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

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 Dwight Williams
      Hey everyone, I've been scratching my head over this for most of the day.  I bought a couple of Bayou 220's, got them running (they've both been sitting), and started tweaking and fixing small things.  One of them is mostly done, the other had an aftermarket carb on it and I've been trying to sort that out.
       
      Anyway, while adjusting the carb it died a few times, I restarted and moved on until it died and wouldn't restart.  I figured maybe I'd flooded it or something - after further attempts I realized I had no spark.  Since I have two identical machines I have many parts at my disposal.  I've swapped the CDI, spark plug and coil with no luck.  I have good resistance readings from the stator and pick up (135 and 110 respectively),  I don't have a peak voltage meter but I measure around 53VAC on the stator when cranking.  I have a 4 wire stator, not an alternator like the newer ones.  Grounds look good, I've checked the kill switch by verifying that it and the ignition switch grounds the black/yellow wire to the CDI.  I can turn the engine slowly and see the pickup short the meter as well, seems normal right?  So far everything I've checked looks the same on both machines.  I've got the service manual and wiring diagrams.  Do these readings make any sense?  I'm obviously missing something but I'm stumped.  thanks!
    • By Jeff Comstock
      Ok, so I had no spark issues and foundy coil was bad. Bought a caltric coil, put it on and fired right up...for bout 20 minutes then it backfired once and again, no spark. I put it on my buddies 300 and it runs.  Checked my cdi the same thing, but still no spark. Now I got my old coil and  was ohming it and got reading of .01 on primary and 11.89 from POS to plug ( meter set on 20k ) new coil reads same primary but 12.83. what gives? It tests bad but runs my buddies 300, helllllllpppp
    • By Chris2018
      I have a 1996 Kawasaki Mojave KSF250. I have no manual on it and it has a no spark issue. If anyone could give me a hand with this or would possibly have a manual would appreciate it. 
    • By orvilleortiz538
      I have a 110cc Chinese atv,the harness is in good shape,I recently bought a new stator,coil,CDI,spark plug,came as a kit from Ebay,and I still have no spark,I've watched a few videos from YouTube tried the same steps,but still no spark.... ???? Bad Flywheel??? I heard is very rare for them to go bad,(the magnets in them) I'm gonna check the harness very good again!!! I just can't get spark!!! Any suggestions Please!!!!
    • By Frank Angerano
      Not sure how many of you will remember this or give a crap about it but back in 2016 I picked up my first old atv to rebuild. Yamaha bear tracker 250. I picked it up in NJ while I was out looking for a quad for my little guy since he started this atv thing after seeing a few old pictures of me in my hay day riding. 
       
      The person I was getting the 50cc quad had this one laying around and asked if I was interested in it.  It was beat up and hadn’t ran in a few years.  No spark the guy said and he left it to sit.  I wound up taking both bikes. 
      I wish I had pics but I deleted the original post on Quadcrazy and lost the old ones on my phone when I upgraded. 
      This was the atv that caused me to stumble upon Quadcrazy since I needed a little help with the spark issue.  So needless to say I fixed it, did some cosmetic work and she was good to go. I took it upstate and used the shit out of it for just about everything under the sun. This atv made it through some deep snow, mud etc. I decided to leave it up there and use it as a back up since it’s been about 50 atv’s later and I have newer machines now. But unfortunately it sat for some time and it’s a little beat up so I brought it back home and going to clean it up. Amazing how one year sitting has done so much damage. 
      This was the first atv that I owned in over 30 years! It’s the atv that brought me here to Quadcrazy where now I endlessly check the site to see what’s going on, who’s talking about what and who can we help with there problem or can help me with mine as well as the on slot of what I do today as a hobby with atv’s. It’s been a great pass time for me and my son with the projects we have gotten and get into. He’s learned how to ride so well it scares me a little watching him. He’s learned how to fix, maintain and upgrade atv’s. He’s insanely good with carburetors as well. 
      It’s a good thing when a kid wants to play in the garage over his X Box!!
      The funny thing about this bike is that when we finished it we thought it was the best thing! We were missing a rack on the front and didn’t care since it looked ok, had no clue where to get parts or how to fix plastics. I was so new to this again since I was staring all over again and now had to remember things and also teach my son!  
      So we will be tearing into the bear tracker to get her up and running again as well as maybe a few new cosmetic changes and hang on to her for a while since I love this bike.  The last two pics are the bike the day we finished putting it all back together and when it was upstate for the first week. 
       
      Had no intention of this post going so long. 🤷🏻‍♂️







  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...