My 750 smokes pretty thick on all pipes at start up but thins out to normal after briefly warming up. Is this typical? It sat for 20 years with oil in the tank. I am beginning to wonder if one of the check valves is stuck open/gummed up and draining. From what I understand these valves can not be disassembled. Only cleaned with solvents.
If nobody else experiences heavy smoke at start up I will have to try the trick with the different colored oil and mark its position while sitting to see if I loose any. I really don't want to pull the lines out and drain the coolant so hopefully I will be able to tell while its on the bike. Am I risking damage to anything at start up if it has sat for a long period of time?
Anyhow, the bikes about to go to bed for the winter time as we have snow coming. If only I would have known all these things when I had the entire engine apart! The good news is I will know next go around when I buy another buffalo tomorrow! Can't wait!
Thanks!
Heavy smoke at start up.
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cl4yd0h
- On the street
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- Joined: Sun Sep 30, 2012 5:22 pm
- Country: US
- Suzuki 2-Strokes: 74 GT750L, 09 HD XR1200
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Coyote
- Moto GP
- Posts: 3404
- Joined: Tue Oct 21, 2008 2:41 pm
- Country: USA
- Suzuki 2-Strokes: GT550x2, GT750, GS1000
- Location: Tulsa, Oklahoma
Re: Heavy smoke at start up.
Sounds like your bike is running perfectly normal. Most all of the 2 strokes produce a thick cloud of smoke on a cold start. If the cloud thins out as the bike warms, you're good to go. If it doesn't thin out --- that's when you need to worry.
I wish Suzuki had built the oil pumps with the ability to 'pull' as well as push. That would eliminate those 6 fragile valves. Could have used ONE between the tank and pump! Sadly these pumps can only push oil and depend on the laws of gravity to feed them.
I wish Suzuki had built the oil pumps with the ability to 'pull' as well as push. That would eliminate those 6 fragile valves. Could have used ONE between the tank and pump! Sadly these pumps can only push oil and depend on the laws of gravity to feed them.
I was born with nothing and still have most of it left.
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1978 GS1000C
1976 GT550 ongoing money pit.
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1978 GS1000C
1976 GT550 ongoing money pit.
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tz375
- Moto GP
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- Joined: Mon Nov 03, 2008 10:47 am
- Location: Illinois
Re: Heavy smoke at start up.
The irony is that early pumps had three pistons, 2 to push and 1 to draw oil in. Suzuki modified the pump and eliminated the "pull" piston.
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cl4yd0h
- On the street
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- Joined: Sun Sep 30, 2012 5:22 pm
- Country: US
- Suzuki 2-Strokes: 74 GT750L, 09 HD XR1200
Re: Heavy smoke at start up.
Great, just what I want to hear. Thanks!
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tz375
- Moto GP
- Posts: 6210
- Joined: Mon Nov 03, 2008 10:47 am
- Location: Illinois
Re: Heavy smoke at start up.
Funny how life works isn't it 
For most bikes, most of the time, the oiling system is never an issue. It's just that when it is in issue it can be annoying to fix. I procrastinated on mine because I did not want to drain the radiator and remove starter cover etc. In reality it took a lot less time to do it right than all the wasted time trying to come up with easy fixes.
One thing you could do is to get a spare Octopus and clean it out and test it and if it's good to go, swap it out and then you can clean and test the old one with almost zero down time. That leaves you one tested octopus that if it's good can be kept as a spare or sold on.
For most bikes, most of the time, the oiling system is never an issue. It's just that when it is in issue it can be annoying to fix. I procrastinated on mine because I did not want to drain the radiator and remove starter cover etc. In reality it took a lot less time to do it right than all the wasted time trying to come up with easy fixes.
One thing you could do is to get a spare Octopus and clean it out and test it and if it's good to go, swap it out and then you can clean and test the old one with almost zero down time. That leaves you one tested octopus that if it's good can be kept as a spare or sold on.
