Questions tagged [carburetor]

A device on an internal combustion engine that meters the flow of fuel at a particular dynamic rate into an internal combustion engine

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6
votes
1answer
230 views

What causes an engine idle to increase briefly?

I have an 82 Honda 450 Nighthawk motorcycle that I'm rebuilding and I need to tune/balance the carbs. I have them bench-balanced and reset the idle screw on both. Now it runs a lot better, but every ...
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0answers
12 views

49cc stand-up scooter won't start fuel is flowing back in the tank instead of the carburetor

49cc stand up scooter wont start. When i prime it i can see the gas going backwards instead of to the carburetor. I have a new gas tank the carburetor is fairly new I take the spark plug out and it's ...
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0answers
25 views

Rough idle in Ford Capri mk2 1977 V6 with Solex carburetor

I know internet is filled with questions like this but I'm out of options so I turned into stackexchange as a great source of knowledge. So my old green capri has the rough idle. Car data: Ford ...
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2answers
30 views

Second butterfly valve in riding lawnmower?

So I am helping out my neighbor with her lawnmower, tuning it up and what not for the summer. I noticed that when running the lawnmower, as soon as you take it off of choke, it revs up as fast as it ...
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2answers
172 views

Problem with float height on a Honda CB400T

I might have a problem with the float height on my CB400T from '78. It seems to be running rough at a constant speed, however when i accelerate it'll go away until constant speed again. It's like ...
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0answers
46 views

What is the plastic plug for on the bottom of an SU HS4 Carburettor Piston?

Please could somebody explain the purpose of this plastic plug on the bottom of my SU HS4 carburettor piston? The lip of the plug protrudes very slightly from the bottom of the piston (shown bottom ...
2
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1answer
689 views

Idle RPM is not setting properly sometimes

I have an Apache RTR 180 (Carbureted) Sometimes, when I downshift, and when shifting down to 1st gear (to stand still), the RPM shows somewhere around 2000. The normal idle is around 1200 - 1400 RPM. ...
0
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1answer
39 views

2004 Honda CB599 cylinders 1 and 2 don't run

Hello I appreciate any input you might have. This all started yesterday, I have a 2004 Honda CB599 carbureted. I was using a little tire pump to put air in the tires and the bike suddenly died. I ...
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0answers
28 views

Scooter stalling when idle and warm

I have a 50cc scooter gy6 and it dies when stopping at traffic lights or when idle in general. it has a brand new carburator. Things I have noticed: When it is cold it does not do it that often but ...
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4answers
82 views

Beginner bike - carburetor vs fuel injection

I'm looking to purchase a beginner motorcycle/bike. I would like something that has less maintenance / potential for issues. Which one is less likely to be an issue in a bike - carburetor or fuel ...
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1answer
157 views

What carburetor bench tests are common?

So, August of 2016 I suddenly had gas flooding down the side of the engine on my Katana 600. I pulled and rebuilt the carbs (they were super clean, but the seals and O-rings were all shot, plus a ...
4
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4answers
6k views

Carburetor question, attempting snowblower repair

I have a Craftsman Snowblower, model 247.889702. Unit is a few years old, and I can't get it to start. Unfortunately, I left gas in it one winter and over the summer and of course when I tried to get ...
6
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3answers
47k views

Motorcycle bogs down under load

I recently did a head gasket repair on my 1986 Kawasaki GPZ1000RX and now that everything is back together it starts up fine, idles fine, and revs high without a problem while in neutral, but when I ...
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2answers
2k views

Coleman ct200u ex minibike starts, then stalls

Have problem with my Coleman ct200u ex that is driving me batty. It starts, runs for about 15 seconds, then dies, almost as if it ran out of gas suddenly or the kill switch was pressed. Will not ...
4
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5answers
28k views

While raising the accelerator suddenly my bike's speed goes down

While driving, I faced some problem in my bike. when I raise the accelerator suddenly my bike's speed goes down. Anyone knows what is the problem?. I'm using yamaha ss 125 cc bike.
7
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2answers
238 views

How much oversize should you target when choosing a throttlebody?

