Quantcast
Jump to content

  • Join Today, It's Simple and FREE!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

crf250r

trx 300 4x4 reverse light on

Recommended Posts

good day everyone, 

                  new to this page. I need help with my 1994 fourtrax 300 4x4. the bike stop sparking for some odd reason so no big deal I order a new ignition coil, that was not it so I order a new cdi box. now I get sparks. by now the battery is low from cranking so much, so I boost it with the truck. the bike as the hardest time to start and when it does it runs rough, bogging, backfire,..., reverse light is on even if im not in reverse but in neutral. and the reverse light gets briter as I rev the bike.i clean the carb twice, remove the reverse sensor and check the ohm, reading 0.0 to 0.9. any idea, I need to get this bike going asap. thanks for your time

Share this post


Link to post
Share on other sites


The reverse light switch (sensor) should read 0 ohms  or close to  it when  it   is  closed to  indicate the machine is in reverse.  The lights brightening  as you rev up the motor  is normal  as  the  voltage  rises  as the  motor  revs  faster . Check the voltage at the battery  when the  motor  is running It  should be  about  12.5  at idle and rising to a maximum of  between  13.5 and 14.2v . If  it  is  low  it could also  be  the source  of the rough running , although  the  rough running, bogging  and  backfire is usually  from the motor running  lean.  It  could be   from  a missed plugged passage  or just the  idle  air  mixture  out of adjustment.  Check  for  leakage of the  high tension wire to the spark  plug  and  try  a new  plug too as the spark plug  could be intermittent .

Share this post


Link to post
Share on other sites
Guest

Where did you get the CDI box? I ran into this with a customers bike (more than one actually) which he replaced the CDI box with a cheap one from one of the big internet sites. I replaced the CDI with our "known good shop box" and the trouble was gone. The last bike i ran into this with was a TRX200D i think. I usually replace CDIs with stock Honda, or one from Ricks Motorsport Electrics,about the only ones i trust. I'd direct you to my website but i'm putting together a brand new one at the moment.     www.mettlers.biz in case your interested. As davefrombc stated above,rule out the reverse switch to be sure.

Share this post


Link to post
Share on other sites

Thanks for your help guys, so yesterday i tryed pretty much everything under the sun to get this bike going, finally i contacted my mechanic and that’s exactly what he told me about the cdi box, he said don’t expect much from a cdi box at 20$. So ill order a new one from Honda and ill keep you posted. Thanks again.

Share this post


Link to post
Share on other sites

Ok so i got a new cdi and coil from honda. Try them on and still no spark.... one thing the battery is dead but i boost with my truck to get the bike going, so lots of power to the battery there. What else should i be looking at. Thanks for your time guys

Share this post


Link to post
Share on other sites


Start to look at the wire harness for any loose or broken wires.  Kill switch may have an issue.   If not there then the stator coil or secondary coil.   

If you know how to use a tester you can eliminate those parts to avoid buying them. 

Share this post


Link to post
Share on other sites
21 hours ago, crf250r said:

Ok so i got a new cdi and coil from honda. Try them on and still no spark.... one thing the battery is dead but i boost with my truck to get the bike going, so lots of power to the battery there. What else should i be looking at. Thanks for your time guys

Sounds like the regulator/rectifier is bad.  That will cause a no spark issue on those old 300's.  I'd get a new battery also.  Not a good idea to jump it with your truck ESPECIALLY a running truck.  Too many amps will reek havoc with the cdi and regulator.

Share this post


Link to post
Share on other sites

It can also fry the stator coil.   

Edited by Frank Angerano

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Topics

    • By BuckBilly
      Good morning to all !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
      Let's see if we can make this a daily event.
    • By wrench66
      Hi all,
      I recently acquired an old Bayou from a neighbor that I cleaned up a got running, then from nowhere a problem crops up where it refuses to start........ I pull the plug and it has no spark, pulled the plug cap off and laid the bare wire on the exhaust header and still nothing......once in a while though when I push the starter button but as I let off the button it might spark once. Now it did begin sparking normally just once and I plugged everything back in and it ran normally again until I turned the engine off. Next time I tried starting it we were back to no spark or the one spark deal.
      I have tested the stator wires at 140 ohm, the pick up at 130 ohm (I can't seem to find a reliable number for these values online), I bought a new ignition coil and ignition switch on chance those may have been the problem but were not, not sure where to look from here......... does the starter relay switch have anything to do with the ignition on these? I know these older Bayou's are magneto type ignitions and do not need battery power to operate but I wonder if there are safety switches involved I may not be aware of. Also, can someone point me to a good wiring schematic for the magneto 220's? Pre 95 I believe.
      thanks for any help!
      -- Ray
    • By Jcolgin
      I have a 1998 Big bear 350...the tail pipe/spark arrestor is broke in the exhaust....how can I get it out to replace it? And what's the best way to get the new one in?
    • By cfherrman
      Fixing for a friend. Atv was at a different friends house to be fixed and he rebuilt the carb and had it running nice, then it shut off and no more. He replaced the key and the coil.
       
      So he got busy, so I am helping, I checked the wiring from the stator to the cdi, and from the cdi to the coil. All is good. I checked resistance on the pickup coil, good, and on the source coil, open. I buy a new stator (China) and the 4 prong plug only has 3 wires in it while mine has all 4. I checked resistance in the source coil and it's in the 300's. I pulled one of the old pickup wires out of the old stator and wire it in the new one. Still no spark.
       
      Why do the wires differ, I checked the VIN again and it's "J" for the year and I got a 1988 stator. Please help!
    • By JacobSlabach
      So my parents have not let me get my license yet and I need to get around to gets parts and stuff.  Answer: Yamaha CW50 scooter.  This is a 2-cycle self-mixing scooter that so far, I am really surprised with the power output and speed.  It reaches about 45mph since the speedo has been disconnected and has plenty of power for two riders.  Its stupid looking, but with some work and a title and plate, it'll take me around town..  My issue is this:  No key.  I bought it for $150 from a friend and he bought it from someone for $100 who wired in a switch in place of the ignition.  That guy got it form his neighbor who's renter left it behind.  The scooter will run with this switch on or off (kill switch on handlebar kills engine)  To get it tiled and a plate so its road worthy, I need to get the ignition working either by a replacement key or a new ignition.  All wires are cut to the ignition and the switch turned on the power to the signal light switch.  Also, the 2-cycle oil was leaking out the carb, through the air filter and onto the scooter.  also, it runs great, but its making blue smoke with throttle and the muffler is wet with oil.

      (I have new signal lights for it btw)  So the issues I have with it summed up:
      No key (need new ignition) smokes burnt out headlight-  can I replace them with LEDs?
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...