Indeed, its quite noticeable the loss of fly wheel weight.

I'm using the later fly wheel now, lighter than the stock one but heavier than the first F3 one's. I like it better as it does pull alittle better.

I have a HRC MC28 fly away wheel here which I was going to try on Fontyyy's but but hes gone modern and gone PGM-II.
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If I have to take the carbs off once more...