Honda ATV Forum
Go Back   Honda ATV Forum > Honda ATV Technical Discussions > Repair & Maintenance

Repair & Maintenance Having problems? Doing a rebuild? All Repair/Maintenance Discussions here.

Reply
 
LinkBack Thread Tools Display Modes
Old 04-18-2010, 07:31 PM   #1 (permalink)
Junior Member
 
gatorguy's Avatar
 
Member #2868
Join Date: Apr 2010
View gatorguy's Photo Gallery(0)
Posts: 4
87 fourtrax 70 no spark

Picked up a fourtrax 70 for the kids yesterday. Needless to say they are more than anxious to get going but no spark. I cleaned up all the grounds and checked and cleaned connections. The grounds and kill switch seems to funtion ok. Key was eliminated wires are just connected together. How can I tell if there is power to the coil? What would be the first place to start on this problem cdi, stator, pulse generator? I pulled the side cover but didn't have a flywheel tool so thats still on there. It was suprising clean inside no rust. So are the aftermarket coils and CDIs for sale on EBAY junk or will they work.
gatorguy is offline   Reply With Quote
HondaATVForums.net is the premier Honda ATV Forum on the internet. Registered Users do not see these ads, so Register - It's Free!
Old 04-18-2010, 08:08 PM   #2 (permalink)
Super Moderator
Supporting Member
 
TRX2fiveO's Avatar
 
Member #417
Join Date: Jun 2009
Location: East coast North Carolina
View TRX2fiveO's Photo Gallery(0)
Posts: 15,540
Liked: 12 times
I ran into this problem a couple of months ago with the same quad model and year.. First of all I relocated the groung from the bottom air cleaner housing bolt to the frame. I sanded all the paint from the area and connected it there. I then unplugged the CDI cleaned the contacts as best i could and coated them with Die-electric grease I reinstalled them and I had fire. I would clean all your connections again....

Welcome to the forums
__________________
"MOOSE WAGON "
91 TRX250X
96 Polaris 400L sport (Mrs. Moose Ride)
07 Suzuki LTZ250 (Sons)
00 TRX350TM 4X2
04 TRX250EX (TLC Needed)
74' CB360 (future FrankenQuad)
Work in progress
http://www.hondaatvforums.net/forums...nstruction.htm

http://www.hondaatvforums.net/forums...e-2-hicks.html
TRX2fiveO is offline   Reply With Quote
Old 04-18-2010, 09:05 PM   #3 (permalink)
Super Moderator
Supporting Member
 
mud99's Avatar
 
Member #988
Join Date: Oct 2009
Location: Not far from Moose
View mud99's Photo Gallery(0)
Posts: 7,614
Welcome to the forums.
__________________
www.bbnradio.org
My life got better the day I got saved.
Our rides
1995 Wrangler
2004 Ford Explorer
2004 Recon 250
2009 Troy Built Lawn Tractor
and a 110 Pink Panther
www.trxforums.com
mud99 is offline   Reply With Quote
Old 04-18-2010, 09:07 PM   #4 (permalink)
Super Moderator
Supporting Member
 
Helmut's Avatar
 
Member #948
Join Date: Oct 2009
View Helmut's Photo Gallery(0)
Posts: 23,815
Liked: 4 times
Welcome to the forums.
__________________
Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
Helmut is offline   Reply With Quote
Old 04-19-2010, 07:38 AM   #5 (permalink)
Junior Member
 
3dcycle's Avatar
 
Member #2866
Join Date: Apr 2010
View 3dcycle's Photo Gallery(0)
Posts: 8
there is a static test that you do pretty quick on the IG coil as well. if you have a multi meter, set it to ohms and check resistance from spark plug end (secondary side) to primary side should have about 7-10k ohms with no cap and around 14kohms with spark plug cap. and then check between 2 primary post, (if it has 2) should be about.5 or so
3dcycle is offline   Reply With Quote
Old 04-20-2010, 06:47 PM   #6 (permalink)
Junior Member
 
gatorguy's Avatar
 
Member #2868
Join Date: Apr 2010
View gatorguy's Photo Gallery(0)
Posts: 4
Still no fire

Thanks for the help. I tried relocating ground. Checked continuity on all wires. Re-cleaned connections, checked coil it ohmed good and also tried coil from another machine. Some of the black wrap around the copper on one side of the stator looks like it may have got hot? Also, cleaned everythign up in side the LH side case. Still no fire. Is there an ohm test for the stator? I just tested across the ends of each side and had almost no resistance. How do you do it? I found something that said to check pulse generator by b/y wire and frame ground. I did that and it was @95 is that acceptable what i saw said it should be in the 200-300 range. I would think less is better right? Am I down to the cdi? I have a friend with a 87trx125 will the cdi work off that it has a different p/n that mine. Is that something to do with having a battery? Will it work just to see if I get spark before I drop $130 on a new one.

Last edited by gatorguy; 04-20-2010 at 06:50 PM. Reason: added to it
gatorguy is offline   Reply With Quote
Old 04-26-2010, 07:48 PM   #7 (permalink)
Junior Member
 
gatorguy's Avatar
 
Member #2868
Join Date: Apr 2010
View gatorguy's Photo Gallery(0)
Posts: 4
70 runs like a champ now. Bad coil and also the DA I bought it from had the wires for the key switch tied together. Honda key is off when grounded so didn't work so good like that. Pretty obvious once I had a wiring diagram.
gatorguy is offline   Reply With Quote
Old 02-08-2013, 03:07 PM   #8 (permalink)
Junior Member
 
TJeff's Avatar
 
Member #28529
Join Date: Feb 2013
View TJeff's Photo Gallery(0)
Posts: 2
Hi, just read your post and I have the same thing with no spark and the previous owner took the key slot out.
So... Should I twist the 2 wires from the key together? or not?

Thanks
Jeff
TJeff is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Honda ATV Forum > Honda ATV Technical Discussions > Repair & Maintenance


Search tags for this page

1986 honda 70 fourtrax

,
1986 honda fourtrax 70 electricial system
,

1986 honda fourtrax 70 no spark

,
87 honda fourtrax 70 no spark
,
87 trx70 no spark
,
fourtrax 70 cdi
,
honda 70 not firing
,

honda fourtrax 70

,
honda fourtrax 70 no spark
,

honda trx 70 no spark

,
honda trx 70 not firing
,

trx 70 no spark

Click on a term to search our sites for related topics.

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


» Discount Tire
Motosport.com


Powered by vBadvanced CMPS v3.2.1
All times are GMT -6. The time now is 07:33 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.