Scooterotica

sean brady scooters wrote:in my experience ,the positive stop method is by far the most accurate ...either with head on or off .

In your experience, how do you come to that conclusion?

10 inch Terror wrote:

fairspares wrote:put a dial gauge in the middle then you have it.

I'm confused now. Surely this is the same as the "positive stop" method only with the cylinder head removed. Or I'm I missing something here?

I would say the same

paul d wrote:Someone well respected in the scootering world had a hook suspended from a ceiling on which he'd hang a lambretta engine using the conrod and tdc would get marked off. I can't remember the person but I thought it was a great solution. There's always more than one way to skin a cat!

that would work as long as base gasket face was dead level .. I doubt a lammy motor would hang plumb tbh

Muppet wrote:rice krispies test is best; ya poor some in y plug hole an turn y engine flyweel round til y hear snap mark it back otha way till y hear crackle mark it then y put a pop between the two; works for me

muppet,

W T F is that with skimmed or semi skimmed

RICSPEED wrote:

10 inch Terror wrote:I'm confused now. Surely this is the same as the "positive stop" method only with the cylinder head removed. Or I'm I missing something here?

I would say the same

Using a dial gauge as a positive stop tool would be no more or less accurate than any other positive stop method. But, for ignition timing, you don't need to accurately find TDC with it. Nor is there any need to mark TDC, you don't take any measurements from it

firekdp wrote:

RICSPEED wrote:

10 inch Terror wrote:I'm confused now. Surely this is the same as the "positive stop" method only with the cylinder head removed. Or I'm I missing something here?

I would say the same

Using a dial gauge as a positive stop tool would be no more or less accurate than any other positive stop method. But, for ignition timing, you don't need to accurately find TDC with it. Nor is there any need to mark TDC, you don't take any measurements from it

'you don't need to accurately find TDC with it.'
some mite disagree

Muppet wrote:'you don't need to accurately find TDC with it.'
some mite disagree

I'm sure they will, especially those that think other ways, of finding the firing point, are more accurate. It seems that they don't actually understand the principles of of the method.

firekdp wrote:

RICSPEED wrote:

10 inch Terror wrote:I'm confused now. Surely this is the same as the "positive stop" method only with the cylinder head removed. Or I'm I missing something here?

I would say the same

Using a dial gauge as a positive stop tool would be no more or less accurate than any other positive stop method. But, for ignition timing, you don't need to accurately find TDC with it. Nor is there any need to mark TDC, you don't take any measurements from it

So what are you using for a reference for setting your advance?

10 inch Terror wrote:

fairspares wrote:put a dial gauge in the middle then you have it.

I'm confused now. Surely this is the same as the "positive stop" method only with the cylinder head removed. Or I'm I missing something here?

i know there are different methods and each to their own but i prefer to use a dial gauge with head off , the reason being a dial gauge shows up the dwell much more clearly , once found TDC , you just mark back the number of mm for the desired timing , no need to fit a degree disc , job done.

You dont find TDC, you just find when the piston stops moving, then set it to 0, easy