lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Gas Yamaha
Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles



Post New Thread  Reply
Thread Tools Display Modes
Unread 08-23-2010, 03:27 PM   #1
Not Yet Wild
 
kwest0425's Avatar
Yamaha
 
Join Date: Jul 2007
Location: Newark, Delaware
Posts: 33
Default Cheap G1 CDI - $20.16

Out of curiosity, I was trying to figure out what was in a G1 Cap Discharge Ignition module that was worth $200-$300. I came to the conclusion.... not much, especially for a 1-cylinder, 2-stroke like the G1. The most unique thing about the G1 engine is that it (like a few others) can run backwards. I decided to try and build my own CDI.

In doing a little more research though, I came across some very inexpensive chinese CDIs for ATVs and dirt bikes. They typically come in two flavors, a 5-pin version which gets its power from the magneto source coil and a 4-pin version which is powered by the 12v system and doesn't require a source coil input.

I ordered a 5-pin CDI and a harness which I figured could be adapted to my needs. WWW.BESTGPG.COM

The pinouts on the 5-pin differ from a 6-pin yamaha oem CDI in that there is only one pulser input on the 5-pin, while the 6-pin yamaha has two, one for forward and one for reverse.

I saw a schematic in the yamaha shop manual which seemed to indicate that the two pulser inputs were simply tied together within the CDI through a couple of diodes, so I duplicated that outside the new CDI on the harness (see attached).

Anyway, the darn thing works and performance wise I can't tell the difference between the two.

Cost to Build

Component/ Supplier/ Cost

CDI and Harness/ bestgpg.com/ $14.99
1N4004 Diodes(2)/ Radio Shack/ 0.99
PC Board/ Radio Shack/ 1.99 - not really required
Snap Connectors/ Radio Shack/ 2.19

Total Cost $20.16

kwest
Attached Images
File Type: jpg IMG_0893_Labeled_3.JPG (124.5 KB, 244 views)
File Type: jpg IMG_0894_Labeled_3.JPG (122.9 KB, 242 views)
File Type: jpg IMG_0899_Labeled_3.JPG (126.9 KB, 262 views)
File Type: jpg IMG_0902Labeled_3.JPG (140.9 KB, 247 views)
File Type: jpg IMG_0904_3.jpg (101.6 KB, 269 views)
kwest0425 is offline   Reply With Quote
Alt Today
BGW

Golf car forum Sponsored Links

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum
   
Unread 08-23-2010, 05:23 PM   #2
nimda
Club Car
 
Join Date: Jun 2007
Posts: 12,936
Default Re: Cheap G1 CDI - $20.16

Sticky worthy. Thanks
roady89 is offline   Reply With Quote
Unread 08-23-2010, 06:03 PM   #3
Not Yet Wild
Yamaha
 
Join Date: Aug 2010
Location: Texas
Posts: 59
Default Re: Cheap G1 CDI - $20.16

Excellent info, I was wondering if these cheaper versions could be adapted as well,
but my electrical knowledge isn't on the highest level.
I know only the basic stuff, enough to get by most of the time.
Rosati is offline   Reply With Quote
Unread 09-16-2010, 08:10 PM   #4
Vegas modded 420
 
sho305's Avatar
Yamaha
 
Join Date: Jun 2009
Location: West MI
Posts: 14,754
Default Re: Cheap G1 CDI - $20.16

If you dig around some of the Chinese motorcycles are yamaha copies but think they are all 4 strokes....if that matters, not sure on the scooters but some are 2 stoke. However you can get adjustable CDI for some of them but they cost more, then you can play with the timing advance curve.

Great post BTW!
sho305 is offline   Reply With Quote
Unread 09-17-2010, 02:20 PM   #5
Not Yet Wild
 
kwest0425's Avatar
Yamaha
 
Join Date: Jul 2007
Location: Newark, Delaware
Posts: 33
Default Re: Cheap G1 CDI - $20.16

Yeh, I thought about getting one with adjustable timing but I wasn't sure this was going to work so I went cheap. Interesting experiment though. I wonder what that would do to the 2-stroke performance?

