Hello.
Am I reading this correctly?
Does the 500j have odd needles? P4 in left & p5 in the right.
If this is so. Can anyone please explain why.
And why it is only on the J model?
Your thoughts appreciated as always.
Sean.
T500j needles.
Moderators: oldjapanesebikes, H2RICK, diamondj, Suzsmokeyallan
-
Steve zodiac
Re: T500j needles.
Surely somebody on here must know about the T500j carb needles.
Sean.
Sean.
-
jabcb
- Moto GP
- Posts: 4310
- Joined: Mon Dec 13, 2010 4:32 pm
- Country: USA
- Suzuki 2-Strokes: 69 T350 thru 75 GT750
- Location: southwestern Pennsylvania
Re: T500j needles.
The carb specs are in service bulletin Specification-6
http://www.ozebook.com/compendium/techb ... %206-9.pdf
1971: both P-5
1972: P-5 & P-4
1973—1975: both P-4
Early T500s used a paper air filter & later models used a mesh filter.
There also was a cylinder porting change, but I’m not sure of the details.
The triples had slightly different jetting for the center cylinder due to the 3-into-4 exhaust.
Am not a carb expert, so I have no insight into why different jets were used in the 72 T500.
http://www.ozebook.com/compendium/techb ... %206-9.pdf
1971: both P-5
1972: P-5 & P-4
1973—1975: both P-4
Early T500s used a paper air filter & later models used a mesh filter.
There also was a cylinder porting change, but I’m not sure of the details.
The triples had slightly different jetting for the center cylinder due to the 3-into-4 exhaust.
Am not a carb expert, so I have no insight into why different jets were used in the 72 T500.
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
-
johnakay
- I likes them jubblies
- Posts: 2365
- Joined: Wed Oct 15, 2008 11:19 am
- Country: UK
- Suzuki 2-Strokes: bike
Re: T500j needles.
later models used a mesh filter.?
you mean foam.
I've had the M'GT models and they had foam no mesh.
you mean foam.
I've had the M'GT models and they had foam no mesh.
If I wanted to make a life-long career out of
working with the mentally retarded I would
have opened a Harley Davidson Dealership
working with the mentally retarded I would
have opened a Harley Davidson Dealership
-
jabcb
- Moto GP
- Posts: 4310
- Joined: Mon Dec 13, 2010 4:32 pm
- Country: USA
- Suzuki 2-Strokes: 69 T350 thru 75 GT750
- Location: southwestern Pennsylvania
Re: T500j needles.
Correct. I meant the foam filter when I said mesh filter.
BAS (Bike Acquisition Syndrome) - too many bikes but have room for more
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
Suzuki:
GT750 2x75
GT550 72 & 75
GT380 72
T500 69 project & 73 project
T350 69 & 71
Honda 85 CB650SC & 86 CB700SC
09 Triumph Bonneville SE
-
johnakay
- I likes them jubblies
- Posts: 2365
- Joined: Wed Oct 15, 2008 11:19 am
- Country: UK
- Suzuki 2-Strokes: bike
Re: T500j needles.
not ta worry even I get it wrong some times.
rarely though
If I wanted to make a life-long career out of
working with the mentally retarded I would
have opened a Harley Davidson Dealership
working with the mentally retarded I would
have opened a Harley Davidson Dealership
-
ConnerVT
- Novice racer
- Posts: 963
- Joined: Wed Jan 18, 2012 8:01 pm
- Country: USA
- Suzuki 2-Strokes: T500R (now), T500M (40 yrs ago)
- Location: North of Albany, NY
Re: T500j needles.
Late to the party.
Nothing mechanical really changed between 1971 and 1973. Engine itself, intake runners, air box and filter all stayed the same.
My feeling is that Suzuki was just trying to figure out their homopressure carbs, and just couldn't get them to play nice. I've gone through several dozen combinations of jets, needles, needle jets, shimming needles, etc. and have only come up with a best compromise for how I ride. Never 100%.
I believe that's why Suzuki made the wholesale changes in 1974 - going back to a conventional atmospheric vented carb, with changes to the cylinder, intakes, and air box/filter. They just couldn't get it to work.
Nothing mechanical really changed between 1971 and 1973. Engine itself, intake runners, air box and filter all stayed the same.
My feeling is that Suzuki was just trying to figure out their homopressure carbs, and just couldn't get them to play nice. I've gone through several dozen combinations of jets, needles, needle jets, shimming needles, etc. and have only come up with a best compromise for how I ride. Never 100%.
I believe that's why Suzuki made the wholesale changes in 1974 - going back to a conventional atmospheric vented carb, with changes to the cylinder, intakes, and air box/filter. They just couldn't get it to work.
