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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10
votes
1answer
523 views

Does the air screw only affect the pilot jet?

I have a 2 stroke motorcycle, it's Kawasaki KR150. When I try to do some jetting on its carburetor (it's Keihin PWL26), I saw that there's an air screw. So now I've been wondering about this air ...
4
votes
1answer
39 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 ...
15
votes
4answers
68k views

Symptoms of Lean or Rich carb settings on a motorcycle

I have a 1981 Yamaha XS650. I recently put in K&N stock replacement filter (ie, they are in the airbox and conform to the size of the original), however they may be leading to a leaner mixture ...
3
votes
1answer
43 views

Hero Passion Pro - Choke Issues

I have a Hero Passion Pro Motorcycle. It does not get started when the choke is on. It does start when the choke is turned off? The engine produces a disturbing noise and smoke goes out when the ...
4
votes
2answers
43 views

Dirt bike carburetor problems

I just bought a new float needle that fits and it still seem like the tang is not even touching the needle when I press the floater all way in.I have a PJ carb,maybe the floaters are to a pwk carb,...
1
vote
0answers
42 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. ...
3
votes
0answers
32 views

1st and 2nd cylinder not combusting in dual carburetor'red setup

So I have a Maruti Esteem engine with a dual carburetor on an engine dyno and everything was already installed when I joined this lab. We seem to have a problem when trying to fire the engine. 1st and ...
3
votes
2answers
102 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 ...
4
votes
1answer
26 views

What make and model carburetor does a Farmall H tractor have?

I've been asked to find parts for a Farmall H Tractor carb. None of the searches I try identify the Make and Model. I believe the engine is an IH C152. I can see that the same carb is used on an H, ...
3
votes
3answers
112 views

Percent of Air and Fuel used for Combustion

I've had this question for a long time. I know the percent will differ based upon the throttle position and will be either by stoichiometric ratio or rich mixture. The stoichiometric ratio (AFR) ...
3
votes
1answer
27 views

What fuel lines are recommended for a propane carburetor?

I've looked at a propane carburetor for a chevy small block engine to be used on a rock crawler so the engine wouldn't stall during inclines but I haven't seen any recommendation on what should be ...
4
votes
0answers
20 views

Do any internal modifications need to be completed if switching over to a non-standard fuel delivery carb?

I'd like to convert over my 350 small block to a propane carb setup but I am unsure if there needs to be any modification to the motor itself. When converting over to a propane solution do you need ...
6
votes
1answer
111 views

No power at higher RPM

I just had to do some fixes on my 1993 Kawasaki ZR750. I had some rust in the tank so I got it cleaned and sealed. To be thorough I also checked the rest of the system. Here's what I did: ...
10
votes
2answers
325 views

Can't start a Kawasaki GPX 750

I'm in the process of getting my 1986 Kawasaki GPX 750 back in running condition. The bike was sitting in the garage for two years. In this period it wasn't started even once. Two years ago the engine ...
9
votes
1answer
117 views

What is the yellow precipitate in my outboard's carburetor?

I've got a 2008 Tohatsu 9.8 HP four stroke outboard. My low speed jet keeps getting fouled and on several occasions, I've found yellow almost crystalline "growths" for lack of a better word inside ...
5
votes
2answers
120 views

Basic operation of a choke valve

As user Steve Matthews pointed out on my last question Car interior rattles on idle The ideal use of a coke is "Use the choke until the car warms up properly. You can reduce the amount of choke ...
4
votes
2answers
37 views

Jetta mk2 petrol, reasons for loss of power other than fueling & ignition

I'm planning on buying a 1989 VW Jetta A2 with a 1.6 carb engine and automatic transmission. The particular car I'm interested in is generally in very good condition, except for being low on power and ...
20
votes
3answers
1k views

Does a carburettor engine apply fuel at high speeds when the pedal is no longer depressed?

