Bare bones wiring to get the bike to run

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Before I run the entire wiring harness(I’ve got two engines and a couple top ends each), is there a simple two or three wire harness I can wire up that will do the job just to tune and see what, and how I want to set this thing up?

Re: Bare bones wiring to get the bike to run

u just need spark, and.... maybe a throttle.

Re: Bare bones wiring to get the bike to run

So hook up a coil and the little cdi black box and fire away?

Re: Bare bones wiring to get the bike to run

take a peek at the wiring diagram.

Re: Bare bones wiring to get the bike to run

Jack Rutherford /

Black/red from stator to cdi. Orange from cdi to coil. Coil to spark plug. Then you may or may not need to ground black stator wire. And you will need to ground coil but that is normally grounded through its metal bracket on engine.

Re: Bare bones wiring to get the bike to run

> Jack Rutherford Wrote:

> -------------------------------------------------------

> Black/red from stator to cdi. Orange from cdi to coil. Coil to spark

> plug. Then you may or may not need to ground black stator wire. And you

> will need to ground coil but that is normally grounded through its metal

> bracket on engine.

Thank you! Let’s see if this damn thing runs or not!

Re: Bare bones wiring to get the bike to run

No spark. Somethings wrong.

Re: Bare bones wiring to get the bike to run

I’m losing it may be time to take some time off.

Until then, if anyone thinks of anything let me know. I shouldn’t need a battery to fire this one off.

Re: Bare bones wiring to get the bike to run

Aright. Question. Engines mostly aluminum. Frames off the bike. There’s no battery, is there anything that’s actually a true ground?

Re: Bare bones wiring to get the bike to run

Cdi ,HT coil etc must be grounded to case.. check wiring and see if backside of ignition coil also needs to be grounded. Not sure what bike is you are wrenching. Post it's wiring diagram

Re: Bare bones wiring to get the bike to run

Jack Rutherford /

wiring diagram qt50

cdi must be grounded too (edited)

Re: Bare bones wiring to get the bike to run

> Jack Rutherford Wrote:

> -------------------------------------------------------

> wiring diagram qt50

>

> cdi must be grounded too

I will try this again after dinner.

Re: Bare bones wiring to get the bike to run

Nothing

Re: Bare bones wiring to get the bike to run

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Is this the CDI? I only ask because I’m beginning to loose my mind

Re: Bare bones wiring to get the bike to run

Kinda looks like it .

Re: Bare bones wiring to get the bike to run

We got spark!!!

Re: Bare bones wiring to get the bike to run

> Geoffrey C Wrote:

> -------------------------------------------------------

> We got spark!!!

How ?

Re: Bare bones wiring to get the bike to run

You know, I’m real good with wiring usually but I enjoy nice clean part, a solder gun, fittings and connectors and this has been a pain in my ass.

By the way the brass tube coming off the petcock broke so I filed it smooth and open. At this point I can probably just run on reserve at al times and be ok heh?

Re: Bare bones wiring to get the bike to run

> P D Wrote:

> -------------------------------------------------------

> > Geoffrey C Wrote:

>

> > -------------------------------------------------------

>

> > We got spark!!!

>

> How ?

And sure , you can run a straight fuel draw .

Re: Bare bones wiring to get the bike to run

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So while throwing a little fit and wondering if what I knew was the CDI was the CDI, there was a reason for this and it surfaced today. I’m going through my parts and this little jewel shows up.

ES Control it says on top. I bet this is to aid starting. Do I need this? I don’t like it, seems complex. Anyone qualified to explain to me why I’m wrong and need this or want this please chime in.

Thanks again to all

Re: Bare bones wiring to get the bike to run

Jack Rutherford /

You shouldn’t need the control box to start it. In fact, I’ve removed the control box on other qts and they start fine.

In going to rig up an engine for bench testing. In fact, I’ve got 3 of them to test and I don’t feel like swapping the qt ripper off the bike. I’ll let you know.

Re: Bare bones wiring to get the bike to run

Let me know, thanks. I think I’m going to go on and rig up a “Tuning harness”.

Re: Bare bones wiring to get the bike to run

Aright. I got spark. I put the EBay carb on, didn’t hook throttle or choke up. Will not start.

Re: Bare bones wiring to get the bike to run

> Geoffrey C Wrote:

> -------------------------------------------------------

> Aright. I got spark. I put the EBay carb on, didn’t hook throttle or

> choke up. Will not start.

Why not hook up throttle and choke? Easy enough.

Re: Bare bones wiring to get the bike to run

Well, that’s it, it runs and runs I think well.

Re: Bare bones wiring to get the bike to run

Jack Rutherford /

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