black cover plates for the wheels. To me it looks not bad combined to the frame blue. 😀
But the tire has wrong profile. I will look for a bigger one with race profile.

And I can use my CNC milled bearing triangle now

Thanks for the infos.

I bought the Citta Tecno from JMPB, that fits perfect, also with the kick chain wheel. :thumb

Aah, I see nice stiffness ribs welded at the rear end of your subframe. Very usefull :thumb

short update and design change 😀

Got this nice reinforced frame from Bartjee. Thanks again Bart, really a nice frame. :thumb

Nice to see you busy again. :thumb