There's a question that is pretty similar to this one except the existing question satisfies EFI engines. EFI question Let's say I roll down a hill at a considerable speed I let go of the gas. Say ...
8
votes
1answer
380 views

Carburettor jetting on installation of aftermarket air filter

I have a 150cc motorcycle and am planning to install an after market air filter(K&N) since the stock one was favoring fuel efficiency and not performance. The bike has a carburetor (Mikuni) not ...
12
votes
2answers
177 views

Motorcycle Four Body Carburetor Synchronization Balancing

I would like to adjust four-body carbs by myself, in order to avoid spent money every time. What are the basic rules, tools and secrets of synchronizing multiple carburetor bodies?
6
votes
1answer
121 views

Yamaha Seca - Motorcycle Idle problems

My motorcycle (1982 Yamaha Seca 650) has had a strange problem with the idle for a few years now. I have not been able to diagnose it and I'm hoping that someone here might be able to help. It starts ...
8
votes
2answers
57 views

2002 Suzuki RM250 - Dies after warm up, restarts after cleaning wet plug

Has a fresh top end. Carburetor cleaned. Fresh fuel mix. Reed valve looks ok. Air filter and intake, ok. Has good spark. After it dies, the plug is wet. Restarts after cleaning plug? I ...
10
votes
1answer
83 views

Is it possible to fit mashroomhead air filter in Honda Stunner CBF 125?

I have Honda Stunner CBF 125 2009 model. I just need to know is it possible to replace the typical air filter with mashroomhead air filter to improve the bike performance? Is there any other way ...
5
votes
2answers
1k 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 ...
6
votes
1answer
51 views

carburetor failure in yamaha dt lanza

I have a problem with DT Lanza carburetor and the mechanic said I need to replace all the parts in carburetor. Can I get DT 200r carburetor on the DT Lanza 230, because it is hard to find it's spare ...
2
votes
2answers
873 views

kraftsman lawn mower runs for 10 minutes, sputters and dies

I have a Kraftsmann 550 series push lawn mower with Brigg and Stratton engine that runs for about 10 minutes and then sputters and dies. I can start it again after prime it again, but it will run for ...
6
votes
1answer
146 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 ...
4
votes
3answers
89 views

Bad pitting on carburetor causing small fuel leak

I have a Motorcraft 2150 carb which has some pretty bad pitting on the main body. The pitting caused like two small holes and is causing fuel to slowly drip. I can only see the holes from the outside ...
5
votes
2answers
1k views

Aprillia Pegaso 650 won't start after cleaning carbs, what might be wrong?

I've got a '99 Pegaso 650 which has been sitting idle for about 7 years. The carbs were quite bad shape when I got it. The first time I cleaned the carbs I was able to get the bike started but it ...
4
votes
0answers
112 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 ...
3
votes
3answers
149 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.
5
votes
3answers
1k views

straight pipes and carb rejetting?

I have a 1984 Honda GL 1200 standard wing and I am going to put straight pipes on it, however some forums say I will need to upjet the carbs, and others say I will not. Has anyone on this site ever ...
3
votes
2answers
57 views

Temporarily stop fuel going to carburetor

A couple of days back I noticed my 2011 Yamaha Scorpio had begun leaking fuel whilst parked up. Upon close inspection it was just a slow drip coming from a tube near the rear of the bike. After ...
7
votes
1answer
83 views

Vespa PX 150 Fuel and Carbon issue

I am using Vespa PX 150.It is using Contact Point system. The issue is it is consuming fuel more than average and the plug is full of carbon after approx 50 Km.The engine not start unless I clean the ...
7
votes
3answers
6k views

Motorcycle popping on acceleration

I have a 1975 Honda XL250 that I bought earlier this summer. Up until recently its been running great. It was leaking a little gas, but nothing too serious. When it started to get worse, I opened up ...
7
votes
2answers
7k views

