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  #1  
Old 03-19-2011, 08:16 PM
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Default yerf dog 90cc wiring

I bought one on craigslist. It's missing the ignition cylinder, cdi and the coil is damaged. It sat under someone's porch for a couple of years.

Ive looked on ebay and there are no parts for it. Can I interchange any cdi, coil from another china quad? Also does anyone have a wiring diagram for it?

Also is disabling the oil injection as simple as blocking off the oil tube going to the carb?

Thanks
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  #2  
Old 03-19-2011, 10:34 PM
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It's easy to wire cdi from other China quad see this thread

http://m.atvconnection.com/showthread.php?t=335129

I've got a monsoon 90 same thing! That thread has a link to wiring diagram and full parts list and breakdown diagrams. Also how I wired generic cdi in.
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  #3  
Old 03-20-2011, 10:40 AM
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After a few weeks of searching and asking questions ive found the following links to be useful.


http://forums.atvconnection.com/2915057-post8.html (wiring diagram acurate for monsoon/yerfdog)

http://www.bmikarts.com/PDF/23000.pdf (exploded views and parts list)

90cc yerf dog atv (parts)

90cc Engine Parts : BMI Karts & Supplies : Go Karts Parts : Racing Go Kart Parts : GoKarts : Versailles, Ohio : USA : Indoor Track : Tips (more parts)


These quads are kinda oddball but parts are out there. The engine is the same as a 90cc Yamaha jog. And it was also used on a polaris youth model.




This is how to wire in a generic 5-pin china CDI and coil:



Click the image to open in full size.


Using the above picture i wired the cdi to the stator harness as follows

(on atv) Black with Red stripe / AC Power (on cdi)

(on atv) White with red stripe / Trigger (on cdi)

(on atv) Ground / Ground (on cdi)

(on atv) Orange / Coil (on cdi) (here i reused the mounting point and wire running to the factory coil (orange wire)

I then wired a toggle switch from ground to the kill switch prong on cdi to turn the quad off.


This is the CDI module i used:

CDI Box, One Plug, 5 Pins for 50-110cc ATV, China Parts - eBay (item 160553654283 end time Mar-08-11 21:36:32 PST)


This is the coil i used:

Ignition Coil China ATV Dirt 50cc 70cc 90cc 110cc 125cc - eBay (item 190463975877 end time Apr-01-11 20:55:03 PDT)


Hopfuly this will save you some time and get youre quad running!
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  #4  
Old 03-21-2011, 11:33 PM
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Quote:
Originally Posted by jacob_royer View Post
It's easy to wire cdi from other China quad see this thread

Monsoon 90cc atv - ATVConnection.com ATV Enthusiast Community

I've got a monsoon 90 same thing! That thread has a link to wiring diagram and full parts list and breakdown diagrams. Also how I wired generic cdi in.
The above link is corrupted. To allow people coming in by search engines down the road, this is correct link referred to above:

Monsoon 90cc atv

which is continued here...

Monsoon/Yerfdog 90cc bogs down
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  #5  
Old 03-30-2011, 11:51 AM
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lol that link is for mobile devices. luckily I was on my phone

Wow you guys are helpful. I didnt check the thread(should have) I ordered the 6pin cdi but it has 2 grounds so its really only 5. tracking says the coil should come today. I'm going to have to make half of the wiring myself, but the diagram should help. Only question:
how do I wire up the electric choke? Is it just wired to be on when ignition is on?

This is the coil I got. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=180609439955&ssPageNam e=STRK:MEWNX:IT
and the generic 2 white plug cdi
I need an AC cdi right? (bit to late to ask lol)
Click the image to open in full size.
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  #6  
Old 03-30-2011, 12:11 PM
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Make absolute sure you're cdi is for a 2/stroke
! A 4 stroke cdi will idle but won't rev up right. Search eBay for "jog cdi" you can get a high performance unit for $20 shipped and the generic China coil will work with it.
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  #7  
Old 03-30-2011, 12:16 PM
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Quote:
Originally Posted by jacob_royer View Post
Make absolute sure you're cdi is for a 2/stroke
! A 4 stroke cdi will idle but won't rev up right. Search eBay for "jog cdi" you can get a high performance unit for $20 shipped and the generic China coil will work with it.
This is the cdi. Guess I'll need to order a new one
GY6 CDI box 150CC 200CC 250CC 300 ATV MOPED SCOOTER NST - eBay (item 120699622244 end time Mar-27-11 17:50:09 PDT)

so the 5 wire green plug cdi is a 2 stroke cdi?
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  #8  
Old 03-30-2011, 03:34 PM
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http://item.mobileweb.ebay.com/viewi...id=86369449657

This is one I bought works great! The 5 pin style will not rev up on these engines
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  #9  
Old 03-30-2011, 04:59 PM
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Default

Quote:
Originally Posted by jacob_royer View Post
After a few weeks of searching and asking questions ive found the following links to be useful.


http://forums.atvconnection.com/2915057-post8.html (wiring diagram acurate for monsoon/yerfdog)

http://www.bmikarts.com/PDF/23000.pdf (exploded views and parts list)

90cc yerf dog atv (parts)

90cc Engine Parts : BMI Karts & Supplies : Go Karts Parts : Racing Go Kart Parts : GoKarts : Versailles, Ohio : USA : Indoor Track : Tips (more parts)


These quads are kinda oddball but parts are out there. The engine is the same as a 90cc Yamaha jog. And it was also used on a polaris youth model.




This is how to wire in a generic 5-pin china CDI and coil:



Click the image to open in full size.


Using the above picture i wired the cdi to the stator harness as follows

(on atv) Black with Red stripe / AC Power (on cdi)

(on atv) White with red stripe / Trigger (on cdi)

(on atv) Ground / Ground (on cdi)

(on atv) Orange / Coil (on cdi) (here i reused the mounting point and wire running to the factory coil (orange wire)

I then wired a toggle switch from ground to the kill switch prong on cdi to turn the quad off.


This is the CDI module i used:

CDI Box, One Plug, 5 Pins for 50-110cc ATV, China Parts - eBay (item 160553654283 end time Mar-08-11 21:36:32 PST)


This is the coil i used:

Ignition Coil China ATV Dirt 50cc 70cc 90cc 110cc 125cc - eBay (item 190463975877 end time Apr-01-11 20:55:03 PDT)


Hopfuly this will save you some time and get youre quad running!
You used that cdi and it worked fine?
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  #10  
Old 03-30-2011, 11:10 PM
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Quote:
Originally Posted by ed1380 View Post
You used that cdi and it worked fine?
You need to read further down the thread where we found out that that CDI will *not* work. That 5 pin CDI is a four stroke CDI and will not work on a 2 stroke. It starts up and idles, but will not rev up. You need to buy a 2 stroke CDI like the one in Jacob_royers's link.

The ignition timing is way different for a two stroke versus a 4 stroke.

BTW, the 2 connector 6 pin CDI you bought is the same internally as the 5 pin CDI above except for the connectors.
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Old 03-30-2011, 11:10 PM
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90, 90cc, atv, diagram, dog, dogs, kill, parts, pictures, problems, switches, wire, wiring, yerf, yurf



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