Sorry for taking so long! It's 21 degrees BTC + or _ 1, or 1.66 - 2.00mm if using a dial guage. Is anyone using less to 'cope' with modern fuels? By the way if you have a 125cc conversion the J models are 24 degrees or 2.40- 2.80mm.
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Join date : 2012-04-16
Location : Surrey
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