MOPED ARMY

looks like fun

fabbed up plate steel wouldn't be a bad program either. if you're not scared to cut off those top fins... i dunno what it is that holds more people back from doing this.

i've tried a couple times to cast a reed adapter but it has ended in total shame and failure. as usual i'm doing it way harder than i need to.

Weird can't upload pics

I cant wait to see this crammed into the frame

Got it done today, but have to wait til tomorrow to test.

The weld filling in the decomp area was porous, so I'll redo it some time, tapped the decomp valve hole anyways so fuck you lil hole ass bitch.

Ported it to be a fast bike but controllable. Hopefully it'll be a good time to ride

Like your mom

That welded head is sucking.

The trapped oils in the aluminum makes it very challenging to weld. Especially deep in the chamber. So annoying. It makes welding on a flat surface or edge seem really easy.

The compression felt great by hand for 50cc, but when read it only read 90. I think the porosity in the chamber opened up the whole decomp tract to the combustion chamber making way too much volume when running, but turned by hand it still feels good. Idk.

The bike was running hot today during jetting. I think that head is the main thing screwing stuff up. I also gotta get a cdi on this, can't stand points.

Well, I kinda decided that it's better to use some treats credit for the treats 50cc derbi decompless head, mostly because I gotta stop fucking with mopeds cuz band stuff calls. My teddy bear band is getting ready to rock bro

Hooked it up and set timing and it's awfully impressive for a ported stock bore. I have to upgear and put a cdi on it, but I can see the potential. Painted an old fucked up airbox I had silver and pooped it right in. Haha I'll do a new bottle and make the holes more even cuz this one is kinda jacked.

Pics!

I learned with adding material to variators that alumaweld is the shit.

Doesn't warp the pulley at all, tig gets things a lil too hot unless you take a lot of breaks.

I have to fix a variator soon that I cut too deep and made windows in it. I'm going to tack weld tig aluminum plate over the holes, then cover the whole thing in alumaweld then turn back down.

I did one awhile back and it holds up really well, better than the aluminum castings for sure.

yeah boiiii that sounds sick

you think even with the big porting it still has plenty of torques to pull single speed or is this variators only jams?

oh yeah i forgot treats is right down the street now... i'm thinking 'man its crazy how fast he gets shit done, even his treats show up same day.... '

Took this out on a final test run and its mostly awesome, needs a slightly more rich needle position.

Climbed the steepest longest hill I have and got to 340 at the top. It's just really snappy on the throttle. I love that.

Didn't have to change the variator tuning, it didn't give a fuck.

This porting technique rules

Me too ^^^

Yeah, trimming the side skirts is good on some, gotta be careful with shorter stroke 50s like hobbits tho, they don't love losing the case stuffing. The derbi has 43mm stroke so it doesn't care as much.

My 50cc ported hobbit has not great idling and kinda slower throttle response because of a lil too much skirt grinding. I need to redo with another stock jug.

This is cool.

should have this wrapped up in a couple days here

if my figgerin' is right, it ought to be about the right thickness to act as a spacer on a ZA so i can run a polini intake with a bing on a stock cylinder

I've never seen a combustion chamber with decomp that performed really well. They are ok, but a real combustion chamber makes lots of difference. When I first switched from a hobbit head to one I made with no decomp and a really good squishband, the swap just woke it up

Cool riser Graham. Just gotta port the shit out of the cyl to get the gains. The porting I did just sounds so brappy. BRAAAAP (edited)