This is in addition to my previous question about throttle bodies. I know it may sound a bit subjective, but I think it has a clear technical aspect, and I have done a considerable amount of homework. ...
7
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3answers
405 views

Quadrajet issues

1970 Chevrolet C20 Custom Camper Pickup SBC 350, Quadrajet carburetor I've been having some issues I believe are float related. Wanted to see if my thinking is correct. Issue #1 - takes a bit of ...
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0answers
2k views

Coleman ct100u engine, no start

Verified igniton system is good, cleaned and gapped plug. The engine is is essentially pushing out gas from the carb side and not wanting to start, I don’t know what else to add I’m not really ...
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0answers
39 views

My motorcycle bogs

I have a 2007 Honda shadow spirit 750. My motorcycle Boggs when I open the throttle, it idles fine. When I bought the bike the guy said the petcock was bad and that there are bigger jets installed in ...
-2
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1answer
46 views

Which model to buy in between TVS Apache RTR 160 4v Carb or FI? [closed]

I am from Lucknow, India. I am planning to buy TVS Apache RTR 160 4v but I am really confused about whether to buy a carburetor version or fuel-injected version of the same. The ex-showroom price of ...
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0answers
17 views

Why with the addition of a gy6 50to100ccbbk,44 stroker,20mm cvk carb with 33 pilot and 105 main jets does my gy6 engine still nog down?

Gy6 50 to 100cc Tao Tao atm-a1 50 scooter. I've tried: Going up and down on jet sizes Cleaning carb Replaced carb New pod filter Advance timing 2 degrees New cdl Checked fuel flow from carb Changed ...
3
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1answer
333 views

150cc chinease dirt bike powerloss bad backfire and no idle

I have a 150cc Chinese dirt bike. About a month ago it started to bog a lot. It could only start on choke, so I took apart the carburetor, cleaned it and put it back together. The problem still there. ...
0
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1answer
23 views

Primer bulb not drawing fuel

I had an old 21cc two stroke weedwacker engine that I had lying around and was trying to rebuild it for use in a possible hobby project. It sat with gas for a very long time so I disassembled the ...
6
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2answers
18k views

What causes too much fuel for my Briggs and Stratton engine?

I recently bought a generator that uses a Briggs and Stratton 17hp Vanguard engine. Before purchasing the generator, it had not ran in several years. The fuel was stale and the oil needed to be ...
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0answers
25 views

What is the exact name of this RC nitro engine specific carburator part?

I've a Traxxas Pro .15 engine with me. The rubber boot attached to "Throttle lever" on my carburetor is cracked (picture given below). The engine has been in storage for the last one year. Yesterday ...
0
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1answer
37 views

motorcycle sputters and temporarily dies

Recently, my motorcycle (2008 Ducati Hypermotard 1100) has been temporarily dying while riding it, usually on the lower RPMs of the lower gears. I thought it was the heat, but today in the rain it ...
0
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2answers
10k views

Petcock vacuum hose was detached now bike won't start

On a ninja ex250 I recently purchased I noticed the vacuum hose which attaches to the pet cock to actuate the flow of gasoline to the carburetor was detached at the connection to the petcock. When ...
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1answer
48 views

Fuel was chocking while entering into the carburetor

I'm having an old model TVS Scooty ES, as the petrol was chocking while entering into the carburetor. After cleaning the carburetor and replacing a new spark plug and I had neither rotated the Air/...
5
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1answer
59 views

Unidentified component on carburetor

A couple of days ago I went over to a friend who owns an older KTM motorcycle and as I was having a look on his motor I noticed a component on his carburetor which looked like something electronic but ...
2
votes
1answer
261 views

Why 3 x 2 barrel carbs on a v8 does not 4 x 2 make more sense with one two barrel per two cylinders

You hear of a "Six Pack" and "Tri-Duce" (carb setup with three two barrel carburetors) ... Wouldn't 4x2 barrels or 2 four barrels be better?
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0answers
23 views

Sym jet sport 50cc 2 stroke cutting out

Starts up fine from cold, can ride it for around 5mins then cuts out and won’t start until cold, it’s got a good spark, competition and is getting fuel. I’ve change the spark plug, ht lead and ...
6
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1answer
11k views

What model carburetor is this? (Mikuni Corp)

Recently, my ATV (a 1997 Yamaha Big Bear 350 2x4) developed a carburetor issue where it would run rich. I took it to a mechanic who says that it needs a new carburetor. However, he was unable to find ...
1
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1answer
65 views

What screw is missing from this carb (photos included)

