the no is normally stamped very small where the pin for the steering lock exits the switch the no will start with a letter Z you will need a magnifier glass to read the no

1z through to z900A4 all the same but z1000A models are different as is the z1000 d1

yes its shorter & different part no

i did have a full kit of these terminals & the removal tools but my son knocked a gallon tin of thinners over in the garage & it spilt over the plastic case & melted
the plastic all over the terminals

i found these i don't know if they are the correct size though

https://www.autosparks.co.uk/electrical ... other.html

there is a trade centre near you in Portsmouth take a sample of the ones you want as their catalogue is huge

Würth UK Ltd.
Trade store Portsmouth
Unit 3, Ameiva Point Quartremaine Road
PO3 5QP Portsmouth, Hampshire

0239 266 3251
0239 266 2516
portsmouth@wurth.co.uk

wurth do them

i would say your problem is the clutch basket

there are two copper spacers in the starter clutch one fits on the crank the other is inside the clutch which comes in three different sizes. the drive clutch will certainly need repairing with new springs & rivets or replace it with a used one

have you checked the movement of the starter gear? if this is not shimmed correctly it will make a noise similar to crank end float & will not be constant ?

ignition advance is the same on both models ( z1100r1 gpz1100 /a1/a2 ) i cannot see why a 1100a1/a2 wouldnt work on a z1100r1

same fixing but wiring colours & connectors are different