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I have changed self start motor ,coils and battery all are new but the bike is not starting in self it is aking the stroke but the power to plug is not sufficient

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If spark is at the plug
not much left to replace

Posted on Apr 27, 2017

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  • Power Master
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Low cc engines

if spark is at the plug
not much left to replace

fuel delivery blockage
loss of compression
is the timing out

i have changed self start motor ,coils and battery - b3e5b880-fcd1-45d9-a914-76eb0d37ac1b.jpg

Posted on Apr 27, 2017

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2 Answers

The coil on my 125 cc pit bike broke every time that I started the bike, I run the bike for a little while then go off killin the coil, I have tested two coil and both broke


Hi, Jose and the usual suspects are:
1. Wrong coil for service application.
2. Damaged or worn out spark plugs.
3. Spark plug gap too wide.
4. Damaged, leaking, worn out spark plug wires, boots, or center cap connectors check for spark leakage in the dark.
5. Excessive vibration due to the loose mounting bracket.
6. Faulty ground 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.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
Bad Stator Fix Don buy new stator for your engine Create battery op...
ELECTRONIC IGNITION
http://mypitbike.ru/downloads/ThumpstarServiceManual.pdf
http://www.miniriders.com/tech-talk/29110-pit-bike-repair-parts-manuals-exploded-views.html
http://mypitbike.ru/downloads/SSROwnersManual.pdf

Dec 03, 2016 | Pit Bike 125cc 4 Stroke Dirt Bike

2 Answers

Triumph T120 1968 spark problems


Hi, I would suspect that the dual coil is the problem, normally on the Bonnie you have a spark every other stroke. Because the engine is a parallel twin (both pistons go up and down at the same time) you are firing both plugs every time the pistons are on the ignition stroke. This is why you get a shock the HT has to go somewhere and you are releasing this to the frame when you take out a plug. Dual output coils are really designed for 4 cylinder bikes where the second spark can be lost during the firing cycle. Most old Honda's CB400/500/550/750 used the dual coil ignition system. You need to have a coil for each plug as you had before. Hope this helps

Mar 07, 2015 | Triumph Motorcycles

2 Answers

Weak fire on pocket bike


Hi, I do a lot with these bikes, I think if you are getting a weak spark there is a couple things to check. First, do you understand how it builds the power to create the spark? The magnet in the flywheel has to be very close to the magnito or coil, if the gap is too much it will cause a weak spark, if the magnet is weak, weak spark, if the coil is shorting internally, weak spark. If the plug wire is damaged, weak spark. I hope this helps you.

Jan 25, 2015 | Quad 47 cc / 49 cc Pocket Mini Bike...

2 Answers

Theres no spark and bike wont start


you will have to check lead to spark plug then lead to coil
if your not getting spark at plug it could be a number of things ingintion
or just a loose wire best of luck hope you solve it

Mar 15, 2014 | Pit Bike 125cc 4 Stroke Dirt Bike

2 Answers

Scooter has new battery, new spark plug, and catch new gas. Turns and turns but wont


IF it is a 2 stroke engine the problem will probably the 2 crankshaft seals are hard are no longer allowing crank pressure when the piston moves down hence you will not get a charge for the next compression stroke.

Mar 03, 2013 | Motorcycles

2 Answers

I have a hero honda karizma 2005 model and bike stops after running for 10 kms... i have changed the battery, new chains, new spark plug also done


make sure u gittn proper cooling -is it water cooled--the heat will fry engine soon and also heats up wiring and components so they stop workin--getta clymer manual or a bettr mechanic--ur loosen money on rong solution

Feb 26, 2013 | Motorcycles

1 Answer

The bike was running last fall but will not start now but the plugs are not getting any spark, the bike will roll over though.


Is the bike an electric start or a kick start? When you say that the bike will roll over, do you mean that the motor will turn over? If it is an electric start, then it should be able to turn the motor over easily for a few seconds. If it drags or slows down quickly go right to the battery and check open circuit voltage or have the battery load tested. If it has an ignition module, then it might not start to trigger until a certain cranking speed is reached. This a common problem for batteries that are left out in the cold during the winter months. You might just need to give it a charge with a trickle charger. If the battery is OK, then check for power at the coils using a test light. If there is no power at the coils, then check for a fuse or fusible link. If there is power, then it could be a failed ignition module or CDI box. You might be able to have these tested at a bike shop.

May 19, 2011 | Honda Honda Super Splendor Motorcycles

1 Answer

Xs750 what is the firing order


There is no firing order. Your bike has a coil that fires on both the compression stroke and the exhaust stroke (also called a wasted spark). Therefore either plug wire can go on either cylinder and the bike should run the same.On four cylinder bikes this meant that you could run four plugs using only two coils and two sets of points instead of four coils and four points.If the bike is running poorly try new spark plugs and new spark plug caps first(start with the cheap stuff). Next check the actual coil and pulse pick up or points. You may have to replace the coil only because the wires are cracked shorting.

Jul 25, 2010 | 1979 Yamaha XS 650 SF

1 Answer

WONT START


Not so many reasons she won't start. 4-Strokes are Simple!

Here they are:

Motor:
Fuel Tank-> Fuel Line-> Fuel Filter-> Carb-> Intake (Valve)-> Piston-> Exhaust (Valve)-> Muffler

Carb (Old Style):
Fuel Side:
Fuel Bowl-> Float-> Needle Seat-> Fuel Ports (Venturi)
Air Side:
Air Filter-> Carb Air Intake-> Butterflies (2)
(Clean 'em ALL!)

Hardware (Motor):
Rotor (Magnets)-> Magneto (Ignition Coil)-> Spark Plug Wire-> Spark Plug-> Cylinder Head (Spark Plug Ground)

Ignition:
Kill Switches (Seat, Clutch, etc.)-> Spark Plug/Ignition Coil-> Ground
Key Ignition-> Battery->Starter/Generator

If one of those fail.......= Non-Starting 4-Stroke!

Fixes-
Fuel:
You are either getting too much, or too little. Too much = Carb.
Too little = Carb. Therefore, tear down the Carb (COMPLETELY-Careful!) and clean it up.

Electrical:
Grounding out the System (Kill Switches)
Battery-> Ignition-> Starter.
Magneto->Plug Wire->Plug (Check 'em all!)


May 28, 2009 | Mtd Garden

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