MARK CHRISTIES KWAK 500 S6

[T5-190]

You are correct Ric, there is no lighting coils on the KX500. You can have one wound and fitted but it only has a few watts. Just about enough to power a brake light. The alternator was from E-bay and came from a mini digger like a "Bobcat". It was the smallest I could find, it gives 90 amps @13.8v. Oh and it was £40 deliverd.

[joespeed]

You are correct Ric, there is no lighting coils on the KX500. You can have one wound and fitted but it only has a few watts. Just about enough to power a brake light. The alternator was from E-bay and came from a mini digger like a "Bobcat". It was the smallest I could find, it gives 90 amps @13.8v. Oh and it was £40 deliverd.

is the alternator easy to wire,no external regulator?
regards
joe

[T5-190]

Hi Joe, it is indeed easy to wire up an alternator. Some alternators only have one wire, so this just goes to the + on the battery. The one I have has three conections, one goes to the battery, one goes to the + on the ignition switch and the last goes to the fuse box (if you have one ).

[joespeed]

cheers

[twin peeks]

never seen an alternator on a dirt bike,enduros have lighting coils fitted ,west country windingswould sort this .headlights are ok brake light spot on alternator takes alot of power to run .but novel idea good luck

[T5-190]

When I had the dumb idea of putting this KX engine into a Lambretta, one of my worries was the output from the flywheel. So with this in mind I joined the KX Riders website, due to the very small size of the KX flywheel there is very little space left inside the flywheel for charging coils. At the very most 35 watts can be gained. This is not enough for what I want to run. When an alternator has finished charging the battery the charging field collapses to nothing. So the alternator free runs. Unlike a stator and flywheel there is no charging field or heat to get rid off. But you are right they never fit this sort of set up to a motor X bike. They would fit a battery or two on a dead loss system. But as I have the space why not.

[twin peeks]

hello ,i guess you must be busy on the bike hows it going mark ,

[T5-190]

Things have been moving on a bit. But work keeps getting in the of playtime I will try to post a few new picture today. I have stripped and powder coated the alternator and is back on the scooter. Also I have fitted a decompressor to the head to aid starting. Again powder coated and refitted. I have the side panels and the leg shields to clear coat too. The leg shields needed to be trimmed a little to miss the headset as I have used GP drops. The damn leg shield toolbox caught me out a treat though. I bought it from a parts fair and it is a Rally style GP one. So rather than carbon fibre coating it I had it shot blasted and was going to powder coat it black. But when I picked it up it looked sh*te, it has been made by welding 3 parts together and filling the whole lot with filler. It has been hammer beaten into shape so its covered in hundreds of little dents. So back to carbon covering it.

[T5-190]

A few more from today. I managed to get into the shed for a couple of hours. Hope to be clear coating the last few parts in the morning.



De-compressor fitted to head.



Also I have fitted a very small finned tube to act as a small heatsink/rad to help with the cooling. If things start to get to hot under the panels I will replace it with a piece of tube.





One fitted underneath too. We use this ally finned st/st tube at work to make industrial rads from. If anybody wants a length let me know I have three, 3 meter pieces left. It has a 22mm O/D. Free to a good home.


Carb back on and looking ehh pretty.

[RICSPEED]

get the bugger fired up and on youtube so we can hear it