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Endless Nameless |
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Endless Nameless World Chat Champion
Joined: 20 Nov 2007 Karma :
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Posted: 18:15 - 24 Jan 2009 Post subject: GS550 wont start- not sure why, has fuel and spark. |
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Erm, yeah, like it says really. Bike cranks over fine (it's a later one, 'leccy foot only), oil light goes straight out and it spins over no trouble but normally doesn't "catch" at all for ages. Sometimes it will nearly start first jab of the starter but then will just spin. Eventually it will catch briefly and very occasionally start off the starter, usually I resort to a bump start. If I've managed to get it to catch on the starter it bumps straight off, if I just try and bump it without having spun it over for ages it takes a while to go. Once running it's OK, if a bit lumpy, but does seem a bit down on power. It'll restart fine if it's been run within say 5 hours, first jab of the button.
Have hoiked a plug out after having span it over (but not had it running) the plug looks fine, as does the spark. Can smell fuel at the exhaust too when cranking it over.
Not really sure what it could be- the battery is recent and has plenty of life in it and the starter spins it over at a decent rate.
Timing has been suggested, but I thought I'd ask you lot for ideas. ____________________ A2 passed 22/07/08; restriction up 22/07/10 (just so I don't forget)
'79 Suzuki GS550E. Yes, that's a GS550, not a GS500.
Supersports "In a video editing competition I'd kick your sorry ass" |
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TUG |
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Endless Nameless |
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Endless Nameless World Chat Champion
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.Chris. |
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.Chris. World Chat Champion
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TUG |
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Endless Nameless |
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Endless Nameless World Chat Champion
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NiteMare |
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NiteMare Spanner Monkey
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Endless Nameless |
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Endless Nameless World Chat Champion
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Posted: 14:39 - 25 Jan 2009 Post subject: |
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She's a '79 nitemare. The points are fine, been checked... timing hasn't been done.
I was going to take her in to the garage round the corner and ask him to take a look at the timing and sort the shims 'cos I suspected that might need doing.
I'll also try and pick up a cheapy compression tester- or ask him to do that too.
Cheers for the help ____________________ A2 passed 22/07/08; restriction up 22/07/10 (just so I don't forget)
'79 Suzuki GS550E. Yes, that's a GS550, not a GS500.
Supersports "In a video editing competition I'd kick your sorry ass" |
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mattsprattuk |
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mattsprattuk Super Spammer
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Posted: 14:42 - 25 Jan 2009 Post subject: |
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by timing i assume you mean cam timing?
i seriously doubt that could be the problem, considering when it was running, it wasnt running that badly (apart from the burning oil thing).
when surepass wanker fucktards timed my bike up wrong, it was a complete cunt to start, wouldnt idle unless i jacked up the idle screw, and delivered its power like a 2 stroke.
dont take it to a mechanic.
do it yourself. i can even teach you how to take valve clearances if you really want, as ive done it enough times on both my DOHC bikes.
i personally think its the rings. it would explain the burning oil and shit starting when it did work. also, when i rode it, it wasnt exactly 550cc power (probably due to the horribly slipping clutch) get new friction plates and gaskets. may as well sort it all out in one go. they arent expensive ____________________ Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith
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NiteMare |
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NiteMare Spanner Monkey
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Endless Nameless |
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Endless Nameless World Chat Champion
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TUG |
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TUG World Chat Champion
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Posted: 23:11 - 25 Jan 2009 Post subject: |
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Endless, Nameless wrote: | Burns oil all the time I think, extra smokey on a gearchange or when being thrashed. I was hoping it was just the stem seals.
It was cam timing that was suggested to me as being "out", by a friend who had it slip on his Spitfire with similarish results. I've done the points, they were fine, but need to have a poke at the ignition timing.
