Question about 1980 Yamaha XS 650 G

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Im looking for some help finding some carb rebuild kits and maybe some bigger jets as i'm going to run open element air filters. The filter manufacture said to run 25% bigger jets. The bike gets spark and it makes attempts to start but it just wont take off. Also my starter doesn't seem to engage, all you here is the gears spinning. Anyone know of a cheap set of slip on mufflers that work well with these bikes? thanks

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If it has been sitting for awhile you might need to clean the carbs -clean the stock carbs and get it running before making changes -check comp. as well-bike bandit seems to have a good selection of older bike parts

Posted on Jun 27, 2009

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The blower will start after you go through the Full choke then it goes dead. Move to half choke. It cranks and runs wide open for 2 -4 seconde and goes dead. Does this over and over. Will not stay running....


Check the following, and then clean or replace:
  • Fuel Filter - Located INSIDE the fuel tank
  • Spark Plug
  • Spark Arrestor - at Muffler
  • Carburetor - May need a rebuild kit
Also watch this...

and this one...

Mar 17, 2015 | Poulan Pro BVM200VS - Blower and Vacuum:...

1 Answer

17.5 carburetor jetting speedfight 3 AC RS


Hi, Gavin nice novella if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" your not getting enough fuel.
1. Closed to 1/8 throttle is managed by the air screw and pilot/slow jet.
2. 1/8 to 1/4 throttle is managed by the air-screw, pilot/slow jet, and throttle slide.
3. 1/4 to 1/2 throttle is managed by the throttle slide and jet needle.
4. 1/2 to 3/4 throttle is managed by the jet needle, needle jet, main jet, and air jet.
5. 3/4 to wide open throttle is managed by the main jet and air jet.
6. Wide open throttle is managed by the main jet.
If you are running lean, spark plug electrode color is white, engine runs hot and feels like it is starving for fuel you need to go up on the jet size or move the c-clip down one notch. If you are running rich, spark plug color is black or dark gray, engine runs cool, and bogs down when accelerating you need to go down on jet size or move the c-clip up one notch. When your carburetor is properly tuned for maximum performance your spark plug electrode will be a light tan color like coffee with cream. If you prefer fuel economy over performance you can go down on main jet sizes until a satisfactory level of lower performance is acceptable versus MPH, your spark plug color will be whiter and your engine will run warmer. These tuning adjustments will only make improvements if your intake and exhaust system have no air leaks or sealing issues and the entire electrical system is in proper working order and you have no mechanical issues. For more information about your issue and valuable "FREE" downloads that you will need please click on the websites below. Good luck and have nice a day.
Life On 2 Wheels
50cc GET Carburetor Basic Tuning
PEUGEOT SpeedFight 3 Workshop Manual
Browse Product Categories
PEUGEOT Speedfight 2 Owner Manual

Mar 24, 2017 | Motorcycles

1 Answer

1992 Suzuki GSF 400 Bandit carburetor jetting


Hi, Crazystang79 if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" your not getting enough fuel.
1. Closed to 1/8 throttle is managed by the air screw and pilot/slow jet.
2. 1/8 to 1/4 throttle is managed by the air-screw, pilot/slow jet, and throttle slide.
3. 1/4 to 1/2 throttle is managed by the throttle slide and jet needle.
4. 1/2 to 3/4 throttle is managed by the jet needle, needle jet, main jet, and air jet.
5. 3/4 to wide open throttle is managed by the main jet and air jet.
6. Wide open throttle is managed by the main jet.
If you are running lean, spark plug electrode color is white, engine runs hot and feels like it is starving for fuel you need to go up on the jet size or move the c-clip down one notch. If you are running rich, spark plug color is black or dark gray, engine runs cool, and bogs down when accelerating you need to go down on jet size or move the c-clip up one notch. When your carburetor is properly tuned for maximum performance your spark plug electrode will be a light tan color like coffee with cream. If you prefer fuel economy over performance you can go down on main jet sizes until a satisfactory level of lower performance is acceptable versus MPH, your spark plug color will be whiter and your engine will run warmer. These tuning adjustments will only make improvements if your intake and exhaust system have no air leaks or sealing issues and the entire electrical system is in proper working order and you have no mechanical issues.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Carb Rebuilding Needle Jets Jet Needles etc
Carburator Theory and Tuning
Suzuki GSF 400 BANDIT Service Manual
OEM parts for Suzuki
http://mybikemanuals.com/suzuki

May 17, 2017 | 1992 Suzuki GSF 400 Bandit

1 Answer

Starts fine but dies when set to run.


