Spark Plugs : which ones to use 4age ?

[jondee86]

All the bigport (TVIS) engines use 1.1mm gap plugs. In the
NGK range they would be :

BCPR5EIX-11 Iridium
BCPR5EP-11 Double Platinum
BCPR5EY-11 Copper

5 is the stock heat range for everyday round town driving. For racing
you might want to go to a slightly colder 6 heat range e.g. BCPR6EY-11.
I used these for years (6's) in a bigport for all types of running, and
never had a problem.

The smallport would use 0.8mm gap NGK plugs :

BKR6EIX Iridium
BKR6EP-8 Double Platinum
BKR6E Copper

Using BKR6E in my smallport and they work fine NGK and Denso are
the factory recommended brands, and I wouldn't use anything else.

Cheers... jondee86