Hello! I have a 1980 Sachs Prima moped. I have an issue where it likes to stall occasionally whenever I come to a stop (Intersections, stop signs, etc.) and then I have to get it started back up. Im thinking it has to do with the clutch/decomp, because when it stalls, it will behave as if the clutch lever is pulled in (tires very stiff to turn instead of freely turning) and if it stalls like this, I could literally just roll it down the road and start it back up without the lever pulled in. So, I just want to know what I can do to fix this issue. I'm relatively new to mopeds and want to and am willing to learn about them. So if anyone has any ideas, that would be great! I will have pictures to focus on the issue. Thanks!

Piazza hawk 4 gt
Drop a gear and disappear 👨🏿‍🦼‍➡️💨

I have build an 88cc derbi, but my kickstart is bugging me, i’ve tried to fix it about 10 times now, and it keeps breaking. The gear spring keeps falling out, so i bought a new oem one, but it still does it. So now i need to angel the bike to start it.. whats wrong? Euro 2 bike

I do handyman and construction kind of work and a client has this in his barn. Mentioned to him prior to know about this bike that I was looking for a project and he said he had this moped. He says it’s been there since they bought the house. He was going to give it to me for free but I kind of felt bad since he has a bunch of work done around the property so we settled on a deal, I’ll fix his barn door so it opens and closes like it should (it’s a security door and the top corner won’t clear for some reason so it doesn’t close) and I get to keep this bike.

On the back it looks like it has a license plate but it has 7 digits (I’m in CA so 7 is typical for today’s plates but i thought they had 5-6 back then for motorcycles). Also seems to have functional pedals making it a bicycle, or motorbike. It also has a “plate” below the seat saying it’s a bicycle license plate and has the numbers on it, and says it expires Dec. 1984.

If anyone happens to know about these bikes, I’d definitely like to know more about it, such as make/model or year and such. Also, do these usually have a title or something like that for California? It was here since the guy bought the house so I’m not sure how I’d go about getting the title. Would I just get a Bill of Sale from him like usual? Also for starting the bike, it’s just pedal and let go of a clutch or something and it starts right? Looks similar to a motorbike I had and that’s how it started

It’s amazing to me that it’s in such good condition being that’s it’s been abandoned since around 1984 I’m guessing. After sleeping for 42+ years, it’s time to wake it up and bring it back to life

My engine seized a couple weeks ago, i finally got around to tsking the cylinder off and splitting the crankcase and what happened was the big end bearing turned itself into glitter bending the wrist pin in the process

More cool stuff I shot doing the San Francisco Rally last weekend.

I recently acquired side covers for my 1978 piaggio bravo and the right side pedal crank strikes the side cover Is there an aftermarket crank or fix anybody would recommend?

Here’s some of the footage I got from this weekend. Sorry it’s so low-res. This was one of many amazing rides during the Rally.

My 2019 Aprilia SX 50 won't start, and I'm trying to figure out what's wrong with it.

Here's what I've checked so far:

-The carburetor is clean.

-There are no air leaks around the air filter or intake manifold.

-The spark plug has a working spark.

When I try to bump-start it, the engine runs very briefly and sputters before dying.

When I try to kick-start it, it doesn't even fire or show any signs of starting.

It has a Nakamura 49,9 cc cylinder and a Tecnigas sport exhaust.

Does anyone have any ideas about what could be causing this? What should I check next?

Any help would be appreciated!

Trying to diagnose this:

- Hard to start but runs fine and can idle

- No power once trying to ride it

- Exhaust gas exiting out of the red circled port underneath the motor while running.

- Spark plug shows it’s running a bit rich but not too bad.

- Bogs lower in rev range

Eventually I’ll source a compression tester, but for now I’m asking here. Is this a vent? With threads?? If so, I presume this is blowby? Flywheel cover is off since I was adjusting timing.

Such an awesome experience

I recenly bought this simson s51 for ~400€, repaired it with ~1500€. The engine is stock 50/2, the most i have ever done on it is 78kmh with 16t sprocket. I want to upgrade it in some way, perfomance wise as well as look wise. Thanks for any tips (please include a price, im on a budget)

I made engine mount from scraps and repainted homemade exhaust,sometime i stare at little screamer like a creep.kitted airsal65 and exhaust since 2015.kinda suprising how time flies.

I know this has probably been asked before but the only people i saw recommended was tomahawk and one in Fullerton. Tomahawk is no longer repairing.

Anyone got a tomos mechanic or know of a moped repair shop in Socal? Got some issues that are beyond my mechanical skill .

super stuffy crank, Gilardoni 74cc kit, cross country cdi,22mm Mlm intake, puch e50 bottom end stay tippy my friends. 🤘🏽🫡

Got a 420 chain for a moped, chain breaker i have bent the outer link, I know i can pop both sides to get the link broken, but i need the outer link to stay but with the pin out. Are there any chain breakers you guys recommend to pop the pin out without bending the outer plate? Or is there a technique I can use with this breaker? Thanks!

Looking for a running Scoot close-ish to the Chattanooga TN area.

Would prefer a 2-stroke so I can mod it up to speed.

Budget is around 800-ish.

Thanks in advance!

I was riding behind my buddy, and then flames and sparks shot out of the exhaust. Where did the skirt go?