Carburetted motorcycle stalls when accelerator is applied

My father has 1995 Kawasaki VN 800 Vulcan with low kilometrage (18 000, 11 000 miles). We had installed new Vance & Hines pipes on it (in hindsight, way, way too loud, but that’s beside the point, ...
2
votes
3answers
2k views

One cylinder not firing, GSX R 750 W

What could be possible reasons that one of the four cylinders (the left or first one) is not working? It was working before, than it did not, then it did again and now not again. I was able to start ...
7
votes
1answer
125 views

Rough idle while warming up, goes away after a tiny rev

I have an 84 Ranger 2.8L V6. It seem that nearly every time I start the car, it has a pretty rough idle while it warms up. If I just rev the engine a little bit for a second and release (just barely ...
3
votes
2answers
162 views

Yiben YB50QT 50cc Scooter - Carburetor Component Identification Question

[![Yiben 50cc Carby port identification ]1]1I am trying to get this scooter going after sitting in a shed at a nursing home for 4 years. I have started by cleaning the fuel tank, installing a new ...
5
votes
1answer
30 views

Snowblower - 2 cycle oil without stabilizer

I'm not sure if this is the correct forum for this question. I have some 40:1 mixed gas (for my snowblower) that is about 6 month old with no stabilizer added. I haven't t tried it yet but should ...
4
votes
2answers
183 views

Lost torque on my Yamaha XVS650

I have a Yamaha DragStar 650 1999. I have a Highway Hawk exhaust and I removed the baffles. Now the exhaust is completely open. When the engine is cold I can start it only if I pull the acceleration ...
4
votes
1answer
595 views

How to let off the carburetors of a 1993 Suzuki GSX-R 1100 for winter storage?

My '93 Gixxer is in the shed for winter. I had it fully tanked, the shed is (moderately) warm, and every couple of weeks I attach a trickle charger to its battery. However, I know that there is still ...
4
votes
2answers
165 views

Why does the bike idle lower after balancing carburetors?

I have just balanced my bike's carburetors (they were initially way out of sync) it idles lower and seems to smoke more when I rev it (smells rich). Returning it to it's previous out of sync setting ...
7
votes
1answer
442 views

Old Briggs Dies After Running / Tilt Kills

I've got an old (1988) 8HP Briggs & Stratton engine (195422-0751-01) on a leaf blower with some problems. Symptoms: After ~10 minutes of running okay, (choke open, 1/3 to 1/2 throttle), it ...
3
votes
3answers
884 views

Derbi Senda 50cc - Low Compression, will not run properly

I have a Derbi Senda SM 50 2005 plate. It has a good spark, however, it's not reading any compression. It's had a new top end and gaskets! What could be wrong? Sometimes it starts when you bump ...
4
votes
1answer
435 views

Old gas in 2 cycle engine

I have a 2 stroked engine that sat for over 2 years. I drained the gas and can get it to turn over when I put starter fluid in the carb. it is blowing out a water substance from the muffler and cuts ...
2
votes
0answers
225 views

2008 Honda Rebel 250 idle problem [closed]

I have a Honda Rebel and it's been running great for the last year. It does have about 8000 miles on it but I haven't had any serious issues. Lately, I noticed the idle was higher than normal. It ...
2
votes
1answer
240 views

Swapping the carbs on my ducati m600

The mixer screws are totally seized on the carbs of my 1994 ducati m600, I have found a good set of carbs from a 1997 m600 but will they fit my bike?
2
votes
1answer
77 views

Tuning an ancient carbureted Honda motorcycle

I was in an accident recently. Tboned by a minivan at an intersection. Totaled my nice bike. My buddy gave me an old rust bucket he had laying around just to get me to work for a few weeks until I ...
2
votes
1answer
336 views

Moped bike motor problem carburetor

I have tried many technicians but none have solved my problem. I had problems in the past past, but one day my bike started to make a noise while opening the throttle when cold after about 50km/h ...