Oh dear GT550 Engine not sounding good

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barney01
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Re: Oh dear GT550 Engine not sounding good

Postby barney01 » Tue Sep 10, 2019 8:58 pm

Paul it certainly looks like your cylinder mixture was contaminated with gearbox oil. The reason your left cylinder had some as well is because the right SRIS would have fed some of the same into the left cylinder and that accounts for the middle being unscathed
NO SMOKE .......NO POKE

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Harrymail
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Location: East Yorkshire

Re: Oh dear GT550 Engine not sounding good

Postby Harrymail » Tue Sep 10, 2019 10:33 pm

barney01 wrote:Paul it certainly looks like your cylinder mixture was contaminated with gearbox oil. The reason your left cylinder had some as well is because the right SRIS would have fed some of the same into the left cylinder and that accounts for the middle being unscathed


Thanks Barney, that's good info. I didn't know how the SRIS works. I now understand how the oil can get to the LH cylinder. I expect when I drop the oil it will have petrol in it.

Paul
1977 GT550A Black
2002 Fazer 600 Silver
1968 BSA Bantam Red

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Harrymail
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Re: Oh dear GT550 Engine not sounding good

Postby Harrymail » Wed Sep 11, 2019 9:18 am

Alan H wrote:Well, my 550A crank has just got back to Baz after a rebuild, so I hope the seals weren't out of your batch........ :roll:


I'm really surprised that this has happened Alan. Not what you would expect with a £500 crank rebuild. The crank was fine before the engine rebuild, but on strip down there was play on the conrods, hence having it rebuilt.
1977 GT550A Black
2002 Fazer 600 Silver
1968 BSA Bantam Red

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Alan H
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Re: Oh dear GT550 Engine not sounding good

Postby Alan H » Wed Sep 11, 2019 10:26 am

I think everything on my engine was 'tired'. Crank seals, bearings, gearbox bearings etc. I know it had some tatie while I had it, but as it wasn't a standard motor when I had a look inside during the resto, I don't know how it had been treated prior to getting the bike. Have a look on the 'Earwig' thread, which will be updated when there's progress 'soon'! :roll:
Proof that four strokes are over complicated

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Harrymail
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Re: Oh dear GT550 Engine not sounding good

Postby Harrymail » Mon Sep 16, 2019 8:30 pm

Well thats the engine back out, ready for its second annual holiday to Dudley. Fingers crossed that second time will be the last time. Much easier to remove the engine this time having already done it once. And at least its all clean this time.

Paul

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1977 GT550A Black
2002 Fazer 600 Silver
1968 BSA Bantam Red

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stevewharton
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Re: Oh dear GT550 Engine not sounding good

Postby stevewharton » Mon Sep 16, 2019 8:54 pm

Good luck Paul, I hope Baz sorts it for you. How long do you think it'll be before it's back on tbe road?
Look, my paintwork hasn't got "Fish scales" :x they're "Dragon scales" right!!! However, after some thought, I will accept "Black Marlin" or "Swordfish", but definitely not "Haddock" or "Cod".

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Harrymail
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Re: Oh dear GT550 Engine not sounding good

Postby Harrymail » Mon Sep 16, 2019 9:08 pm

stevewharton wrote:Good luck Paul, I hope Baz sorts it for you. How long do you think it'll be before it's back on tbe road?

First week of October before Baz can fit it in, so mid October possibly. Hopefully I can get a few miles in before the gritters are out. About the same time as you might be back on a bike Steve.
1977 GT550A Black
2002 Fazer 600 Silver
1968 BSA Bantam Red

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Harrymail
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Location: East Yorkshire

Re: Oh dear GT550 Engine not sounding good

Postby Harrymail » Sat Nov 16, 2019 1:36 pm

Dudley tomorrow to collect my engine from Baz. Looking forward to getting it back in the bike again :)
1977 GT550A Black
2002 Fazer 600 Silver
1968 BSA Bantam Red

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Alan H
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Re: Oh dear GT550 Engine not sounding good

Postby Alan H » Sat Nov 16, 2019 2:43 pm

So that's why it's taking him so long to do my 550J engine is it? Image
Proof that four strokes are over complicated

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Harrymail
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Re: Oh dear GT550 Engine not sounding good

Postby Harrymail » Sat Nov 16, 2019 4:52 pm

Alan H wrote:So that's why it's taking him so long to do my 550J engine is it? Image


Have I jumped the queue Alan ? At least Baz has had plenty of practice with 550 engines lately so it should only be half a days job :lol:
1977 GT550A Black
2002 Fazer 600 Silver
1968 BSA Bantam Red


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