HELP!!!!!!!!!!!

[anthony.beaver1]

I have been working on a 07 50cc buddy. I have replaced the ignition coil, fuel pump and cdi box. I have also cleaned the carb by removing it at completely tore it down and rebuilt it.The battery, gas and oil are all new also. It will start and run for a few minutes and even revs up at first but then it just dies. what am I doing wrong? I'm to the point of just giving up!!!!!
HELP!!!!!!!!!!!!! Thanks, Taz

[sc00ter]

The Buddy 50 has a fuel pump? Sounds like a clogged jet in the carb. You'll need a ultrasonic cleaner and break down the carb to get a deep clean.

How long has it sat? Super low miles?

[anthony.beaver1]

It's a gravity fed pump but yes. but it sat for 5-6 years which is why I completely tore it down and cleaned it twice now and I did use carb cleaner. like I said it will run for a few minutes and even rev up a few times, and then it just dies. I have the throttle adjusted correctly, this is why I'm stumped when I try to rev it after a few minutes it bogs down till it dies.

[sc00ter]

You need to do the ultrasonic cleaner. Carb cleaner alone is not going to do it. Disassemble the carb as much as possible (Pull the jets!) and soak everything in distilled water and a few drops of Dawn dish soap. Crank the heat as well! I kept my broken down carb body and all the parts in the ultrasonic for a whole day. Every time it was done I'd roll the parts around and restart it. I did a Thread about a pink Buddy that followed me home. It sat as well and had the same issues you describe.

[anthony.beaver1]

thank you for your help. I did what you suggested and it did help a good bit but it won't go faster than 20mph.
It still isn't giving it full capacity as for power, Any other suggestions.

[sc00ter]

I would check:
Tire pressure.
Is the front brake letting the wheel spin free or is it binding?
Is the scooter all beat up or in good shape?
Abuse (beat-up) means someone did bad things to it.
Is it derestricted? I had a restricted Buddy 50 (Pink Buddy thread) and it was dog slow!
Was it sitting outside in the elements or inside?
How many miles? Could it be time for a new belt/transmission overhaul?
How did it run before the new parts?
What promted the new parts to be installed?
Could the CDI be restricted you installed?
I'm assuming you purchased it as a non, or poor, running scooter with no back history. Or have you owned it the whole time and something failed? If the carb was gunky from sitting then repeat the ultrasonic process again. You might still have something clogged.

[anthony.beaver1]

Hello again, so it actually isn't mine. I was approached at the local corner store by the owner. He bought it from the original owner after he laid it down and I assume was to scared to ride it afterwards. But I was told it sat in his garage for 6-7 years before the new owner bought it for $150. Anyway, it was a process of elimination thus far. I started with the ignition coil because the electric start wasn't working from there I cleaned the carb and changed fuel pump/filter. After that I tested the cdi box to find it wasn't working correctly. so I changed it. The I reached out on here and you were kind enough to respond, which leaves us where we are now. As for the cdi box being restricted, I don't believe it is. I got it brand new off of Amazon and it didn't state anything about restriction in the description, but I guess it doesn't mean anything huh....Although, I believe
I purchased a cdi box geared towards racing scooters. As for miles it has 10,541 miles on it. but I will try the auto-clave once more and see what happens then. Thanks again for all your insight, Anthony
P.S. I'll let you know how it goes.

[sc00ter]

So you have verified it is no longer restricted? It's a washer in between the varirator moving and fixed face and a reducing washer in the exhaust, where it connects to the cylinder. My pink Buddy was restricted when I got it. The first owner was kinda slow and was really worried I'd steal his sock monkey collection under the seat when I test rode it for the next owner. The next owner never derestricted it because he thought his wife was safer going super slow instead of keeping up with neighborhood traffic and then I bought it off his wife. Restriced = SLOW! I'd double check it.

[anthony.beaver1]

lol!!!!! Sock monkey collection.... I needed that. But ok I haven't checked that. So 20 mph is basically it]s top speed then. This is the first Buddy I have worked on, I'm use to Kymco scooters up till now. Anyway, I appreciate your help on this.If I need anything else I will reach back out. You were a great help, Thank you, Anthony

[sc00ter]

They (restricted Buddy 50's) are dog slow! Once free of those pesky washers they should easily hit 40+ mph.

[anthony.beaver1]

Hello again, so I'm going to replace the drive belt and am thinking of replacing the clutch while I'm in there but I can't seem to find the correct clutch assembly kit for the 50cc buddy. All I have been able to find is the kit for GY6 scooters. Now I know with the fuel pump I had to order was for a GY1 but am unable to find one with those specs. Any suggestions as to which one I should order.

