Question about Yamaha YZ 450 F Motorcycles

1 Answer

Will not crank not firing - YZ 450 F Yamaha Motorcycles

Posted by Anonymous on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Yamaha Master
  • 40,642 Answers

Hi, Anonymous and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Fuel line to carburetor or throttle body pinched or kinked.
8. Carburetor float stuck.
9. Fuel injectors clogged.
10. Severely discharged or damaged battery, you need 12.5 volts or better and be able to pass a load test if necessary.
11. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
12. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
13. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2, TPS, ETP, IAC,or BAS).
14. Faulty neutral, clutch lever, or kickstand safety switch.
15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box if applicable.
17. Tilt sensor needs a reset.
18. Security system not disarming alarm needs a reset.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
YZ450F 07 Wont start after top end rebuilt please help YZ 400 426 450
2007 YZ450F starting problem
YAMAHA YZ450F Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Posted on Aug 08, 2016

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

1999 foreman TRX450SX just quit and want crank its getting no fire


Check the electronic ignition see if you have power at the key switch

Aug 14, 2016 | Cars & Trucks

1 Answer

2001 1200 sportster cranks and backfires, carb and fuel good, could it be crank sensor?


Wasted spark system. If fuel and electrical is all good/correct it is often the case in these symptoms that motor cycle spark plugs that although looking good and firing outside of the engine are breaking down and will not fire under compression pressures on a power stroke but will fire unburned fuel on the unpressurized exhaust stroke when the plug again fires in a wasted spark ignition system and when so firing the result is a backfire, usually quite loud.

Jul 23, 2014 | 2001 Harley Davidson XL 1200 C Sportster...

1 Answer

Car is fireing an getting gas but want crank


if it cant crank there is no spark , there will never be fueling.
The starter is first. does it crank over the crank shaft fast.
yes, i must guess.
then next is spark, with no spark , EFI cuts fuel. (no fires)
so if it cranks the crank shaft fast (look) then check spark now.
on all cylinders not just 1.
then post. results for step 3.

Jun 23, 2014 | 2000 Hyundai Elantra

1 Answer

1990 Oldsmobile toronado will not crank


If your check engine light is on get it scanned. If not pull the camshaft sensor and make sure the magnet is still in place on the cam shaft. You might need to crank it once or twice to turn the camshaft.

Jun 15, 2013 | 1990 Oldsmobile Toronado

1 Answer

89 camery no start , has fuel p.s.i. , injectors fireing , spark on all plugs , compression even across


Have you checked cam timing?If it has jumped a tooth or two it will not start.

Jun 18, 2017 | 1989 Toyota Camry

1 Answer

91 Cherokee will crank but won't fire. Replaced


how much is the RPM showing in the datatlogger while cranking?

Dec 03, 2012 | Cars & Trucks

1 Answer

Why does a crank sensor not get any fire on a 1995 ford windstar


The crank sensor generates its own voltage.
If you connect a V/O meter to it, and set it on AC volts, you should see a couple of AC volts when cranking.

Sep 01, 2012 | 1995 Ford Windstar

1 Answer

Replaced crank shaft 99 blazer, how do I orientate the crank shaft to the cam? I have set the arrow on the cam gear down turned crank till number 1 piston is very near TDC in alinement with V on the crank...


4.3 liter, right? I think you have it right--see pic below. So it cranks but no fire happening? Did you check firing order, etc.? Getting sparks? Fuel pump coming on? Injectors firing? If you had the engine out of the car, make sure you got all the ground wires back in place, etc.


jturcotte_356.gif

Dec 01, 2010 | 1999 Chevrolet Blazer

2 Answers

THE ENGINE CUT OFF CRANKED ONE TIME THEN SHUT


Sounds like your fuel pump is going bad. Have your mechanic do a pressure test on it.

Nov 06, 2009 | 1988 Mazda B2200

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

11 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

281 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers

Tony

Level 3 Expert

2600 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...