flathead
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Stage II
Joined: Jan 2018
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From: Freeburg il
flathead
my 45" was running once, when it was, I would ride for about twenty minutes and would lose compression. I could push kick starter with my hand. Wait for bout hour, let it totally cool down and then it would be back to normal, then repeat all over again. I tore down top end, redid valves put total seal piston rings in and new heads. I kick it over to check compression, when I noticed the exhaust port was sucking in. took heads off, put new cams in, put back together. still sucking in at exhaust. Is this supposed to be? I started my 02 road king put my hand over exhaust and kinda felt slight suction/ exhausting alternately. So I'm wondering should I complete putting 45" together or is there an issue with this exhaust suction. Only thing I can think of is I have cams out by one tooth. Which I find hard to believe because I quadruple checked cams before putting cover on. Am I looking too much into this? Does anyone have any input on this subject? Any ideas welcomed.
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From: la la land jerzey
the first problem was it was over heating and lost the piston seal
it might have been an intake leak or a rubber tipped float valve - stainless is the only one to use comes as a kit 2 pieces
second question -- and yes while the exhaust valve is open normally its blowing out as the piston is moving up ( but on over lap the valve is open as the piston has not come to bottom dead center yet (( its still moving down )) so yes you can get a suction at the exact right spot )
it might have been an intake leak or a rubber tipped float valve - stainless is the only one to use comes as a kit 2 pieces
second question -- and yes while the exhaust valve is open normally its blowing out as the piston is moving up ( but on over lap the valve is open as the piston has not come to bottom dead center yet (( its still moving down )) so yes you can get a suction at the exact right spot )
Thread Starter
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Stage II
Joined: Jan 2018
Posts: 2
Likes: 0
From: Freeburg il
Flatyead
the first problem was it was over heating and lost the piston seal
it might have been an intake leak or a rubber tipped float valve - stainless is the only one to use comes as a kit 2 pieces
second question -- and yes while the exhaust valve is open normally its blowing out as the piston is moving up ( but on over lap the valve is open as the piston has not come to bottom dead center yet (( its still moving down )) so yes you can get a suction at the exact right spot )
it might have been an intake leak or a rubber tipped float valve - stainless is the only one to use comes as a kit 2 pieces
second question -- and yes while the exhaust valve is open normally its blowing out as the piston is moving up ( but on over lap the valve is open as the piston has not come to bottom dead center yet (( its still moving down )) so yes you can get a suction at the exact right spot )
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