You either have a air leak in a fuel line, carb jets are plugged, or carb seals went bad. They sell a rebuild kit for your carb, 10-15 dollars. I would start by removing carb spraying it with carb cleaner and blowing it out with a air gun, put it back on and see if this worked. If not I would replace fuel lines and rebuild carb.

Jul 25, 2010 | Poulan Garden

3 Answers

Air box


Because the K&N filters are much less restrictive than the original airbox and filter, the bike may run lean, and you MAY have to have the carb jets reworked/changed.

May 20, 2010 | 1995 kawasaki Zephyr 1100

1 Answer

Changed from standard air box air cleaner to pod


Going to the manufactures specs or anybody's specs for that matter won't help you, you have interrupted the air flow, Get an adj jet from Dyna flow, I did the same thing, went back to the oem specs and still wouldn't run. Got a Dyna flow kit and off it went. Those things are expensive but worth it. Plus they are adj. And you get a free dyno check if you ever find somebody with a dyno tester. My Mikunis were a little newer, but I'm sure they got something. I found mine on Ebay. Hope this helps.

Apr 16, 2010 | 1983 Suzuki GSX 1100 E

1 Answer

Motor wont idle


Sounds like dirt in the idle jet.I would get a carb rebuild kit and a can of carb cleaner and blast out every hole inside the carb.(Use safety glasses)Also make sure the float level is set perfectly to factory specs.Then if you have compressed air blow the carb out with that. Look inside the little idle jet and main jet holes and be sure nothing is blocking them. Install a good inline fuel filter before you start the bike.
Maybe even drain the tank to be sure most dirt is gone from tank.

Oct 02, 2009 | 2004 Suzuki RM 250

1 Answer

Runs with choke on but pitters out when i take choke off


Will it idle ok or is it not running at higher rpm?
First......take the gas line off at the carb and check for a good flow of fuel to the carb.No flow means ...check for blockage at the tank glass bowl filter....take the glass off and open the gas valve....any flow?......if not unscrew the glass bowl assembly and clean that filter screen......you will need your wife to hold her finger over the hole on the tank while you check that screen,get a snack and a drink.
If flow was good to the carb .....try turning the main jet out a few turns (the bigger of the two jet adjusters) (they usually have a place for a flat screwdriver slot in them)The small one is idle mixture.
If that does not do it......there is a small screen filter where the fuel line goes into the carb....unscrew that and check for dirt.
TIP.DO NOT BLOW AIR THROUGH THE JETS THE CLEAR THEM ON THIS CARB.You will compress the float.
If the above didn't do it......
This carb is VERY simple to work on.
Get a carb kit then dissasemble it and clean every hole and passage you can find....install the kit and It will run well for years.

Aug 13, 2009 | Ford 8n,9n,2n, Tractor Starter With Drive

3 Answers

Poulan 6.75 Lawn mower will not start


Remove spark plug, clean and dry. Replace plug. Remove air filter. Spray WD-40 into carb opening; one second blast. Turn over engine, (pull handle). Engine should start briefly and run for 3 seconds.  If not, you are not getting spark to spark plug. If engine starts, you have a dirty carb and you can buy a rebuild kit from manufacture.

May 02, 2009 | Poulan Pro " Pro" Self Propelled Mower

1 Answer

Overheating


  • First I would go get stock plugs from the dealer. Plugs with incorrect heat range can cause overheating.
  • Drain the oil and replace the oil filter. Refill the crankcase with fresh oil. Also be sure exhaust gasses are getting through the exhaust pipes okay
  • Check the spark timing. and clean or replace the air filter.
Your mechanic probably installed carb rebuild kits in each carb. This is good but the correct main jets may not have come in the generic kits he bought. Too small a main jet can cause overheating. Pull the float bowl of whichever carb is easiest to get to. Remove the main jet and look to see what size it is. There will be a number i.e. 3.0 stamped on the jet. Call your dealers parts department and ask what size main jet is stock. The smaller the number, the smaller the jet. Re-jet the carbs if needed.

I hope you can rate this solution as a "FixYa". Thanks!

Mar 17, 2009 | 2001 Suzuki GSX 600 F (Katana)

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