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Martin, I'm sending you a head with a couple of valves, collets and an early spring. Can you use your tester to see if the 'old' and 'new' springs are different. That'll allow you to get stack height and pressure comparisons which might answer some questions about the shims for early engines.The head I would only use again under duress on one of my shitheap. Can you see where? Pete
M6 exists in 0,7 and 0,75 thread , so a overtightend fit might also be a slightly different thread. they are quite hard to distinguish
if they had previously been gorillared they would tend to twist of the top of the adjuster with the nut when you came to loosen them again.
ButThese alone will not fix lario, before anyone goes here1/ check camshaft for wear, dial gauge on all 4 lobes, easy mount in recess on rocker arm above pushrod. If cam is worn, at all, do not pass go, stay in jail till new cam is found/ground2/ turn engine over without plugs, look at valve springs at peak lift, coil bind is your enemy, explaining why cam gets worn.Pete also sent me beehive spring from 1400 to test, me likee, I'm using these, pressures and installed heights to follow (need new valves to do this too)
not been this deep in to an engine before. Is an elephant foot a roller tappet and where can I get them??
Thanks, yes I'll be checking carefully when I get to it. What dimensions are the Cali springs?
Rocker hitting the pedestal - that is a new one, I've not looked but will now, time to buy some Rizzla papers. Don't understand the clearance between rockers on overlap? So you mean left and right rockers rub/hit each other?I have lash caps that were part of Guzzi's upgrade on post 87 (?) Larios; intend to use them with Yamaha adjustersCheers