Question about 2002 Ducati 748

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02 748 that was dropped on it's left hand side. bike will start but it feels like it's running on one cylinder. I checked spark, fuel and compression. Could it have jumped out of time? whot would you think the problem is?

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No, it could not jump time from being dropped. Check for vacuum leaks in the intake system. Something could have been moved, allowing air in where it isn't normally supposed to go. Also check your electrical system - battery connections still tight, no wires pulled taunt anywhere, none broken, no alternator or voltage rectifier cover slightly cracked or dented, shorting out.

Posted on Jan 11, 2009

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1 Answer

WHAT IS THE PROBLEM IF THE BIKE WILL START THEN SHUT OFF????


How long have got ? Has the bike been stored some time? If so fuel could be bad. Was it left in weather fuel still could be an issue. Is the fuel valve opened or trash in the screen? Have you checked plugs? Old way is to turn over engine an with hand over muffler does air feel warm coming out. If so you have spark. Or lay plug on ground an watch for quick spark. Fuel lines old, or cracked, may be sucking air. Is fuel reaching carb, so many things to check but you will have to step it through. Make sure you have spark, then go from there.

Jan 27, 2015 | Motorcycles

2 Answers

Where are the spark plugs located on the bike ? are they under the seat ?


on the cylinders or in the heads on the out side of the engine ethier the right or left side.

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1 Answer

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i would actually replace the caps and leads on side not working, a bad connection may still spark when not under pressure, then test coil before i think about cdi

Feb 17, 2013 | Motorcycles

1 Answer

Triumph America 2004. Shortly after purchasing second hand, the bike started to only fire on the left hand cylinder on starting. However after driving between 1km and 10kms the 2nd cylinder would fire up...


You might try looking at your transistor it could be the cause of your problems. Even though it is a carb bike it will still have an transistor pack or similar that controls your spark. It is possible that failed. Try one from a bike that you know is working if that makes a difference that is your problem.
Although I'd also look for broken wires and poor contacts.
If your good with a multimeter and you know the specs of your coils and transistor than you can try and test them.

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1 Answer

1998 Honda CBR 400 only running on 2 cylinders


Hi, Tj20262 you need "FIVE" things in order for a cylinder to run properly:
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3. COMPRESSION: you must have at least 80-100 PSI for most bikes, multi-cylinder engines should be within 10-15% of each other if not perform a leak down test you may have a burnt or bent valve or hole in the piston or broken rings.
4. CAM TIMING: confirm your timing marks are aligned to see if the cam chain or adjuster are worn out and the chain has skipped a couple teeth.
5. IGNITION TIMING: on older bikes check to see if your points have not closed up, timing plate has not become loose and confirm with a timing light for proper retard and advance functions, on newer bikes where timing is controlled by an ECM and is nonadjustable check you CKP, TPS, MAP, O2, sensor or its counterpart for integrity.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
http://www.fireblades.org/forums/honda-cbr-600/61533-f3-two-cylinders-not-working.html
two dead cylinders please help CBR Forum Enthusiast forums for Honda CBR...
http://service.tanga-moteurs.ro/data/Honda_CBR_400_Repair_Manual.pdf
https://www.partsfish.com/page/oem-parts-for-honda
Honda Cbr400rr 1988 1999 Service Repair Manual

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1 Answer

Runs without plugwires on shuts off when you put it in gear


Your cycle runs when you pull off one spark plug wire per cylinder. There are two spark plugs per cylinder and you did not remove both . Therefore you still have one spark plug on each cylinder firing to run the machine. Your motorcycle is also equipped with a side stand safety switch. Your bike will run on the side stand . But, if you put the bike in gear with the side stand down it is designed to turn off the motor. This is so you do not drive away with the stand down and loose control of the motorcycle on your first left hand turn. Get in the habit of putting your side stand up before putting the bike in gear and your problem is solved. Read your owners manual.

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1 Answer

Right hand cylinder on my rd200 not firing properly, the bike will run, starts perfect, exhaust gets warm on right hand side but no power to ride, any ideas?. have put in new spark plugs, leads and caps,...


Assuming you properly cleaned the carburetor low speed circuit.check the list below.
1.Check the compression on the right hand cylinder.
2.check your points,pull the point cover off start the bike and watch the points if you see bright sparks at the contact point the condenser is is bad.
3.If your constantly getting an oil fouled plug the right hand crankshaft seal is leaking transmission oil into the crankcase.
4.check your fuel flow from that line to that carb.
Hope this helps you determine whats going.


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1 Answer

My bike won't start


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1 Answer

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It seems the charging system of your bike is not working
Recharge the battery and thn fit it in the bike and start it and check the charging rate.
Remember with lights 'on' it drains power from the battery butthe charging system of theengine takes over i.e. if its working alright, with your explanation, its for sure the charging system is not functioning.
Chekc the altenator and the rectifier.

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1 Answer

1978 YAMAHA RD400E NO SPARK ON ONE CYLINDER BIKE RUNS ON


Hello,

Remove both sparkplugs from engine. Plug them back in the sparkplug cables and let them rest on the engine.
Make sure your battery is well charged.
Check for sparks while kick-starting...
Interchange the sparkplugs in the cables:
-Same plug give sparks: replace the spark plugs.
-Same side of engine sparks: interchange the low-voltage connector at the ignition coils.
Give it a try:
Same engine side sparks: Replace the defective ignition coil.
Other side of the engine sparks: Check the circuit harness for loose connectors, and/or Clean-replace the breaker points ( left side of the engine carter ).

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