GT550 oil questions
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- Still in the Driveway
- Posts: 7
- Joined: Tue Jul 01, 2014 11:31 am
- Country: Canada
- Suzuki 2-Strokes: GT250,GT550,RZ500,FJR1300,Katana750,YZFR1
Re: GT550 oil questions
Awesome thanks!:)
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- On the street
- Posts: 17
- Joined: Wed Feb 25, 2015 1:12 am
- Country: Australia
- Suzuki 2-Strokes: 76 GT550
Re: GT550 oil questions
Ok I know this is an old post but just working on 76 GT 550 again so need to confirm a couple of things as my manual is not clear even though it’s a Suzuki manual.
The oil fillet near oil pump- does motor oil go in there or gearbox fluid.
Does the 1500cc stamped mean 1.5 l?
And lastly to drain the oil is the plug facing straight down or the one angled to rear?
Lastly what air filters are being used, mine are falling apart ( standard air box)
Any one live on central coast nsw.
The oil fillet near oil pump- does motor oil go in there or gearbox fluid.
Does the 1500cc stamped mean 1.5 l?
And lastly to drain the oil is the plug facing straight down or the one angled to rear?
Lastly what air filters are being used, mine are falling apart ( standard air box)
Any one live on central coast nsw.
- Alan H
- Moto GP
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- Joined: Thu Feb 16, 2012 11:50 am
- Country: England
- Suzuki 2-Strokes: 4 x GT550s - J, M, A, B.
- Location: The Republic of South Yorkshire
Re: GT550 oil questions
if you mean the rubber with the raised section to hold, yes. 20w50 MINERAL oil. Not anything synthetic, or the clutch will slip. Some folks use gearbox oil, but Suzuki did not specify that.
Yes.Does the 1500cc stamped mean 1.5 l?
Yes, the vertical one. The angled one is the selector dêtente and a spring and plunger will fall out if you remove it.And lastly to drain the oil is the plug facing straight down or the one angled to rear?
Standard ones. There are plenty about.Lastly what air filters are being used, mine are falling apart ( standard air box)
Dunno that one!!Any one live on central coast nsw.
Think of how stupid the average person is, then realise that half of them are more stupid than that.
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- On the street
- Posts: 17
- Joined: Wed Feb 25, 2015 1:12 am
- Country: Australia
- Suzuki 2-Strokes: 76 GT550
Re: GT550 oil questions
Thanks Allan, well I did take the angled one out and yes there was a spring and a bulletin shaped piece . Hopefully in okay. Pointy bit up. Didn’t realise and my funnel overflowed
It did have 75/95 semi in it. Or 75/90.
Have had a bit of oil running out of exhausts so that’s something else to look into.
Crank seals have been done.
It did have 75/95 semi in it. Or 75/90.
Have had a bit of oil running out of exhausts so that’s something else to look into.
Crank seals have been done.
- Alan H
- Moto GP
- Posts: 3182
- Joined: Thu Feb 16, 2012 11:50 am
- Country: England
- Suzuki 2-Strokes: 4 x GT550s - J, M, A, B.
- Location: The Republic of South Yorkshire
Re: GT550 oil questions
Oily exhausts usually means it needs a good long run, not just garage runs.
Think of how stupid the average person is, then realise that half of them are more stupid than that.
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- On the street
- Posts: 17
- Joined: Wed Feb 25, 2015 1:12 am
- Country: Australia
- Suzuki 2-Strokes: 76 GT550
Re: GT550 oil questions
Yeah that’s my problem, unlicensed unregistered
The air filters are they 40mm, sets on ebay.
The air filters are they 40mm, sets on ebay.
- tz375
- Moto GP
- Posts: 6206
- Joined: Mon Nov 03, 2008 10:47 am
- Location: Illinois
Re: GT550 oil questions
Alan is correct that a good hard run should burn off excess oil in the crankcase and exhausts, but it may be there from a weeping check valve in the oil supply lines. It's quite common on our old bikes for oil to seep down past one or more check valves.
We all have preferences for oil and again Alan is correct that Suzuki specified regular old engine oil, but oils have changed a lot since the seventies. Do not use any oil that says Friction Modified or terms like that. They will cause clutch slip. My preference is to use gear oil for a 2 stroke transmission and Honda sells that in an easy to use liter container. If you want to use engine oil, that is probably OK and many riders still use it in their 2 stroke transmissions with no ill effects. But transmission oil is supposed to have higher shear strength and should help the old transmission last a little longer.
To be honest though, we typically don't do enough miles on our old bikes to make much of a difference.
We all have preferences for oil and again Alan is correct that Suzuki specified regular old engine oil, but oils have changed a lot since the seventies. Do not use any oil that says Friction Modified or terms like that. They will cause clutch slip. My preference is to use gear oil for a 2 stroke transmission and Honda sells that in an easy to use liter container. If you want to use engine oil, that is probably OK and many riders still use it in their 2 stroke transmissions with no ill effects. But transmission oil is supposed to have higher shear strength and should help the old transmission last a little longer.
To be honest though, we typically don't do enough miles on our old bikes to make much of a difference.