[sc00ter]

Scooter Works used to, or still does, sell the Blue Line brand of replacement parts. Great value and quality. Now, onto the clutch.

I would dis-assemble the clutch and inspect the guide pins and guide tracks. Sometimes the tracks will get ovaled/notched and cause the pins to hang-up. My Zuma pre-bug suffered from that but I could blip the throttle and get it into the full range, so I just lived with it.

I would also inspect the bearing. If anything was suspect then I'd replace the whole clutch assembly with a Blue Line from Scooter Works.

Use the correct grease in the clutch if rebuilding because if the grease is to thin it'll leak out. Oh, and replace the seals as well.

At 10,000 miles your'e at belt replacement time.

Also refresh in the variator:
Rollers.
V-slides.

So I assume you verified it was no longer restricted by variator and exhaust washers. One last thing though, make sure nothing on the exhaust is pinched. If anything on the exhaust is pinched it will slow the scoot down. I hate any scooter that's been down because it can sometimes complicate a simple troubleshoot session.

[sc00ter]

If you discover that the scooter has the wrong belt then find the original owner and choke him with the wrong belt! I was helping someone try to diagnose a power delivery problem once and they (owner) waited all day to tell me they recently installed a new belt. Hummmmm..... So I pulled it and it wasn't even close to the correct belt! The owner was basically given "A belt." from the local scrap metal guy who happened to be breaking down a junk scooter. Like this is how I imagined the conversation. Owner: "Hey, can I have that belt?" Junk man: "Give me $5." Owner: "How about $2." Junk man: "Deal!". I also had a friend who bought the cheapest belt he could find on ebay. The seller has it listed as "confirmed" fit. The belt tore everything up in the transmission! When he tried to get his whopping $14 back the seller said it was now used and refused his refund. This dumb friend has to spend around $100 to fix this cheap-o mistake! The kicker? He also bought "Confirmed fit" replacement parts and some of them was from the same vendor on ebay who sold him the wrong belt!

[anthony.beaver1]

WOW!!!!! JUST WOW!!!! It sounds like some of the people I deal with here in Bangor, Me. They are complete and total idiots here. My wife and I moved here from Ga in 2017 because they have better Neuro-surgeons here, but we didn't know this place was a science experiment gone wrong. Anyway, thanks for suggesting Scooter works, I'm very cautious when it comes to ordering things online. You just saved me hours of research. And thanks for all the other suggestions as well. I'm at my end with this thing. What should have only taken a few hours has now turned into weeks and I'm tired of dealing with it but I'm not a quitter, so I have to finish what I started. The up side is I have made $75 in cash and possibly a late 90's Toyota Corolla that he says ran when it was parked , they got a new suv so no longer needed it. So we'll see. Anyway, Thanks again, have a great day.

[sc00ter]

My problem is people expect you to spend your time fixing their problem for next to nothing. I get the following B.S. from people.
The local shop wants $200 to fix the problem, so I say I'll charge $500 to make them go away,
Why do you want to replace that? It still works!
You fixed my electrical issue but you caused my transmission to break!
Go to YouTube. I don't have a computer.
They want to sit on their butt while you bust your knuckles or worst, expect to drop it off and come back when done.
Never even offer to pick up lunch or if they do never follow thru.
Expect YOU to pay for the parts at the dealership! They'll "Pay you back..." Get outta here!
I don't want their bike taking up space in my garage while waiting for parts.
I give someone a list of needed servicing parts and they only buy a few of whats needed.
Expect not only a full one year warranty but pick-up and delivery should something go wrong. Go to the local shop.
There's a guy in my 'hood who wants me to check his valves on his 150cc scooter. Said he doesn't trust the local shop. Why trust a complete stranger? Makes no sense. I told him to go to the other local shop instead.
I would rather ride my ebike to the local barcade and play some pinball than to work on a beat-up scooter for nothing.
I work at a small engine factory for a living so I sure don't want to do it on the weekend.
People like to use you if you let them so you have to put your foot down.
I'll bend over backwards for my friends and they'll return the favor when/if needed.

[tenders]

Back to your original post, you said you replaced the CDI.

I tried this on my 50 with a few cheap Amazon CDIs that came in cool colors. Some had blinking lights. Some said “racing” on them. All were better-looking than the nondescript stock unit that comes in the Buddy but none of them worked anywhere near properly, Some wouldn’t allow the engine to start at all, and I went back to the OEM CDI.

I don’t think the aftermarket CDIs that may work with the cheap Chinese scooters necessarily work with the Buddy. That may be the source of your issue here.

