2004 Yamaha YZ 85 Logo

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Anonymous Posted on Feb 17, 2014

Can not get my sons yz85 to start,bike starts when carburator cleaner is sprayed into open carb,then dies off.

Have cleaned out the carb,have cleaned both jets and am not sure if this has had a negative effect,do thet need to be turned in all the way until they seat.what about the black screw on the outside of the carb how is this to be regulated.

5 Related Answers

Anonymous

  • 126 Answers
  • Posted on Feb 06, 2009

SOURCE: klx 110 2006 stalls when choke is pushed in

i'd say the carb is gummed up especially the pilot jet (#16158) in this pic of the USA carb. may have to remove the carb & bowl and then remove the pilot jet (w/ flat head screw driver) and clean out the tiny holes.

http://partsfinder.onlinemicrofiche.com/atlanticcycleandpower/Kawasaki_OEM/KawasakiDB.asp?Type=18&A=39&B=17&Action=O

-OR-

the carb slide is installed backwards (turned 180 degrees). its #16025 in the pic. i've done this before on my daughter's XR70 and Z50. you'll know if its this when you move the choke lever, RPMs increase and decrease.

hope this worked for you and was fast enough.

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Anonymous

  • 9 Answers
  • Posted on Mar 12, 2009

SOURCE: 2005 yamaha yzf 250-unstable idle

I had the same problem, Turns out that my shims were finished, replace the chims and check clearences.

Anonymous

  • 51 Answers
  • Posted on Mar 24, 2009

SOURCE: re jet carbs? any help?

if you rejet the carbs. i would maybe take a plug reading. it sounds as if you might have gone too rich and the plugs began to foul. but a good plug reading will tell alot. if they appear to have a good tan color i would take a look and make sure no hoses are being pinched causeing a fuel starve problem.
fyi. if you just put on an aftermarket exhaust. sometimes you wont need to jump up in jetting that much. stay around the stock jetting and maybe shim the slide needle up a hair with a tiny washer. that usually puts you close. unless an elaborate aircleaner system and very high flow exhaust.

Anonymous

  • 311 Answers
  • Posted on Jul 06, 2009

SOURCE: 81 xj650lh midnight maxim black exhaust, sooty plugs keep fouling

hi,fairly common problem with modified exhaust,start with the pilot screws,turn right in untill the screws are firm then back out 1 and 3/4 turns,this is a fairly standard rule of thumb that will get most things going,as far as the jets go,the original size would be a good starting point,but you should only need to go up 10-15 sizes to compensate for the exhaust mods(ie stock might be 127 may need to go to138 or 140 etc),the other thing that i would recommend is getting hold of a set of damped carb balancers these will enable you to get the mixtures and carb balance dead right,they are relitively cheap and easy to use and will have paid for themselves the first time you use them.(i regularly get 4-8 sometimes 10-11 extra hp over stock by tuning the carbs up properly).hope this helps

Anonymous

  • 1 Answer
  • Posted on Jul 18, 2009

SOURCE: TTR-125 Won't Start

unscrew the four screws on the bottom of the carb (be ready some gas will drain out) then you will see a goldish looking screw. unscrew it that is your jet

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Related Questions:

0helpful
1answer

Yz 85 2005

Did the bike sit for a long while with gas in it?

What happens over time is the gas starts to break down (go bad).
When it does this, it turns into almost a varnish.
This starts plugging the holes in the jets, and the ports drilled in the carb, starting with the smallest, which is the idle circuit.

What is happening in your case is when you spray carb cleaner down the carb, it starts and runs on that, until it's used up.

You need to remove the carb and "boil it out" (clean and rebuild), paying attention to the idle jets and ports.

This diagram of the carb might help you:

http://www.bikebandit.com/houseofmotorcycles/2005-yamaha-yz85-yz85t-carburetor/o/m145327sch299511

Again, pay attention to the idle jet (pilot jet), #8 in the diagram, inside the float bowl.
Feb 17, 2014 • Motorcycles
5helpful
1answer

Very hard to start, i pull and pull and pull on the cord but it wont start i do prime it every third pull any ideas?

Chances are your carburator has dirt in it.
It doesn't take much to clog those little carbs.
Empty the gas tank and clean it.
Purchase a can of small engine carburator cleaner. Comes in a spray can for about $5 at Home Depot or Lowes.
Remove the carburator and disassemble it.
Soak the body in clean gasoline for about 15 minutes if you can agitate it do so to help the gas disolve any clogs.
Clean the ports with the spray cleaners to blow out any debris.
Reassemble and remount the carb.
Remove, clean and gap the spark plug
Refuel the gas tank with new clean gas
0helpful
1answer

How to clean carburator

take it off and take the float bowl off and take a air and blow out all ports the the use carb cleaner and spray the inside of carb then put it back together and put back on turn the gas on to let the bowl fill up then start the bike
0helpful
1answer

79 yamaha XS 750 crank no start

well here goes your problem probably in the float bowl area water sediment blocked low speed jets if you do not want to do a complete tearmore down just clean the jets and float bowl.
Use a carb cleaner soak the jets make sure you can see through them the small low speed jets specially.
if you have access to air blow the jets clean.
spray any passage ways with carb cleaner reassemble good luck.
0helpful
1answer

I have a 6.5 hp briggs and stratton quantum pressure washer and it was working fine two months ago. Yesterday, I tried to start it and it would not start. I replaced the spark plug and air filter. If I...

its not getting any fule to carb strip down all fule lines and any fule taps to check there clean and fule flows freely then strip carb and clean out all jets,,,dont go poking wire into the jets it could distroy them use compressed air or card cleaner on jets
Mar 28, 2010 • Garden
0helpful
1answer

Bike won't start

Check compression ratio and valves clearance.The carbs leak any fuel from their o-rings.Spray through the air box with a carb cleaner spray while pressing start button but little bit at a time.Don't twist the throttle too much and always use choke until she fires up for good.
8helpful
2answers

Starts on choke but dies when moved off choke

If it will start on choke and die when choke is taken off...the carb needs to be taken off and cleaned. The main jet in the carb is probably clogged.
1helpful
1answer

Carburator problem

Hi and welcome to FixYa,

Offhand would suggest a rebuilt/clean of the carbs. A temporary workaround would be to switch off the fuel petcock, remove the fuel hose, partially drain the carbs and spray into the fuel hose (going into the carbs) injector/carb cleaner. Reinstall fuel hose, turn on fuel. Remove the air filter and start the bike. After warmup, rev while spraying injector/carb cleaner into the opening where the air filter should be. Get a hard paper/board (such as a folder) cut to a size bigger than the air filter but would fit inside the opening of the airbox. Rev/pump the bike slowly building the RPM at about 4~5K suddenly cover the opening (with the board) to fully choke the carbs while maintaining throttle. Before the engine dies, remove the cover. Spray again while revving. Repeat choking/spraying several times. The idea is for the vaccum to draw the clog/blockages.

Pls post back result(s). Good luck and Thank you for using FixYa.
0helpful
1answer

Engine dies

Your carburator is gummed up !
Take the float bowl on the bottom of the carb and spray the main fuel jet out with cleaner, do this to the idle needle valve also. If that don't work pull the carb & take apart & soak overnight in parts cleaner & blow out all ports & orfices with compressed air.
Next time you store your generator with gas in it , use a fuel stabilizer !
Good luck !
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