1967 P11 rebuild - Dynamite on wheels
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1967 P11 rebuild - Dynamite on wheels
Started the 'limited' rebuild of my 1967 P11 today while i've got time at home
Its been burning oil for a while , certainly more than it normally does
Kitchen clear to give space , and head off with engine still in the frame , barrel off later ready for removing engine from the frame
Makes a change to do this at home and not on the way to a rally or a few days before leaving with a deadline looming
Its always been my long distance touring bike , and I dont think the G15CSR will replace it due to 2.5gall fuel tank but time will tell
also forces me to clean the bike while doing the rebuild . first impressions are that there is not ridge in barrel so may be just a new set of rings and hone (wishfull thinking at this stage)
Plan is to replace superblend main bearings and BE shells at the same time
Its been burning oil for a while , certainly more than it normally does
Kitchen clear to give space , and head off with engine still in the frame , barrel off later ready for removing engine from the frame
Makes a change to do this at home and not on the way to a rally or a few days before leaving with a deadline looming
Its always been my long distance touring bike , and I dont think the G15CSR will replace it due to 2.5gall fuel tank but time will tell
also forces me to clean the bike while doing the rebuild . first impressions are that there is not ridge in barrel so may be just a new set of rings and hone (wishfull thinking at this stage)
Plan is to replace superblend main bearings and BE shells at the same time
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Last edited by g80csp11 on Sun Aug 16, 2020 9:39 am, edited 1 time in total.
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Re: 1967 P11 rebuild
heavy crusty deposits on crown
Cylinder bores in good condition with circ 1 -2 microns wear at maximum
Pistons are +.040 modern hepolite manufactured by JCC and sold under Genuine Hepolite brand by wassell
decided to de-glaze bores and fit new rings
rings are fully bedded in with top and second ring still with 15 thou ring gap , but the oil control ring is at circ 50 thou
must e very soft cast iron giving fast bed in , but reduced durability
overall , no significant problems that cant be easily overcome
not bad considering the distance and performance
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Re: 1967 P11 rebuild
Roy , it was either this or cut the hedges and i know which i prefer to do
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Re: 1967 P11 rebuild
Save time in and out the house making tea and sarnies, forward planning I think that's called.
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Re: 1967 P11 rebuild
The kitchen is the wright place for an old cooking norton
good luck with the rebuild
Tony
good luck with the rebuild
Tony
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Re: 1967 P11 rebuild
I suspect this was a rod failure , after which the broken rod gets trapped between the crankcase and flywheel
Mine has had rod failure in the past , with extensive repairs ( pictures later ) , luckily no where near as bad as this one
I can only imagine what he was saying at this point !
SO anyone rebuilding a G15 or P11 should check their conrods during rebuild and fit the later 'superblend' main bearings
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- ajscomboman
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Re: 1967 P11 rebuild - Dynamite on wheels
Thanks Peter, you really put my mind at rest now!!!g80csp11 wrote:check this utube clip out , is this why that called the P11 dynamite on wheels
I suspect this was a rod failure , after which the broken rod gets trapped between the crankcase and flywheel
Mine has had rod failure in the past , with extensive repairs ( pictures later ) , luckily no where near as bad as this one
I can only imagine what he was saying at this point !
SO anyone rebuilding a G15 or P11 should check their conrods during rebuild and fit the later 'superblend' main bearings
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Re: 1967 P11 rebuild - Dynamite on wheels
Rob , you wait until you see the welding on my crankcase - haha
I'd just sell it at a loss ASAP , I might even make you a low offer
I'd just sell it at a loss ASAP , I might even make you a low offer
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Re: 1967 P11 rebuild - Dynamite on wheels
Looks as though the gear lever would straighten out ok.