JDR bike build

[Ivan]

Never bothered trying to get a CDI setup to work. Total loss I ran the points off the end of the cam, coil from supercheap and added a switch to prevent the battery getting drained and the coil getting fried, also threw in two LEDs, one for power on to make it obvious and one for a neutral light because the wife likes having them.

I want to try stay clear of total loss for that exact reason if I forget to charge battery or someone else plays and turns the switch on and frys the coil I want to wireit up so I can justpush it in gear and start it, how come you cant do this with a points setup? sorry ive had no experience with points but keep reading all over the net points bikes need a battery to run?

[Henk]

You can do it with a points set up. The XR100 I bought as an engine donor has a points system and no battery, I guess it all comes down to how the stator is wired up. My first bucket was push and go with a points system, it was a Honda 125 one piece head engine mashed up from various bikes, I have no idea how it was wired though as I bought it, ran it for a couple of months and then went over to the dark side and bought an FXR. Suspect that if you dug through the wiring diagrams it would be possible to work it out, or track down one of the guys that used to run these engines back when they were common.
To be honest I'm not 100% sure that it ran points now. Never really spent much time dicking about with it, got bored with falling off the bicycle tyres before then.

[Ivan]

fuck it im going to run points for now then get my auto lectrical mate when hes over here to help me out,

[Henk]

If you go total loss you should have something up and running in no time, be aware that the coil and condenser you have a re likely for a six volt system so you might have to junk them and fit something a little later model.

[Ivan]

nah I have a cdi coil off a late model xr200

[husaberg]

nah I have a cdi coil off a late model xr200

CDI coil is no good with points sorry. Learnt that the hard way myself.

[Ivan]

my mate reckons he can wire it so it runs the points still and then the points trigger the cdi instead of pulse coil would be pretty cool way of doing it,


Were do you get a points coil from these days otherwise?

[Henk]

Repco or supercheap. I have a car coil running in the XL100 F5 bike and have seen something similar on a bike at Roys Hill.

[husaberg]

my mate reckons he can wire it so it runs the points still and then the points trigger the cdi instead of pulse coil would be pretty cool way of doing it,


Were do you get a points coil from these days otherwise?

do you mean you have a CD! Stator or more likely that he will wire it that the pulse coil triggers the non cdi magneto ignition?
cause it could be wired as a ET ignition without the cdi pulse trigger if you wanted.

[Ivan]

do you mean you have a CD! Stator or more likely that he will wire it that the pulse coil triggers the non cdi magneto ignition?
cause it could be wired as a ET ignition without the pulse coil if you wanted.

nah he said he could probably wire it so it runs the points stator and flywheel all the wayup to the points and insteadof using a pulse coil to trigger to send the signal to the cdi you use the points to send the points break as a trigger for the cdi and then run a cdi and cdi coil


what is a ET ignition?

[husaberg]

nah he said he could probably wire it so it runs the points stator and flywheel all the wayup to the points and insteadof using a pulse coil to trigger to send the signal to the cdi you use the points to send the points break as a trigger for the cdi and then run a cdi and cdi coil


what is a ET ignition?

Energy transfer old bsa and triumph comp bikes used to use it.

[Ivan]

what differenceis running points over a cdi going to make??? what is points float?

[husaberg]

what differenceis running points over a cdi going to make??? what is points float?

less need for feeler gauges. cdi will give a more reliable spark but its not that important really but things do add up. but on a two stroke lots.

ps heard of google I hear it has lots of answers.

[Ivan]

less need for feeler gauges. cdi will give a more reliable spark but its not that important really but things do add up. but on a two stroke lots.

ps heard of google I hear it has lots of answers.

as I asked that on here I looked it up.

Im trying to see if my mate has my old ct110 motor as that as the flywheel setup I need

[Henk]

Ivan, my two cents for what it's worth. Use the existing points, run total loss with a coil from a hi ace van if that's all you can find and get it running, you can go hunting more power, less weight etc later. With your frame being a scratch build you want the engine room to be as simple and reliable as possible to start with. If it handles as well as it should given the geometry you are basing it on you will be looking at an engine with more development potential before too long in any case.