[sc00ter]

Tenders made a valid point on the aftermarket CDI. Doesn't the CDI box ground on the mounting point when bolted down? I recall putting a aftermarket CDI on a Ruckus build and for the life of us we couldn't get it to fire correctly. Turns out we pulled the CDI, cleaned, sanded the paint on the mounting point, smeared a bit of dielectric grease and remounted the CDI box. BOOM, we had power! The CDI box just wasn't getting a good ground when bolted down. I've also heard rumors of some aftermarket CDI's not liking the Buddy and Rough House 50cc but I've never verified said rumor.

[anthony.beaver1]

Hello again, quick question? Will a GY6 electric choke fit on the 07 50cc buddy. I got the belt changed then it wasn't acting right when I turned the throttle, so I took the carb back off and cleaned it again because there was a gunky build up in the bottom bowl of it. I also cleaned the jets again while I had it apart. Then I put it back together and put it back on. But now it while start and run for a minute then dies. If I turn the throttle it dies..... I am about to set this thing on fire and roll it down a hill. So what do you think. Oh and btw when I pulled the old belt off it had stretched almost an inch from it's original length.

[anthony.beaver1]

Oh yeah! To Tenders post I ordered the one that said it was for the 50cc buddy, just like the other parts. Now the fuel pump or what ever they call it I had to order a GY1 scooter one so it what screw on to the tank, the one for the GY6 was to big where the nut threaded on the tank. But the cdi has a rubber mount that just slides on to a point on the frame. I have noticed that when it is idling the lights do kinda flash until you turn the throttle. which I thought was strange but the owner said its ok, so it is what it is. If I were to get another cdi box where might I get one because scooterworks doesn't have it

[tenders]

Couple thoughts here:

- the belt didn’t stretch an inch. That was the wrong belt - very much the wrong belt. What other wrong parts have been installed? Rhetorical question; trust nothing at this point.

- if the engine starts and runs for a while, then shuts down, it’s telling you that it’s too lean. It runs initially because the autochoke is enrichening the mix. Some carb orifice somewhere is still gunked up - or - are you sure you have an OEM carb installed? I am not aware of any functioning substitute for the OEM carb in these engines. The GY6 carbs on Amazon do not work even though they say they’re Buddy-compatible.

- you mentioned a rubber grommet for the CDI. Where did that grommet come from? As I recall it is important that the CDI (edit: REGULATOR) and one or two other wires leading to the CDI (should be REGULATOR) attachment point be connected metal-to-metal to the CDI (REGULATOR) and to the mounting point on the frame. No grommet. (I had a vexing problem that took weeks and several fruitless parts swaps to determine that it was simply a wire that was poorly grounded to the REGULATOR screw.)

- if you’ve taken the carb apart again after cleaning and found gunk in it, stop what you’re doing and clean out the fuel tank and associated hoses and filters. You have to get the old fuel and residue out of the upstream system before dealing with it downstream. Running skanky gas though a clean carb will result in a skanky carb no matter how many times you clean the carb.

[anthony.beaver1]

Hello, I thought it was the wrong belt until I looked at it and clearly printed on it was the correct part size. Now as far as know I am the first person to work on it since the original owner purchased and laid it down. So I assume the carb is stock. The rubber I was talking about was on the cdi box when I opened the front panel. It was stock as well. And it does not bolt/screw to the frame at all. The rubber brace simply slides over the cdi and then to a spot on the frame. Keep in mind it's a 2007 buddy 50ccso the are a little different from the newer ones. But I have cleaned the fuel system completely. Thanks for your insight.

[tenders]

Ah, my apologies, I confused the CDI with the REGULATOR grounding which was the root of my problem. I will adjust my post.

[az_slynch]

Have you checked for leaks around the crankcase seals?

I've seen similar behavior to what you're describing with a Honda Elite 50 before. I've also torn down an '07 Buddy 50 with a similar behavior pattern where a cruddy pilot jet and a leaking CVT-side crankcase seal were contributors.

Pull the variator and look for oil residue around the seal. Then pull the flywheel and stator to check around that seal. You shouldn't have aly oil residue behind the stator, so it's easier to tell if it's leaking.

There's also an O-Ring that fits around the oil pump housing. The pump passes through the crankcase behind the stator-side oil seal, so it can be a cause for an air leak as well.

To save some headaches, you could consider pressure testing the engine or using a home brew smoke tester to find crankcase leaks.

Here's a resource to help understanding how to check for air leaks:

https://archive.scooterlab.uk/engine-pr ... heap-tech/