-kwest
kwest0425 is offline   Reply With Quote
Unread 09-17-2010, 02:57 PM   #6
Vegas modded 420
 
sho305's Avatar
Yamaha
 
Join Date: Jun 2009
Location: West MI
Posts: 14,754
Default Re: Cheap G1 CDI - $20.16

It made the one I had go faster, I advanced the plate under the flywheel but then it went slower in reverse. With the CDI that would not be an issue. I can't believe that place has the CDI for $5 though, wow what a deal. I think it was over $40 at a similar place was the cheapest adjustable one I could find. It does not make a huge difference though, but I ran mine down the road and open areas on stock tires, so it really ran the rpms all the time and that is where the advance seems to help more.
sho305 is offline   Reply With Quote
Unread 10-12-2010, 05:25 PM   #7
Not Yet Wild
 
Join Date: Oct 2010
Posts: 4
Default Re: Cheap G1 CDI - $20.16

can I use this for the ig module on a G9?
harley165 is offline   Reply With Quote
Unread 10-13-2010, 09:16 AM   #8
Vegas modded 420
 
sho305's Avatar
Yamaha
 
Join Date: Jun 2009
Location: West MI
Posts: 14,754
Default Re: Cheap G1 CDI - $20.16

Quote:
Originally Posted by harley165 View Post
can I use this for the ig module on a G9?
It should be possible but who knows. Would have to figure out wiring, the G9 ignitor is about the same thing as a CDI and does advance the timing/etc., and they are dang expensive.
sho305 is offline   Reply With Quote
Unread 10-26-2010, 07:49 PM   #9
Not Yet Wild
Mixed Breed
 
Join Date: Oct 2010
Location: Manning, sc
Posts: 1
Default Re: Cheap G1 CDI - $20.16

Dude flat out awesome! Im glad im apart of this great forum! I did this same replacement / upgrade. Bought a upgrade cdi from ebay for a 50cc to 250cc motor. Took a look at your pinouts and BAM. Less than20 dollars I have a better and quicker running cart! Thank you sir.
Erik


Quote:
Originally Posted by kwest0425 View Post
Out of curiosity, I was trying to figure out what was in a G1




Cap Discharge Ignition module that was worth $200-$300. I came to the conclusion.... not much, especially for a 1-cylinder, 2-stroke like the G1. The most unique thing about the G1 engine is that it (like a few others) can run backwards. I decided to try and build my own CDI.

In doing a little more research though, I came across some very inexpensive chinese CDIs for ATVs and dirt bikes. They typically come in two flavors, a 5-pin version which gets its power from the magneto source coil and a 4-pin version which is powered by the 12v system and doesn't require a source coil input.

I ordered a 5-pin CDI and a harness which I figured could be adapted to my needs. WWW.BESTGPG.COM

The pinouts on the 5-pin differ from a 6-pin yamaha oem CDI in that there is only one pulser input on the 5-pin, while the 6-pin yamaha has two, one for forward and one for reverse.

I saw a schematic in the yamaha shop manual which seemed to indicate that the two pulser inputs were simply tied together within the CDI through a couple of diodes, so I duplicated that outside the new CDI on the harness (see attached).

Anyway, the darn thing works and performance wise I can't tell the difference between the two.

Cost to Build

Component/ Supplier/ Cost

CDI and Harness/ bestgpg.com/ $14.99
1N4004 Diodes(2)/ Radio Shack/ 0.99
PC Board/ Radio Shack/ 1.99 - not really required
Snap Connectors/ Radio Shack/ 2.19

Total Cost $20.16

kwest
Eriksg1 is offline   Reply With Quote
Unread 03-26-2011, 09:21 AM   #10
Getting Wild
 
henryfudaley's Avatar
Yamaha
 
Join Date: Mar 2011
Location: New Paris,Ohio
Posts: 84
Default Re: Cheap G1 CDI - $20.16

So all i need to do is order those parts you posted and assemble thats it. Ill have a new cdi unit.
henryfudaley is offline   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Gas Yamaha


Thread Tools
Display Modes


Similar Threads
Thread Forum
G16 Parts, Cheap Gas Yamaha
Cheap Chargers Electric EZGO
G1 Cheap, Should I buy it? Electric Yamaha
Another cheap mod Design Center
any cheap speed for 97 dcs 36v? Electric EZGO


All times are GMT -5. The time now is 01:33 PM.


Club Car Electric | EZGO Electric | Lifted Golf Carts | Gas EZGO | Used Golf Carts and Parts

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.