GT750A Oily Middle Plug

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GTNelly
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Joined: Sun Oct 14, 2018 9:37 pm

GT750A Oily Middle Plug

Postby GTNelly » Mon Apr 15, 2019 10:17 pm

Just got my GT750A back on the road after a 5 year lay off

Started and runs just fine but noticed that while the outer spark plugs are a nice light brown colour the middle plug is wet/oily

In addition the middle exhaust to head clamp was a bit loose and oil was running down the front of the engine

I've now fixed the exhaust seal to the engine but where else should I be looking?

Or should I just go and give it a good thrash?

Thanks!

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BAZ
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Location: Dudley west midlands
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Re: GT750A Oily Middle Plug

Postby BAZ » Mon Apr 15, 2019 10:25 pm

Go for a long ride high speed at light throttle before worrying. large throttle pumps to much oil in.

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Alan H
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Re: GT750A Oily Middle Plug

Postby Alan H » Mon Apr 15, 2019 10:52 pm

GTNelly wrote:Or should I just go and give it a good thrash?

Gerronwi'it. Jer need a white stick anorl?
Proof that four strokes are over complicated

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PaulD738
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Location: Warrington Cheshire

Re: GT750A Oily Middle Plug

Postby PaulD738 » Tue Apr 16, 2019 5:37 am

Alan H wrote:Gerronwi'it. Jer need a white stick anorl?


Always a caring helpful chap is our Al :roll:
There rubbish them Jap bikes lad they won't last five minutes! you want to get yourself a nice Royal Enfield!
A quote from my old dad 8-)
1981 GSX1100 Katana Pussy Galore (the blunderbuss)
1973 T500K Dobbin (the rapier)
Seeley T500 race bike

barney01
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Location: Prestatyn.Wales

Re: GT750A Oily Middle Plug

Postby barney01 » Tue Apr 16, 2019 8:51 am

Might be worth whipping out the SRIS valve and check it's not blocked and keeping the waste oil in the bottom of the crankcase.

GTNelly
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Joined: Sun Oct 14, 2018 9:37 pm

Re: GT750A Oily Middle Plug

Postby GTNelly » Tue Apr 16, 2019 6:24 pm

Thanks for the replies

Think a thrash is in order first

How would I check the SRIS valve is working?
Last edited by GTNelly on Tue Apr 16, 2019 6:27 pm, edited 1 time in total.

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BAZ
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Re: GT750A Oily Middle Plug

Postby BAZ » Tue Apr 16, 2019 6:27 pm

When you refit don't overtighten they are delicate...not a major problem if blocked some owners do that deliberately..

barney01
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Location: Prestatyn.Wales

Re: GT750A Oily Middle Plug

Postby barney01 » Tue Apr 16, 2019 7:23 pm

If you remove the valve soak it in petrol then wipe it and blow into the valve (big hole side) then suck and you should hear/ feel the valve opening and closing. As Baz says it won't stop the engine working but may account for excess oil in the cylinder if the valve is stuck shut.

GTNelly
Posts: 20
Joined: Sun Oct 14, 2018 9:37 pm

Re: GT750A Oily Middle Plug

Postby GTNelly » Tue Apr 16, 2019 7:27 pm

Just taken a look at the bike and the valves are buried deep in the crankcase behind exhausts

What's the best way to remove them?

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mizzytheman
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Re: GT750A Oily Middle Plug

Postby mizzytheman » Tue Apr 16, 2019 7:49 pm

With a spanner. :roll:

Sorry couldn’t resist.


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