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F2 Camshaft Towers

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neilg:
I am using an F2 top end on my latest. The head I have has 8 studs to support the camshaft towers. The parts lists show the usual mix of 4 studs and nuts and 4 bolts. Has any one any idea if this is a later factory change or is it something that has been modified by a previous owner. Any thoughts?

UK Pete:
Post a pic

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neilg:
The studs are being used for the four caps. Bolts are still used on the center fastenings, they look factory but I've never seen studs used on all four cap fasteners and would like to know whether to leave or swop them.

K2-K6:
The Honda manual for F3 version (runout model of F2 for USA) shows studs for front / exhaust side of head and bolts for rear / carb side of head.

I suppose it's possible the pictures in manual didn't keep up but suggests that they're the same as all the others in the info I've got.

r1_pete:
From an engineering viewpoint studs are a better solution, less chance of stripping the threads in the alloy head.

It could be someone has stripped one or more, and put studs in to reach undamaged threads deeper in the hole..

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