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
248
questions
25
votes
4
answers
474k
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 ...
user460
21
votes
3
answers
3k
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 ...
- 1,005
12
votes
2
answers
2k
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?
- 277
12
votes
1
answer
6k
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 ...
- 141
12
votes
3
answers
3k
views
How do you get the carburetors out of a 1983 Kawasaki KZ1000 P?
It's a 4-cylinder engine, and the carbs are really wedged in there. The best way I know is to loosen the boots on both sides, pull the carbs back, and try to slip them out sideways, but what a pain! ...
- 2,457
10
votes
2
answers
1k
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 ...
- 101
10
votes
1
answer
612
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 ...
- 203
9
votes
2
answers
957
views
Carb. Rebuild or Adjustment?
Just put a rebuilt 2 stroke and brand new Mikuni SBN carburetor in my jet boat. Got her running no problem the first couple times, now it seems I can't get any gas into the carburetor from the primer ...
- 489
9
votes
1
answer
2k
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 ...
- 8,946
9
votes
1
answer
5k
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 ...
- 233
9
votes
2
answers
122
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 ...
- 3,737
8
votes
4
answers
28k
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 ...
- 201
8
votes
2
answers
2k
views
How to troubleshoot carburetor?
I am facing poor fueling with my carburetor in my 2011 Yamaha Fz 16. What are there trivial trouble shooting checks I need to do to diagnose the issue??
Edit:
When ever I am driving in low RPM, I ...
- 183
8
votes
2
answers
24k
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, ...
- 2,420
8
votes
2
answers
772
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 ...
- 81
7
votes
2
answers
2k
views
Ducati Monster M600 - Engine Vibration/Cold Cylinder
I have a 1995 Ducati Monster M600. Recently I noticed an engine vibration and whilst trying to figure it out I noticed that the horizontal cylinder exhaust is hot (hot enough to burn leather gloves) ...
- 2,665
7
votes
1
answer
2k
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 ...
- 131
7
votes
1
answer
1k
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 ...
- 1,196
7
votes
1
answer
6k
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:
Disassemble ...
- 171
7
votes
1
answer
3k
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 ...
- 73
7
votes
2
answers
784
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.
...
- 2,964
7
votes
3
answers
554
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 ...
- 8,403
6
votes
2
answers
5k
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 ...
- 1,005
6
votes
2
answers
27k
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 ...
- 163
6
votes
2
answers
13k
views
Properly draining a motorcycle carburetor
How does one properly drain a motorcycle carburetor and ensure that no additional fuel drains into the fuel bowl(s)? I opened the two draincocks seen above the choke in the photo below, but even after ...
- 575
6
votes
2
answers
138
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,...
Mike G
6
votes
1
answer
3k
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 ...
- 163
6
votes
1
answer
722
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 ...
- 61
6
votes
3
answers
63k
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 ...
- 686
6
votes
2
answers
44k
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 ...
- 63
6
votes
1
answer
1k
views
Why do NASCAR (Sprint) cars still use carburetors?
The wikipedia entry for carburetor tells me that the last US domestic carburetted engines were produced in the early to mid-90's. So why does NASCAR still use them?
Are they easier to build, repair, ...
- 375
6
votes
1
answer
13k
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 ...
- 163
6
votes
1
answer
2k
views
What could be the result of this missing o-ring?
Consider this o-ring :
And this full diagram if you need a more global view :
For completeness sake, here are the real parts :
Where the o-ring goes :
Where the little hole leads :
The other end ...
6
votes
1
answer
485
views
Same engine but different intake manifold design: which one should I use?
The engine I'm rebuilding (Skoda Estelle '72, RWD, rear mounted engine) is the same from previous models, with slight different changes. One of the things they modified was the intake manifold which, ...
- 3,346
6
votes
1
answer
1k
views
Are there any throttlebodies known to fit as replacement for SU carbs?
I'm planning to build injection in an engine that originally uses two SU HS6 carbs. At first i planned to use the carbs themself as throttle bodies, but they're rather worn out, and they don't have ...
- 2,964
6
votes
3
answers
423
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 ...
- 824
5
votes
2
answers
1k
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 ...
- 65
5
votes
2
answers
626
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 ...
- 81
5
votes
2
answers
2k
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 ...
- 51
5
votes
5
answers
10k
views
High altitude adjusment for carb 4stroke. (honda xr650l)
Hi I am having some problems with my honda xr650l (1995). During acceleration I experience a sort of stuttering loss in power. Almost the same feeling as runnning out of gas in the main tank. but the ...
- 193
5
votes
1
answer
21k
views
How to determine what carburetors will be compatible with a motorcycle?
What are the parameters to determine whether or not motorcycle carbs are compatible with a certain engine? Is it just the size?
For example, I have a 1978 Suzuki GS1000 with Mikuni carbs, and it's ...
- 75
5
votes
3
answers
12k
views
Motorcycle Leaking Fuel (1999 CBR600 F4)
Just fired up my motorcycle after 3 years in storage. Changed the oil and replaced the fuel in the tank. It starts easily. It is leaking fuel from somewhere under the gas tank. The engine has a ...
- 155
5
votes
3
answers
5k
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 ...
- 51
5
votes
2
answers
11k
views
How do I prime a carburetor safely?
I have an old Falcon that's been sitting for six months and won't start. The battery is fine -- I'm pretty sure the issue is that the gas in the carb has evaporated. As I understand it, the solution ...
- 151
5
votes
2
answers
4k
views
Aprillia Pegaso 650 won't start after cleaning carbs, what might be wrong?
I have a 1999 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 was ...
- 668
5
votes
1
answer
81
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 ...
- 1,005
5
votes
1
answer
86
views
Gas filled my engine
I'm a little puzzled on my 33 I have a 302 ( stroker 363 )) Dart block with brodex heads with a small blower. after blowing up my power glide I pulled the engine and just now reinstalled it. after ...
- 49
4
votes
3
answers
14k
views
Float carburetor leaking gas
I have a Troy-Bilt rototiller that I put back into service recently (piston was rusted in place; exhaust valve was rusted shut; etc.), but I still have one major issue with it, and that is that the ...
- 5,235
4
votes
3
answers
573
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 ...
- 1,196
4
votes
1
answer
3k
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 ...
- 41