3mb00 barrel with a 3bn head...
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Yeah that's normal, mine had a 3mB00P barrel and 3BN head, got a 3MB head off eBay and it made some difference, best bet would be to just do what I did, payed 50 for a good condition head, took a bit of searching f to get a good one though, a lot of them look like they've been frisbee'd off a cliff
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Best give him a ring really. Doubt he really checks his Facebook. He is a nice enough bloke you can ask him.
When I spoke to him he quoted 170 for barrel ported and head squishband and powervalve adjustments.
In order for him.to.do his work he needs the piston you are going to use, barrel and of course the head.