classic motorcycle forum

Mmmm, don't think Zundapp has that engine shape or features ?
https://i.ebayimg.com/images/g/YVcAAOSwZrJbx6iV/s-l1600.jpg

A more recent Ural seems more likely, possibly in older type frames ?
Could there be a clue in the russian-sounding name of the pics ?

how does one know if its working correctly

Engines are a number of 'systems', so each system has to be working - hopefully each at its best.
Spark plugs are a vital link in the chain - have you checked the plug gaps. ?

Reducing the plug gaps down is always a 1st step if you suspect that the spark is weak.
If this improves things, you know its (probably) in this area...

Determining the voltage of those coils might be useful to know too.

Check if the wheelnuts are metric or imperial - that will give a clue as to origin.
The rear wheel sprocket on the right might be a giveaway - if the wheel is in the correct way.

Looks like quite a lot added to it - for competition perhaps ?

You could always ask RS if the paint they supply is a match for that color ?
I've seen it mentioned though that they are somewhat expensive for what you get.
A local supplier could be better ?

And some Triumph dealers (for older bikes) used to be able to supply Amaranth Red in cans ready mixed,
maybe that blue similarly ?

Its possible to get the formula to mix up older type paints - but the accounts above are (partly) right,
the ingredients to do it like that are no longer available. !!
Under their old names - according to the old formulas.

They can start from scratch, and try to get modern ingredients to get a good match.
Including having these computer color scans to try to get the ingredient mix right.
The skill of the operator plays no small part in this, aren't there said to be so many possible shades these
days that every vehicle on the planet could be a (slightly) different color.

I have a Triumph Tigress scooter. Im told its  blue colour is either polychromatic blue,Im not sure of this as a spray can I bought is way too dark ( this is for sale btw)or shell blue.

Something like this one ?


Polychromatic blue comes in about as many shades as every other color does, even 'white' has about 60 million+++ shades. ?
Good paint shops usually have someone who can match colors by eye, a declining skill these days perhaps ?
Do you have a good sample to get a match from ?

If you have the bottom of the forks cushioned with something soft on the ground (old towel etc),
you can usually push down on the whole bike and jump the forklegs up enough that the thread can be started.
This relies of course that the bike is no longer up on a hoist or milk crate, etc, or that the centrestand is tied off so it can't retract.
Having the bike tied off to something overhead may also be desirable, to prevent it tipping sideways and outta control.

I've also heard of folks using a tie-down ratchet strap, to pull the whole assembly up into the yokes.

It is also possible to make what that special tool may be - all you need is an old top fork nut thread ( cut off the hex), drill it and fit a length of rod to it,
with some form of handle, so it can be screwed into the tube and used to pull them up.
Bumping or ratcheting the tubes up seems easier, unless it doesn't work...

The 1st question, which is really incidental, is what did you pay for it ?
And the really important one is does it fit ??

A bird in the hand is worth 2 in the bush, as they say.....
Pressure testing (or leak testing) is probably wise before having it painted and striped.
Having first ensured it really does fit correctly.