Hey guys thanks for the help. It appears that the new 15 racing has the kokusan ignition. So I will have to order a new flywheel weight.
On paper it seems silly to add 600 grams of weight to a light weight trials bike. But the benefits are undeniable. Over here in oz it's very rare to see a top rider without one on. We have very dry, dusty and slippery conditions.
Mods such as slower action throttles and low compression inserts are popular over here among the older riders.
Thanks guys.