MOPED ARMY

Fingered intake, widened & squared exhaust up a bit. Nothing crazy. With vertex piston and a countersunk head would rev out 13k+ on derbi piston port. After blowing those cases, slapped it on an e50 and still chasing getting it dialed in. Stroker crank fixes spacing issues with vertex piston, so un-countersunk head to match flatter piston profile. Broke skirt on piston so waiting on parts atm

Ring gap rides in the middle finger. Seems weird at first but polini is like that and it's fine. I might be able to get a bit wider on exhaust but don't wanna yet

I think I went too big on windows

I have seen the idea of open transfer Gila before but that intake is nuts.....

Why would u do that 😂

I'd like to try an open transfer Gila, I've contemplated making the alteration time and time again but have never pulled the trigger.

This is my 70+ MPH cylinder, nothing crazy to look at but its fast. Very nice case match, cylinder is pinned to the case, cases are pinned together, everything has been squared up, cylinder skirts matched to the transfers in the cases. Port timing, port area & volume all modified. Squish, piston height in relation to the exhaust and transfers at BDC all corrected. Just a well put together engine.

Port timings are 192 exhaust, 130 main transfers, 118 auxiliary transfer, 152 intake, giving it 31 blow down. Main transfers shooting up 12 and auxiliary transfer shooting up 45.

not mine, but thats how i would like to see it. havent got any 'normal' gilardoni's anymore :))

18.5 hp (at wheel)

Tuned for drag racing, so good torque

Interesting. The ring land would pass right over the Aux exhaust ports.

No.... I was taking about the ring gap. On a standard Gila piston the ring gap would pass right through those AUX ports.

Unless ring pin has been relocated or using the Vertex piston. I believe that is at the top like a polini....but I can’t memeber.....my BrAiN tired.

I dont know, i’ve asked, but it’s some tuner secret

Seems to me that those are not stud holes at all .

Looks every bit like they are meant to accept head bolts and the base holes seem to be fitted with something similar to time-serts .

That would be interesting .

I can imagine what would have to happen , but , just how they did it ???

This is just my opinion so take it with a grain of salt but I think adding auxiliary ports narrow the power band while increasing torque throughout that power band being best suited for sprint bikes rather than top speed bikes.

There are only a few examples of adding boost ports in the literature, but here is one:

"Graham Bell - Two Stroke Performance tuning"

The cylinder (Bultaco Matador 250cc) in factory condition is of course not exactly the same as Italkit's Gilardoni, but the results show that adding two boost ports has brought more power to the entire rev range by about 5...10%.

These boost ports are similar to the one boost port in the Gila, i.e. oriented quite vertically.

I think it's interesting that in the same test, the 360-degree Inlet has been changed to 200 degrees, with which the power has been increased even more. Now, however, the power increase is aimed at the upper end of the rev range and the power decreases slightly at lower revs.

So do you have a 152deg Inlet on the Gila and do your piston have those factory made two holes right below the piston rings? Thank you.