Good point Alibaba!

I totally missed pointing-out the petrol issue and plug issue.
Friend of mine bought a 1983 R100RT this summer. The bike was reluctant to start and had some funny sounds. The previous owner had done some service, like NGK BP6ES... We installed WD5 and the engine fired-up at the first try -
Pluggs matters!

I always try to fill at stations offering "clean/pure" 98-octane (EU: Super or Super Plus ?) - using 95 results in "extra sounds" and "less mileage". I do make it a point to use the "best" petrol companies; Statoil, Shell, BP and avoid Jet, OK/Q8, and other minor stations - in an effort to get as clean petrol as possible at the best octane possible.


Here are some plug options:
R100RT 1981.
Bosch WR8 LTC+ ; ran like a dream and was easy to start!
NGK BUR6 ET; Hard to start, but ran as smoothly as with the Bosch plugs.


R80/7 1984. (Siebenrock kit with dual-plugging)
BUR6 ET (long thread) och BP7 HS (short thread); exactly like the R100RT, a bit reluctant to start, but runs like a dream!


3 electrodes:
*
R100;
NGK: n/a. Bosch: n/a, but W5 DP 0 have 1 side-electrode instead of the .
*
R75-80;
NGK: BUR6ET, Bosch: W 7 LTCR, W 7 DTC


I have not yet tested Bosch Super, 4-electrode special VW plugs - for those who want to test them:
*
R100 = WR56 only long threads available.
R75-80 = WR78 long thread, WR78G short thread.
Spark gap 0.8mm.

__________________
Drive Safely,
Albert