MOPED ARMY

Yeah without making a forming tool for this one time job i have no way to manually match the piston curve but i measured the piston with a t-bevel and it lined up pretty damn close for the 5mm of area its squishing.

Hopefully this will be much better than just slapping the head on with no modification. I still have about 1mm of material i can take off the deck of the cylinder while keeping the C/R under 10:1, but i will revisit that after the engine is broken in if need be.

Currently waiting on my replacement ring to show up so i can gap those and finally get the head studs torqued. Then itll be time to set up the CDI and hope she rips.

The engine was described as looking like an angry blender today so thats what my moped is now powered by.

Got it all timed up at 1.2mm btdc and now it starts with 2 or 3 kicks from cold.

With the 68 jet the dellorto comes with, i topped out at 35 flat ground, jumped up to a 74 and lost another 3 mph. So im expecting to land around 72 or 70 when i have some time to play with jetting. The goal is 40 with ease, and i currently have 7g weights in the variator which is roughly equal to a 4 ball guide with 2 balls in it.

I also think a pipe will help it rev, though i want to get it jetted right before ordering a doppler. I also want to shave some material off the deck because the C/R is a little low, but that was on purpose because i didn't know how dramatic everyone was being when reporting overheating their heads.

Currently fighting the lighting setup, and getting the 12vAC rectified to DC. waiting on a generic 4 wire R/R from what looks like a gy6 that i will play around with.

Dropped it down to a 72 and got it back to 33, and i think it may have just a few more rpm to go for it to variate fully so i can try the 8 gram weights in it. I do still want to shave the deck because the C/R is still down around 8.5, would like to see it around 9-9.5.

Will try the weights combined with a 70 jet and see if it keeps trending upward, but 68 seems like a small jet for this setup in 40 degree weather does it not? I got it registered today so i can be a little less careful with my test rides.

The way i understand it is the expansion chamber has a big effect on max rpm so it makes sense if the stock one falls off at a certain range, I did de-restrict the blunderbuss.

I also have an inductive tach on the way to see if i can get any info from that.

It’s a $100 kit just run the bitch! It’s like pointless on so many levels to spends hours and more money. It’s junk new treat like it! I buy new kits with the rings to fat all the time.

If you sold bbs would u rather:

count a 1000 bb individually or find the weight of the ≈1000 add a few grams?

Time is money

You're a garbage person rocco, it takes so much self control not to delete your dumbass 'advice'

I blast losers like you at every rally and have never once loaded up in a breakdown van. What's the point in just sucking at things over and over again and never learning or growing as a person?

Tuning is the art of mopeds, blasting a country road with the engine singing in harmony and every bearing, spring and little part moving in a perfect chorus is like staring at a Degas masterpiece and seeing every perfect detail. The way it makes your brain feel and the satisfaction of knowing you turned a bunch of cut rate garbage parts into a masterpiece is worth every minute. Some hater was probably giving davinci shit for the 4th time he painted over the mona lisa but that loser is lost to time and millions of people have felt the power and joy from a tiny little painting of a kinda ugly chick done to obsessive perfection.

It's awesome to see someone new to the hobby who gets it, that's why my advice is to really bear down and get it perfect. Adding a pipe makes the tuning a lot harder, it throws everything off and makes it harder to feel where that sweet spot is. This setup is so good with the stock pipe when it's really dialed, it's one of my 'go to' builds for a reason.

Well....you get it. To me that is what it is all about.

The screens and stuff really are a pain. A air box is really the way to go. However I always have a hard time finding a location I like, just because they are big. Jbot has a good write up on his Shampoo Bottle air box.

JBot air box

If your use to tuning motorcycles, the single circuit carb is a drag. I have had good success modifying the SHA Slide from Graham’s blog and in the WIKKI. On a stock setup it is not usually necessary, but it does allow you to get a better tune overall. The problem I always had is with larger pipes and SHAs is that you could tune it for low or high but never get it right for both. Modifying the slide allows you to have both.

If your picky about tuning I always recommend the PHBG over the Minkuni. For smaller displacement I always like the PHBG17. It is harder to find and I usually have to go to eBay. It usually has the AN atomizer and you have to change it to the AU. But to me it is worth it. My biggest issue with the minkuni is their needles are not in any specific oder. Trying to find a slightly different taper is a nightmare because unlike PHBGs. The needle charts are all over the place.

Yea but for right now it’s chill

got some more tuning time in, put on an air filter that wasnt just some expanded steel like the dellorto ones were, and installed the cnc zone intake from treats.

popped the 68 jet in and it will now do 40 on the flats, which is just fine with me. If i go any faster i think i need to do some bracing on the swingarm, and slap an ebr fork with a cross bar to feel less sketched out.

I might add a circuit pipe to fatten up the middle of the power, but im not 100% sure on that. for now it does exactly what i wanted to.

Need to figure out why the brakes still suck, and maybe add some blinkers because hand signals are sketchy when you need fistfuls of brake to make that stop sign.

if i wanna get really picky ill blend the intake on the cylinder to match the intake runner.

bah, thats no fun

So i tried downjetting again to 66, and i think thats just the right amount of rich. flat ground will cruise 41 with no headwind.

Ordered a simonini circuit pipe because i like spending money i guess.

in a few weeks ill probably add a crossbar because im a big boi and dont really get the warm fuzzys with a 40 year old stamped frame.

new paint eventually

profit???

Its been a while since ive touched this thing, but took her out for a rip and still holding 40 top speed with the aluminum pulley, though the variator hits it at full variation, so i will have to play around with spacing to give it just a tiny bit more clearance.