New project And Im In A Hole

Discussion in 'The Garage' started by thoughtless150, Oct 7, 2017.

  1. Beezer

    Beezer Long timer

    Joined:
    Oct 26, 2004
    Oddometer:
    7,739
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    Anchorage, formerly Spenard (hub of the universe)
    heres what I found:
    XL600R
    Lighting coil 0.4 to 0.55 ohms
    Charging coil 0.95 to 1.29 ohms
    Exciter coil 230 to 320 ohms

    the lighting coil is always very low ohm, that's part of how it produces high current. very hard to read accurately without a special meter. you meter's leads can have a couple ohms. put the leads together and see what they read on your lowest scale/ I like to shake them after things stabilize & see that the reading stays steady. if the leads make the reading jump around they are no good. easier to test the voltage when its running, but you can still ohm check to see that the coil is not open and not grounded to the case (and not a ridiculous number).

    the charging coil is kinda the same thing... low ohm and same testing problems, ohm it the same way. they usually give you a voltage to check for when you kick it over, but I can't find it. it will be AC, check for "some"... guessing it should hit at least 40-50VAC and probably more. anyway, this is the coil that powers the whole ignition system

    the exciter coil is sometimes called the trigger coil. it sends a signal to the CDI so it knows when to fire


    now for the coil & spark plug wire:
    XR600R
    Primary resistance 0.1 to 0.3 ohms
    Secondary resistance
    1985 through 1987 (with plug cap connected) 7400 to 11,000 ohms

    I saw a chart from the manual... definitely made with an analog meter. the coil readings will be the same with a digital but most of the readings on the CDI itself will be off unless you use an analog to measure

    fwiw... I've seen other manuals say words to the effect that the CDI can not be checked & to test by replacing with a known good unit
    #41
    thoughtless150 and shinyribs like this.
  2. mcma111

    mcma111 Long timer

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    San Francisco,Ca.
    1/4 " not 3/4 "
    #42
  3. thoughtless150

    thoughtless150 Adventurer

    Joined:
    Oct 7, 2017
    Oddometer:
    21
    Location:
    Lebec

    thanks for the detailed response. im trying to find out which pins are responsible for what on the stator wires. i know green is commonly ground. and the black/red is the output for the ignition i thought. I was trying to test the vac from the black/red wire and ground while kicking it over but i would see any where from 15-20 vac. But im not sure if im even reading from the correct wires. that you're saying should be reading 40-50 vac.
    #43
  4. Beezer

    Beezer Long timer

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    Anchorage, formerly Spenard (hub of the universe)
    40-50VAC is a number I pulled outta my ass... just a guess. someone will know a true number... try over at Thumper Talk.
    https://thumpertalk.com/forums/forum/4-honda/

    if you don't have a manual you should get one. I bookmark sites that post diagrams but your bike is hard to find.... don't know why for such a common bike. anyway, heres links to diagrams I did find. one is the wrong year but the subject was adapting later CDI to older bike... don't know if they help

    http://photobucket.com/gallery/user/Weatherillpdx/media/bWVkaWFJZDozNzY0MzY1OQ==/?ref=

    http://www.classiccycles.org/media//DIR_1653304/DIR_1657704/5a83a49ceff08d37ffff868affffe41e.pdf
    #44
  5. thoughtless150

    thoughtless150 Adventurer

    Joined:
    Oct 7, 2017
    Oddometer:
    21
    Location:
    Lebec

    I appreciate it either way. anything helps. I did manage to spend some time tuning the low speed on the carb and got it to start about on the third kick with the choke all the way. but you gotta kick fast. Revs great but idles rough. Maybe its just not producing enough voltage to spark the plug at idle. Im just hoping i don't have to pull the whole motor just to check if the dam cam is off a tooth.
    #45
  6. JCool

    JCool Long timer

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    Oct 15, 2016
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    3,033
    If the cam chain jumped it would retard the cam timing and the bike would only run better. I'm pretty sure that's not your problem. I'd say the stock CDI is dead and that's why the bike has another. The motor has to come out to remove the rocker box , for future reference. There IS an XL600 thread in the Thumpers section here , you'd do better to post there.
    #46
  7. thoughtless150

    thoughtless150 Adventurer

    Joined:
    Oct 7, 2017
    Oddometer:
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    Okay so i decided to go for it. i pulled the motor out and pulled the valve cover, made sure it was on on the timing mark and the cam marks are perfect. I confirmed with the previous owner and he said he was very specific about how he made sure after XR's did the head work that he spent extra time on making sure the marks were on point which they still are. So i sealed it back up.

    However when i was prepping the engine to freshen it up with a coat of paint i noticed the ground wire that comes from the stator and bolts to the block was half sheered off from being pinched between one of the bolts that screws the stator cover to the case.

    Attached Files:

    #47