Author Topic: Suzuki gt550 Smoking Issue  (Read 322 times)

Offline Jalexa66

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Suzuki gt550 Smoking Issue
« on: May 29, 2020, 02:03:12 AM »
Hi All,

I recently purchased a restored Suzuki GT550 1974, I dont know how far the engine was reconditioned, it all looks good but there is a problem as follows:

Under hard acceleration there is alot of smoke, when crusing at 80kmh there is no smoke, but if crusing at 100kmh under that bit more load there is constant smoke?

I have inspected the spark plugs and they are reasonable.
I have also reset the oil pump as per the manual ( it was initially set to high)
The bike has electronic ignition which I have also set correctly.

Has anyone come across this issue previously, or advice on what to check next?

Thanks

John

Offline R

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Re: Suzuki gt550 Smoking Issue
« Reply #1 on: May 29, 2020, 02:13:27 AM »
How far have you run this ?
Checked your transmission oil lately ?

If you google this problem, there are a LOT of similar cases.
Leaky seals from the transmission is one, 2 stroke oil settling
in the crankcases and taking a long time to burn out is another.
Not knowing the full history is none too helpful either...
Good luck.

Offline Rex

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Re: Suzuki gt550 Smoking Issue
« Reply #2 on: May 29, 2020, 09:38:38 AM »
I had an RD250 way back when, and it used to smoke badly if I gave it some wellie. The penny didn't drop until I found the transmission oil was all gone..

Offline john.k

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Re: Suzuki gt550 Smoking Issue
« Reply #3 on: June 02, 2020, 03:17:22 AM »
The exhaust pipes and mufflers may be full of oil too.

Offline 33d6

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Re: Suzuki gt550 Smoking Issue
« Reply #4 on: June 02, 2020, 06:57:34 AM »
Probably are.
Takes a while for new owners to appreciate you have to ride the bike for quite a few miles for both the engine and the complete exhaust system to get up to operating temperature and blow out the excess oil. They load up surprisingly quickly in stop /start traffic or if only ridden commuter distances. Will then need a good ride to blow away the cobwebs and may lay down a Royal Navy quality smoke screen for a few miles while doing so.
The effect is magic. De-clagging the exhaust gives much the same result as a major engine tune up. You really notice the difference (and the engine stops smoking).