Question about Harley Davidson XLH Sportster 883 Motorcycles

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Cdi box moved to back of bike an have thunder heart wireing but the 2 wires come out bottom right of motor an 3 hanging off cdi how can I tell where they go 1996 883 harley all wires have been cut

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The only thing i can suggest is to match up the wire colors, same color to color if that is possible. Black being an earth.

Posted on Sep 02, 2010

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This is a 1984 1200 that will not start and back fires thru the exhaust and carbs


hello
Back fire is an indication that the bike is firing incorrectly.
Your timing chain is probably stretched, due to the year.
inproper valve timing due to stretched timing chain will make the bike backfire.

I have other thoughts like stuck valves or inproper sparkplug wires on wrong plug,
i always start with easier and less expensive method.
1st check your sparkplug wires to make sure they are on the right plug.
2nd pull sparkplugs and do compression and leakdown test.
3rd pull componets to see if valves are opening and closing, (valve clearance check)
4th if valves are good, then timing chain is probably stretched.
5th if timing chain and timing marks are good, and valves are good, then proceed to
testing the signal generator to make sure your getting a signal to the cdi,
6th if you have a signal to cdi, the cdi tells which coil to fire. either # 1&4 or # 2&3.
if signal generator is working, but coils aren't firing right then its the cdi.
obviously your coils work because its firing, just back firing.

Thats all it could be from easiest to hardest.
Good luck and have a great weekend.
Big Al

May 21, 2011 | 1987 Honda GL 1200 Aspencade Gold Wing

1 Answer

How to test CDI unit for KTM65 2009 to diagnose if faulty or not.


If you are able to use a digital volt meter and work your backwards from spark plug wire to coil to cdi to stator you can figure out where voltage stops.thats a fairly newer bike unless you really submerged that bike under water i dont think its the cdi box.it could be coil wire it could be coil.you want to check or change the cheaper parts before you go right to cdi because there not cheap.I have a yamaha banshee 350 and she was breaking up real bad.I thought because it was only happining on top end that the cdi was breaking down or stator was going bad.Found out with meter it was the coil wires and spark plug boots.These items have to have a certain amount of resistance or the do not conduct correctly.And spark plug wires and boots are not that exspensive.So thats why I say start from sparkplug boot and work your way back.Try that and Good Luck.

May 09, 2011 | 2009 KTM 65 SX

1 Answer

Hi. I have a stock 1998 kdx 200 that needed a blackbox. I bought a replacement cdi but the wiring on the bike is different to the 98 cdi unit. Colors are different too. The wiring on the bike is a kdx as...


Try following the wire from the stop button on the handle bar back to the CDI box. Simply unplug that wire. CDI is disabled by grounding. Does the KDX have a key switch or just the stop button. Try just connecting the pick up wire to the CDI and CDI to coil. You have to isolate ground to CDI to run. Check air gap at pick up. Use a matchbook for a gauge.(.018)

May 20, 2017 | 1998 kawasaki KDX 200

1 Answer

Replaced CDI cuts bike out when slightly moved or touched.


try to check your ignition coil.or your ignition switch might be grounded.

Oct 26, 2009 | 1995 Honda VFR 400 R NC30

2 Answers

1996 zx11 getting sprk to one bank only


Hi and welcome to FixYa,

The voltage on the green wire must be pulsating when cranking/starting the bike, not steady. Confirm by similarly testing the voltage on the black wire on the left ignition coil. If the green still reads a constant voltage, then the CDI is faulty; to be more specific, most likely that the switching tansistor inside the CDI that drives the right ignition coil has shorted.

Good luck and thank you for asking FixYa.

Jul 09, 2009 | 1996 kawasaki GPZ 1100

1 Answer

Bench start kv 550


Assuming it's a KZ550, first off, your gonna need the battery, ign module, rectifier/regulator, and ign. coils. There should be a wiring harness (5 wires or so) coming from the alt housing (on left crank end) with 2 yellows one pink(to rectifier),red/blk(ign power to cdi) & (light green is neutral light- not needed). Next, assuming there's no points, there should be a 2 or 3 wire harness (usually blue/brown) from ign triggers (on right crank end) these need to go to CDI module. Then make wires from CDI module to coils. Don't forget to ground everything to motor case. Also if it's electric start only, your gonna need the start solonoid ,too. If you want a detailed wiring diagram, let me know what color wires & how many there is on the rectifier/regulator and CDI and the motor and I can email you a diagram.

Jun 03, 2009 | 1986 kawasaki ZL 900 A2 Eliminator

1 Answer

1989Fzr6 3he bike/ 1995 4jh engine


does the bike have a fuel pump?what carbs are you running ?are the carbs in sync?

May 13, 2009 | 1995 Yamaha FZR 600

2 Answers

Bike wont fire. has no spark


Sounds like you have all the right new parts. I would double check the wiring. Sounds like that is where the problem is at unless the new coil is bad.

May 10, 2009 | Pit SSR 110CC Pro Beginner Bike

2 Answers

No spark


Hi and welcome to FixYa,

To my understanding, the problem is 'no spark' yet the engine cranks. Generally, to consider are:
  • pulser coil (least likely);
  • ignition coil (likely);
  • interlocks (likely);
  • CDI (most likely).

Offhand, the CDI would be the main suspect. Since the CDI is sealed, it is not possible to do component level checks. The only way to check if the CDI is good is to check the external connections; if they are good and yet no spark, then the CDI is bad.

How to check the above:
  • to check the pulser coil, measure the low voltage coming from it using an analog/needle type AC voltmeter. While cranking, it should show a flickering low voltage;
  • to check the ignition coil, use a continuity tester. Primary should measure 3 ~ 5 ohms while primary to the high voltage end would measure 15 ~ 18 kilo ohms;
  • the ignition coil has 1 terminal connected to the IGN +12 while the other terminal is connected to the CDI. This should have a pulsating voltage when cranking.
  • all the interlocks could be checked with a continuity tester. Please note that most interlocks has a diode connected in series with their wires.
The interlocks include:
  • clutch switch;
  • side stand switch;
  • neutral light switch.

Good luck and thank you for using FixYa.

Apr 21, 2009 | 1997 kawasaki ZX-6R Ninja

1 Answer

CDI help


You can't, just went through this. You'll need to find the correct CDI for your bike, some years will switch back an forth but rarely and Suzuki has never printed, that I've seen, a wiring diagram for the CDI. The 94 might work if you can find it and it should plug right in, the 98 will have a different curve that most likely wont.

Nov 20, 2008 | 1994 Suzuki GSX 1100 GR (non US...

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