Checking the ignition timing, doing a compression test, sorting the valve shimming (if you know how to do it Matt, much appreciated) and doing the stem seals (in that order) is the plan. Ta folks. |
When you say gear change, what colour is the smoke, and what sort of revs does the smoke appear? High revs used to show black smoke when i was really gunning it or clutching wheelies as it was running rich on the top end. Is that anything like yours? Maybe mine was due for rings too if thats the case but it wasnt really burnin oil tbh. ____________________ Haz ER-5, innit! |
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NiteMare |
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NiteMare Spanner Monkey
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Posted: 02:53 - 26 Jan 2009 Post subject: |
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grey/white puffs of smoke on the over-run when changing gear indicate it's sucking oil in via the inlet valves, continual grey/white smoke would indicate there's wear all over the top, grey smoke just on start up would show stem seals worn and oil draining into the ports....
black/bluey smoke would indicate it's running rich...
valve timing won't need touching unless the cams have been removed at some time since your problems appeared and you've re-assembled them incorrectly ...
now this bike being 30 years old is likely to be showing signs of general wear and tear, valve seals and guides getting a little tired, valve seats recessing and not sealing 100%, rings could "possibly" do with replacing but without carefully measuring/checking the bores and ring gaps you won't know for sure, but there is a simple test to give you a basic indication of compression problems, run the test over each pot once and record the results for each cylinder, then run the test a second time but this time pump a couple of squirts down onto the piston and record the results again, compare the before and after pressures to see if there is indication of bore/ring wear , then compare the oiled pressures with the pressures stated in the manual to see if the valves are not seating properly...
come back and give us the pressures to give a diagnosis of needs
p.s.
how nice is your GS ?? put up a picture, i've got 1.75 GS550l's, ones nice and tidy (not mint) and another for a future project
p.p.s.
these engines are "almost" indestructible with regular oil/filter changes ____________________ it ain't broke...
i ain't fixed it enough |
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TUG |
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TUG World Chat Champion
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Posted: 04:49 - 26 Jan 2009 Post subject: |
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Thanks for that information, i should take notes for work purposes an further my knowledge, i might get a pen an pad after. I was taught all that but you know how it is, sleep since, reset/ ____________________ Haz ER-5, innit! |
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Endless Nameless |
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Endless Nameless World Chat Champion
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Posted: 14:18 - 26 Jan 2009 Post subject: |
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Y'know, I really haven't paid much attention to the smoke- Chris or Tristan, you've both followed me- what do you think?
I'd say it's grey on start- up. She is fairly high mileage, getting on for the 70k mark. Cams haven't been touched- all that's been off since I've bought her is the carbs, the exhaust and the points cover. I suppose the starting issue could be fuelling but I'd like to solve the oil burning too while I'm having a tinker.
I'll try and acquire a compression tester, have a play and get back to you, thanks everso for your help... have an e.pint on me, or a real one if I ever meet you...
Oh, piccies, we can do that.
https://i3.photobucket.com/albums/y66/brianthesnail96/CIMG0234.jpg
https://i3.photobucket.com/albums/y66/brianthesnail96/CIMG0237.jpg
A long way from mint, but not too shabby. Have got rid of the motad now, something small and noisy on there.
https://i3.photobucket.com/albums/y66/brianthesnail96/meeeeonGS.jpg
I actually dont have any decent side- on photos. ____________________ A2 passed 22/07/08; restriction up 22/07/10 (just so I don't forget)
'79 Suzuki GS550E. Yes, that's a GS550, not a GS500.
Supersports "In a video editing competition I'd kick your sorry ass" |
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Tristan. |
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Tristan. World Chat Champion
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.Chris. |
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Tristan. World Chat Champion
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TUG |
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TUG World Chat Champion
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Posted: 17:54 - 26 Jan 2009 Post subject: |
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That bike is gorgeous!
Any signs of a small leak on your bike? My CG had a small leak an when i'd check my oil level it would of dropped a fair bit within a couple of long rides. ____________________ Haz ER-5, innit! |
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NiteMare |
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NiteMare Spanner Monkey
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Posted: 00:05 - 27 Jan 2009 Post subject: |
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looks quite tidy
if you want to sort the start up smoke you'll be wanting to lift the head off to fit new stem seals, which will give you ample opportunity to sort the valve gaps/seats while you're at it ...
also i'd check the condtion of the bores and rings whilst in bits ...
google "robinsons foundry" , sign up with "old skool suzuki" as you'll get 10% off as a member of that site and aboslutely tons of knowledgeable folks on there ____________________ it ain't broke...
i ain't fixed it enough |
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Endless Nameless |
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Endless Nameless World Chat Champion
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Old Thread Alert!
The last post was made 15 years, 143 days ago. Instead of replying here, would creating a new thread be more useful? |
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