Spark plug status

[kejj]

Thanks for all the good input folks!
I will take all into consideration before next spring.

The truth is that the b7 has been ridden around town with small run ups to 50mph.
The b8 och the other hand has done 200km in one go on speeds as 60mph for 2h.
The tests will continue in a more scientific way with fresh plugs.

The engine is a SIL GP200, the period was during the running in so I was on 4% Mineral 2t oil to wear all the parts in.
I think the percentage leads to a lot of smoke so I will have to try the eng on fully synth 2t from castrol and try the b8 with lower percentage since I don't trust the b7 on a flat out ride for a hour.

Even the good old indian manual recommends 2% 2t oil.

I will have to monitor it close though.