I'm repairing a carb and the part (screw?) which goes in here broke, and I'm struggling to find a replacement as I'm not sure what to search for! What's it called? As shown in the picture it's a ...
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0answers
266 views

carburetor Leaking gas oil mix when fuel lines replaced

Disclaimer I know this is for a blower not an engine, but was not sure where exactly to pose the ? I'm trying to assemble the fuel lines for the Ryobi BP42 two cycle blower, someone else took it ...
0
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1answer
18 views

New carburator gas coming out of small tube inside

I installed a new carburator on a 6.5 hp Tecumseh motor for a wood chipper. After hooking the fuel line back, gas flows steadily out of the small tube inside the carb. I am not very mechanically ...
0
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1answer
35 views

1998 Suzuki Intruder 1500VL Back Fires After Replacing Alternator

The bike has ran fine for around 100 miles just days before I replaced the alternator / magneto because it wouldn't keep the battery charged and would barely maintain while running high RPM's. ...
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4answers
1k views

Leaving Bike unused for 3 months

I am going out of country for 3 months is it okay if i leave the bike unused for 3 months ? and what to do to protect my bike for any loss ?
2
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3answers
82 views

Will a carbureted engine have different fuel consumption rates based on external load, with the same RPM?

I have a small Briggs and Stratton Model 19 engine, net power of 10.0 HP. If I ran the engine at full throttle without any external load connected to the output shaft, would it consume the same amount ...
1
vote
1answer
101 views

Poor Uphill acceleration [duplicate]

I have a Honda CBF 125 2010. It had a new chain and sprocket set fitted about 3-4 months ago and I have tightened the chain again since then (about a week ago). I have poor acceleration when I come to ...
1
vote
1answer
36 views

2001 katana 600f

I bought this bike not running. Did simple stuff like plugs, fresh fuel, air filter, and so on. My problem ous the bike starts great and runs strong for about 5 to 10 min or approximately a mile or 2 ...
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0answers
135 views

Where to hook up my carburetor hoses on a 1998 Yamaha Breeze

1998 Yamaha breeze Four wheeler. Where do the carburetor hoses hook up
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0answers
55 views

Why might I lose power when I open the gas too quickly?

My 1990 Honda Super Cub has a problem that seems to occur mostly after it gets wet. Sitting in neutral, if I slowly open the gas it will reach full revs easily, but if I twist straight to full ...
3
votes
1answer
1k views

What does the Carburetor Secondary Venturi Do?

We know that on the left side is the primary Venturi where air and fuel mix together. On the right side is the secondary Venturi. What is the role of the secondary Venturi?
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0answers
30 views

1972 international Harvester Scout II 345 engine - LOUD bang & PLUMES white smoke from engine

Just put water in radiator, heard and felt VERY LOUD BANG from engine and massive amounts of white smoke blew from engine when trying to start. Engine didn't turnover & turned off key ASAP. ...
3
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1answer
2k views

VIP future champion gas moped (carb)

I have a moped talking, and on the carburetor there are usually two hoses, right? Because currently mine only has one coming from the carburetor, and the line is going to the gas tank. However, I do ...
6
votes
1answer
34k views

Testing automatic choke on a scooter

My Peugeot Speedfight 2 is having trouble starting when cold. I took down the carburetor and cleaned it. The spark plug is also pretty new. I've read that automatic choke can be faulty but I don't ...
2
votes
1answer
693 views

Gas leaking from this tube,wondering what exactly this tube is

Hello, I'm fairly new to mechanics of motorcycle(riding for 2 years but never tried to repair it myself till last month). As I noticed I am using way more gas than usual and there was gas odor, then ...
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0answers
22 views

1987 skidoo elan carb issues

I am trying to figure out either what model carb I have (to purchase a rebuild kit) or spec settings on the fuel/air jets. Tried to start her up tonight, ran for a minute then got flooded. Anything ...
0
votes
1answer
873 views

Vehicle suddenly shuts off while riding

I've been an owner of pulsar NS200 2017 model for about 1.5 years now , recently when I was commuting in my city at around 30kmph , the bike began to lose power and shut off . I pulled over and after ...
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0answers
47 views

Motorcycle won't start at all

I have a 2006 Honda TMX 155 which has 155 cc 4-stroke OHV honda engine. It was garaged for about two years and I decided to make it my first project to get it up in running. I'm new to motorcycles, ...