Question about Honda CRF 450 R Motorcycles

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No spark toke coil off tryed it on another and it worked put wont work on my bike whats wrong

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The coil may not be the problem on your bike you may have a bad ignitor it is module on the the bike usually located under the gas tank or near the battery.

Posted on Mar 11, 2011

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My tomos streetmate r was going full throtle and it started to misfire then the engine died . Wont start and nospark coming out of the sparkplug. whats wrong?


inspect wires for conection n corrosion--coil cud be worn-is it real hot--battery can fail at any time-testit--getta clymer book or other for complete bike work

Aug 20, 2012 | 2008 Tomos Streetmate

1 Answer

I recently got a 74 sportster 1000 reverse controlls. sat in a garage for 20 years bike not ridin bike is complete. Im mechanically inclined but not very good with bikes. So my terms an wording is probly...


Dustin:
Your terminology is off a bit but I'm trying to figure out what you say you have done. To start, the coil off the 82 model is the wrong coil for your bike. Your bike has a points type ignition and requires a coil with a primary resistance of 5-6 ohms where the 82 model coil is for an electronic ignition with a primary resistance of 2-4 ohms. If you know how to check the resistance of the primary windings on the coil, check and see what you've got.

But, if you had the bike running and after you put everything back together, you evidently shorted out the points. Use a test light and check for power to the coil. If you have power to the coil, check the black wire coming from the right side of the coil down to the timing cavity. Take the plate back off the timing cavity and see if anything is grounded that shouldn't be. Use the starter to spin the engine over and make sure the points are opening and closing.

Good Luck
Steve

May 18, 2011 | Harley Davidson XLS 1000 Motorcycles

1 Answer

Runs then sputters and wont start


you might need to clean you stator(altinator) or maybe get a new one for you spark to work right if you have already changed the coil.also bad gas can do it also or low fuel.when the tank is low put your bike gas valve on reserve.A friends bike was running badly and all i did was put it on reserve cause the tank was low and the bike ran great after that.

Jul 01, 2010 | 2000 Harley Davidson XL 1200 C Sportster...

1 Answer

Bike will start and warm up fine. after riding till its up to operating temp (running fine) no missing , or other problems, if you shut it down, it wont start back up- it just pops, and backfires. only way...


Seems as I've answered this question before. I hope I haven't answered for you already because if I did, the information I gave you didn't work.

First off, you've got to determine why the engine is not starting. An engine needs three things to run. Compression, Ignition, and fuel. Since it's doubtful that your compression has just went away without some catastropic event taking place, that leaves ignition and fuel. So, we have to determine which is the culprit.

Ignition, if you or a friend has a spare spark plug, pull a spark plug wire off a plug and put the spare plug in there. Hold the spark plug firmly gournded to the engine and try to start the engine. Watch the plug to see if you're getting a spark. If you are, proceed to the fuel checks. If not, you need to deternine why not. Since you said you replaced the coil, did you put the correct coil on the bike? Using an ohm meter, disconnect the wires from the small terminals of the coil and test the resistance between the two connections of the coil. The primary resistance across the coil should be 3-4 ohms for an electronic ignition like ou your '93 model. If the coil checks good, there is an ignition black box under the triangular plate on the left side of the box. The service manual tells you how to test this unit but you must use the speicific type of meter they use or your readings will be wrong. So, if you're not getting spark, I'd plan on replacement of the ignition unit on the bike.

If you think the problem is fuel related, you need to determine whether you have too little fuel or too much fuel. Remove a spark plug and see if wet and smells like gasoline. If so, you're bike's carburetor is flooding for some reason. It could be the needle valve or the accelerator pump. You might try turning your petcock off when you stop the bike. If this solves the problem, you need to service the carburetor to fix the problem correctly. Rebuild the carburetor. Good Luck.

Mar 26, 2010 | 1993 Harley Davidson XLH Sportster 883

1 Answer

1989 yahama fzr wont start


could be the diode. They will read in one direction only coils sound ok

Jul 26, 2009 | Yamaha XS 650 H Motorcycles

2 Answers

Bike wont start


Are you getting spark? If not, ck ignitin coil and wiring

Jun 30, 2009 | 2003 Yamaha V Star Classic

1 Answer

T140 , no spark!


cracked coil/connection?

Jun 14, 2009 | 2001 Triumph Triumph Bonneville

1 Answer

Bke wont start


Hi there, try this sometimes the stand switch can make the bike not work if has got rusted at the back.and check or replace the coil., then check if you are getting a spark from the plug by putting the spark plug on top of the head. The next thing is if the bike turns over but not fire up, you need to strip down carb and clean jets, also check petrol value under the tank If you have a book it will go through this step by step. good luck.

Feb 21, 2009 | 2005 Honda CBR 125 R

1 Answer

Wont run for more then 10 sec


If you can do your own work, try some things if its dies you ether loseing fuel pres, injector control, or spark........ the fuel pres is easyest to ck, just stick a gauge between the pump and the rail, should be 42-43lbs, on the spark pull a coil stick and put an extra plug in it and fire up the bike be careful doing this is case of fuel leaks under tank, if the bike quits and you try to start it and you still got spark this may be ok, this is a bit more difficult, you have to ck the plug connections at the coil sticks, if you ck in a service manual each coil has two wires going to it one is going to be powered all the time, the other one is grounded by the ECM when the injector is supposed to fire, a node light will help in checking this, OR you can do what most of us do, take the bike to a good suz guy that knows what he's doing

Nov 10, 2008 | 2002 Honda ST 1100 Pan European (cbs-abs...

1 Answer

Wont run for more then 10 sec


If you can do your own work, try some things if its dies you ether loseing fuel pres, injector control, or spark........ the fuel pres is easyest to ck, just stick a gauge between the pump and the rail, should be 42-43lbs, on the spark pull a coil stick and put an extra plug in it and fire up the bike be careful doing this is case of fuel leaks under tank, if the bike quits and you try to start it and you still got spark this may be ok, this is a bit more difficult, you have to ck the plug connections at the coil sticks, if you ck in a service manual each coil has two wires going to it one is going to be powered all the time, the other one is grounded by the ECM when the injector is supposed to fire, a node light will help in checking this, OR you can do what most of us do, take the bike to a good suz guy that knows what he's doing

Nov 10, 2008 | 2007 Suzuki GSX 1300 R Hayabusa

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