Scooterotica

Ive never messed around with points before...

My Luna is slower than it should be. Iv`e been talking to a Sweedish fella who has a Luna with the exact same setup as me and his has quite a bit more power than mine.

I have done some tweeks to my carb and setup and it can now pull second gear in the hills.

The last thing for me to check is the Timing. I know it should have been the first thing to check but I have put it off simply because I havn`t done points before.

Armed with stickies book I will crack on.

One thing that I wonder about is that the Sweed is running 25 degrees BTDC and has done for a few years. I always thought that somewhere between 19-21 would have been better on a standard(ish) machine.

Basicly the 75 kit I am running is a true copy of a standard Vega cylinder.

Im I wrong?

I would say 25 BTDC is too advanced leading to overheating; "kicking back" and more serious problems.

Personally I would be looking at 20 BTDC as a max advance.

What is the fuel like over there? Same as UK- crap?

Chris

Yeah, same shitty stuff as the uk I think.

Ok, thanks i`ll start at 20. I have swapped mag-house, piston, cylinder and crank so timing should have been checked first...

I did fancy 12v but the points seem in good nic and its an easy starter (pluss the fact that the 12v casa kit costs £300)

I would start from scratch and ignore all marks on flywheel/ housing.

Basically determine TDC by using the positive stop method (arrow or mark flywheel, then rotate one way and mark on housing- then the other way and mark on housing. Divide the distance between the two which will give you TDC)

Then using a degree wheel rotate anti clockwise 20 degrees- thats where the points should fire.

Chris

Thanx...

And just to comfirm.. The fireing point is when the contact opens ? (the opposite of what I though )

the moment the points open- you can test this using a lamp and a battery, or do it the old way with a cigarette paper.

Not that familiar with the small frame Lambrettas- I assume the flywheel turns the same way as the larger scooters? (i.e. clockwise)

Chris

If you've got a strobe then you should use this, just as you would with electronic ignition. If you don't have a strobe... buy one!

Adam

Err... A strobe I have!

I didn`t think they worked on 6v?

Ignition is ignition and all you are trying to determine is when the plug fires. Providing the plug fires, it doesn't matter whether it is 6v or 12v. I strobe every 6V points system that I set up.

Incidentally, there is no difference between the voltage of the ignition of a 12V lighting system electronic stator or an original 6V GP200 Electronic stator, the LT coils are the same.

Adam

Definitely strobe. Personally I like the reassurance of knowing that I have seen the firing point and also that it is stable as I rev.
I did an electronic for somebody the other day and having rescribed a new TDC mark I lined up the pick up lines with the marks on the new flywheel and strobed it only to find they were about 3 degrees wrong. It was only a standard engine but I like to video repairs for the owners to show what has been done.
So strobe.