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GT750A Oily Middle Plug

Posted: Mon Apr 15, 2019 10:17 pm
by GTNelly
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!

Re: GT750A Oily Middle Plug

Posted: Mon Apr 15, 2019 10:25 pm
by BAZ
Go for a long ride high speed at light throttle before worrying. large throttle pumps to much oil in.

Re: GT750A Oily Middle Plug

Posted: Mon Apr 15, 2019 10:52 pm
by Alan H
GTNelly wrote: Or should I just go and give it a good thrash?
Gerronwi'it. Jer need a white stick anorl?

Re: GT750A Oily Middle Plug

Posted: Tue Apr 16, 2019 5:37 am
by PaulD738
Alan H wrote: Gerronwi'it. Jer need a white stick anorl?
Always a caring helpful chap is our Al :roll:

Re: GT750A Oily Middle Plug

Posted: Tue Apr 16, 2019 8:51 am
by barney01
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.

Re: GT750A Oily Middle Plug

Posted: Tue Apr 16, 2019 6:24 pm
by GTNelly
Thanks for the replies

Think a thrash is in order first

How would I check the SRIS valve is working?

Re: GT750A Oily Middle Plug

Posted: Tue Apr 16, 2019 6:27 pm
by BAZ
When you refit don't overtighten they are delicate...not a major problem if blocked some owners do that deliberately..

Re: GT750A Oily Middle Plug

Posted: Tue Apr 16, 2019 7:23 pm
by barney01
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.

Re: GT750A Oily Middle Plug

Posted: Tue Apr 16, 2019 7:27 pm
by GTNelly
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?

Re: GT750A Oily Middle Plug

Posted: Tue Apr 16, 2019 7:49 pm
by mizzytheman
With a spanner. :roll:

Sorry couldn’t resist.