Are Hydrotec Cyl. heads stock heads that have been shaved (milled) down?
Are Hydrotec Cyl. heads stock heads that have been shaved (milled) down?
tr21 i have measured the hydrotec heads for the 2.6 a couple different times and compared them to stock heads and from what i see they are milled the ht heads on my motor are .030 thinner than some stock 200 heads i have and .020 thinner than a stock 225 excel heads. but i have asked the same question and was told that you could not mill yamaha heads but was not told the reason for it.
I sent Hydrotec my heads and had them cut (VMAX 0X66 225) --no problem.
Ricostreet, How much preformance did you gain from the head work? How much$?Thanks,,
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