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 Post subject: Suzuki GT500
PostPosted: Sun Mar 29, 2020 4:49 am 
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On the street

Joined: Sun Feb 23, 2020 3:44 pm
Posts: 17
Country: Uk
Suzuki 2-Strokes: Gt500 / 1976
Hi just started my GT500 after full restoration .
Carbs were ultrasonic cleaned and new jets fitted . However it runs fine on choke , but when comes off choke it slowly dies on won’t tick over .
Also how do you get the center stand spring onto the stand ? It’s an absolute ##%##


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 Post subject: Re: Suzuki GT500
PostPosted: Sun Mar 29, 2020 9:32 am 
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Joined: Sat Sep 05, 2015 3:14 pm
Posts: 252
Location: southeast pa
Country: us
Suzuki 2-Strokes: GT
When you say new jets fitted, did you replace with mikuni jets or aftermarket? some aftermarket jets will give you trouble.
If it runs on choke but not without, it is probably a problem with idle/pilot circuit, clogged or restricted.
If I remember correctly it is easier to put the spring on when the stand is up. It is much easier if mufflers removed allowing stand to go up even more.

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76 GT185
77 GT250
77 GT380
76 GT500
73 GT550
73 GT750
74 GT750
71 T250 scrambler
75 T500 cafe


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 Post subject: Re: Suzuki GT500
PostPosted: Mon Mar 30, 2020 10:27 am 
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On the street

Joined: Sun Feb 23, 2020 3:44 pm
Posts: 17
Country: Uk
Suzuki 2-Strokes: Gt500 / 1976
Thanks for info , i think they were aftermarket .....Damm . Looks like it’s carbs off again .


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 Post subject: Re: Suzuki GT500
PostPosted: Mon Mar 30, 2020 2:21 pm 
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Joined: Sat Sep 05, 2015 3:14 pm
Posts: 252
Location: southeast pa
Country: us
Suzuki 2-Strokes: GT
I spray carb cleaner and air through all the passages and jets to check flow, sometimes it takes me several cleanings to get clear

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76 GT185
77 GT250
77 GT380
76 GT500
73 GT550
73 GT750
74 GT750
71 T250 scrambler
75 T500 cafe


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 Post subject: Re: Suzuki GT500
PostPosted: Tue Mar 31, 2020 7:15 pm 
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Still in the Driveway

Joined: Sat Oct 08, 2016 7:15 pm
Posts: 5
Country: United States
Suzuki 2-Strokes: t500j gt500 76 t250 71
Springs are easy,, Put one end in vise hook a piece of chain hanging to the floor. Stand on chain to stretch out spring, install washers or pennys between coils. install spring and remove washers.


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 Post subject: Re: Suzuki GT500
PostPosted: Wed Apr 01, 2020 12:48 pm 
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On the street

Joined: Sun Feb 23, 2020 3:44 pm
Posts: 17
Country: Uk
Suzuki 2-Strokes: Gt500 / 1976
Brilliant that worked so easy ......thanks


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 Post subject: Re: Suzuki GT500
PostPosted: Thu Apr 09, 2020 1:28 pm 
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On the street

Joined: Sun Feb 23, 2020 3:44 pm
Posts: 17
Country: Uk
Suzuki 2-Strokes: Gt500 / 1976
Hi ultrasonic cleaned the carbs again , put carb cleaner thro them , blew all out with compressed air and fitted all new Mikuni jets .
Bike now runs better on choke , will hold off choke for about 20 secs then starts spitting or hissing until it dies........ ideas ?


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 Post subject: Re: Suzuki GT500
PostPosted: Thu Apr 09, 2020 2:42 pm 
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Joined: Sat Sep 05, 2015 3:14 pm
Posts: 252
Location: southeast pa
Country: us
Suzuki 2-Strokes: GT
Is this after warmed up? Does it run ok when on throttle? my GT500A doesn't like idling until warm, I need to blip the throttle to keep running till warm.
Did you take it for a run? sometimes it helps to give it a good run.

