How I fixed my KZ engine problems (after a year!)

I think Nads will want those BS34 jets... no wait, he makes his own. :laugh:

Your plugs are cold, I'm running 6s on mine. Another thing, wait to get the Iridum plugs until you've have everything else ironed out. 1 Iridum plug costs nearly as much as 4 normal plugs. :pinch:

Your plugs are cold, I'm running 6s on mine. Another thing, wait to get the Iridum plugs until you've have everything else ironed out. 1 Iridum plug costs nearly as much as 4 normal plugs.

Generally it is advised when compression is increased from stock to go with a colder plug range.

A rule of thumb is, one heat range colder per modification or one heat range colder for every 75–100hp you increase. In identical spark plug types, the difference from one full heat range to the next is the ability to remove 70°C to 100°C from the combustion chamber.

Depending on engine model, for mine it's 7 range (hotter) if riding in low temperature and low speed to prevent fouling and 8 range for normal operation , 9 range is for racing and modification has been done the the gpz engine. After checking, spark plug temp is optimal at 9 for my bike.

With the stock 8 range i start to see ceramic insulator overheating (glazing).

I think i could go to 10 range (coldest possible) but for now its perfect!

I think Nads will want those BS34 jets... no wait, he makes his own.

I heard he gather zinc and copper from the rocks , make a brass ingot, make his main jets to the smallest size and then DRILL his main jets :laugh:

regards,
laurent