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1979 Mk2 restoration (Operation Boomerang)
Posted: Tue Jan 15, 2019 11:48 pm
Author: Gavin
I purchased the bike in the mid 90’s form an import company based in Harlston Norfolk a few years later 2000 I sold it to a friend, in December of last year it came home, unfortunetly it has been stood in his garage for a few years so needs a bit af TLC

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Pics of its last day on the road
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Tue Jan 15, 2019 11:51 pm
Author: Gavin
It’s first day home after it’s time away
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Tue Jan 15, 2019 11:55 pm
Author: 8 Valve Mark
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Wed Jan 16, 2019 12:00 am
Author: Gavin
The start of the investigations
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Wed Jan 16, 2019 12:03 am
Author: Gavin
After some advice from Mark regarding the corrosion on the Cams a little oil and a scotch rite pad
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Wed Jan 16, 2019 12:37 am
Author: 8 Valve Mark
they came up well gavin.

lookin forward to the next installments.. m
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Wed Jan 16, 2019 9:59 am
Author: jonathan
Did you see there is a mark II exhaust on eBay......
Cheers
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Wed Jan 16, 2019 10:04 am
Author: jonathan
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Wed Jan 16, 2019 11:28 am
Author: hartyb
its worth remembering that the 1000J Exhaust are the same all but the Numbers
there was a mint one on ebay as well but the guy wants £2300 odd the DK one is double what it should be for that condition
just my thoughts
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Thu Jan 17, 2019 3:48 pm
Author: Philippe
Hi Gavin
you're doing a great job! Keep the pictures coming!
Let the good times roll !
GrtZ
Philippe
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Thu Jan 17, 2019 3:58 pm
Author: rickm
Very impressed with how those cams turned out
Initially I'd have taken them for scrap !
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Fri Jan 18, 2019 7:45 pm
Author: Gavin
Ricky
Took advice from 8 valve mark
Oil the cams wrap in oiled kitchen roll for a few hours then I used a scotch rite pad to clean them up,
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Fri Jan 18, 2019 7:57 pm
Author: Gavin
Regarding the mk2 exhausts from DK, when I bought my first ever Mk2 in 1980 it had original exhausts, they lasted about 18 months before our climate wrecked them, so I bought an Alfa 4 into 1, very load and anti social

, when I first had this one in 1995 it also had originals they also rotted quickly so put a Marving 4into 1, personally I think the 4 into 1 suits the Mk2
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Sat Jan 19, 2019 12:09 pm
Author: Gavin
Taken a look at the cylinder head over the last couple of days a good degrease a coat or 2 of a good paint stripper (the original coating is proving to be stubborn)
It appears the exhaust valve clearances where virtually closed because of the carbon build up, I also believe the head has been off at some point due to a broken fin where you would have expected it to happen, definitely not me or the previous owner because neither of us has ever stripped the head off the bike and it looks like old damage
Re: 1979 Mk2 restoration (Operation Boomerang)
Posted: Sat Jan 19, 2019 12:19 pm
Author: Gavin
Gave the the carbon build up a clean with a fine scotchbrite pad soaked in oil, needs more work but only spent just over 5 minutes per cylinder to get to this stage, had give up before hypothermia set in, (the trouble with concrete garages this time of year )
Also noticed the valve cut on No1 exhaust looks a little odd and this is the one on the test I did the liquid just drained out in under 30 seconds, which again makes me believe the had has been off before.
Thinking back to when I originally bought the bike around 1995 every gasket was new and there was blue gasket sealer visible.