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76 GT185
77 GT250
77 GT380
76 GT500
73 GT550
73 GT750
74 GT750
71 T250 scrambler
75 T500 cafe


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 Post subject: Re: Suzuki GT500
PostPosted: Fri Apr 10, 2020 5:51 am 
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On the street

Joined: Sun Feb 23, 2020 3:44 pm
Posts: 17
Country: Uk
Suzuki 2-Strokes: Gt500 / 1976
Hi started bike this morning . Ran ok on choke , misfired on idle but ran for 5 or so minutes .
Then revs went mad......wouldn’t stop . Turned bike off , pulled spark plug caps off ......still screaming away .........turned fuel off .......still wouldn’t stop . In the end undid a spark plug and it stopped .
Spark plug was white when removed .........any help


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 Post subject: Re: Suzuki GT500
PostPosted: Fri Apr 10, 2020 7:29 am 
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Joined: Mon Oct 24, 2016 12:35 pm
Posts: 195
Location: Macon, GA
Country: USA
Suzuki 2-Strokes: 76 GT750, 72 H2 750, 84 RZ350, 67 YR1, 82 MB5
I’d check throttle cable routing from throttle tube to carbs including free play needed at both ends. Usually easier to do and see with fuel tank removed. Have you lubed them recently?

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1976 Suzuki GT750 (Maui Blue), 1972 Kawasaki H2 750 Mach IV (Candytone Blue), 1984 Yamaha RZ350 (KRR- Yellow/ Black).


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 Post subject: Re: Suzuki GT500
PostPosted: Fri Apr 10, 2020 7:41 am 
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On the street

Joined: Sun Feb 23, 2020 3:44 pm
Posts: 17
Country: Uk
Suzuki 2-Strokes: Gt500 / 1976
Yeah throttle cable ok and really free and smooth .Both ends have free play .


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 Post subject: Re: Suzuki GT500
PostPosted: Fri Apr 10, 2020 11:18 am 
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On the main road
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Joined: Mon Oct 24, 2016 12:35 pm
Posts: 195
Location: Macon, GA
Country: USA
Suzuki 2-Strokes: 76 GT750, 72 H2 750, 84 RZ350, 67 YR1, 82 MB5
Carb slides in correctly and not sticking as checked with engine off?

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1976 Suzuki GT750 (Maui Blue), 1972 Kawasaki H2 750 Mach IV (Candytone Blue), 1984 Yamaha RZ350 (KRR- Yellow/ Black).


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 Post subject: Re: Suzuki GT500
PostPosted: Fri Apr 10, 2020 11:58 am 
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To the on ramp

Joined: Sat Sep 05, 2015 3:14 pm
Posts: 252
Location: southeast pa
Country: us
Suzuki 2-Strokes: GT
Pmd31421 wrote:
turned fuel off

Just curious how you turned the fuel off, do you have a manual shutoff?
Sounds like it could be an air leak on intake boots or carbs.
Another way to kill is to put in gear and release clutch while holding brake, stall it.

_________________
76 GT185
77 GT250
77 GT380
76 GT500
73 GT550
73 GT750
74 GT750
71 T250 scrambler
75 T500 cafe


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 Post subject: Re: Suzuki GT500
PostPosted: Fri Apr 10, 2020 4:51 pm 
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On the street

Joined: Sun Feb 23, 2020 3:44 pm
Posts: 17
Country: Uk
Suzuki 2-Strokes: Gt500 / 1976
Hi , I turned ignition and kill switch off . Pulled off spark plug caps . Disconnected petrol pipes from fuel tap so no fuel was going into carbs . It was still screaming at full revs. Never thought about sticking it in gear "..........I undid one spark plug and it stopped running


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 Post subject: Re: Suzuki GT500
PostPosted: Fri Apr 10, 2020 7:30 pm 
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To the on ramp

Joined: Sat Sep 05, 2015 3:14 pm
Posts: 252
Location: southeast pa
Country: us
Suzuki 2-Strokes: GT
I would look for air leaks or partial restriction in carbs. sounds like a lean mixture issue. Float height set right ?
My GT550 ran away, that's how I know about putting in gear to stall.

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76 GT185
77 GT250
77 GT380
76 GT500
73 GT550
73 GT750
74 GT750
71 T250 scrambler
75 T500 cafe


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