Needle, Jet(5ez74) Gsf400 1993 (p) (e02 E04 E16 E21 E22 E25 E30 E34 E53)

Old carburettors are problematic (or can be); they wear internally, with a coat of "varnish" being deposited over the years on the inside surfaces making them difficult to balance, leading to sub-standard performance and poor starting.
In an ideal world, you would simply fit brand new carb assemblies. But, the world not being ideal, the cost of NOS (new old stock) carburettors can be prohibitively expensive; assuming you can get hold of them?
The realistic and much cheaper alternative to new carbs is to strip the old items, getting the internals sonically cleaned, and the bodies vapor blasted to restore a pleasing finish.
This can be complimented with new internal and external components like diaphragms, valves, jets, air screws and springs, plus any other parts that are worn, damaged or corroded, both for sound mechanical and cosmetic purposes.
You may also wish to check out the carb related components listed below:

1350732C00
1350132C00
1335734C00
1341710D00
1338310D00
1338333D00
0831022086
0831022083
0832131086
0832131083
1357317C00
1357310D00
1355032C40
1355032C00
1355032C50
1355032C10
1355317C00
1355344B00
1357332C10
1357310D10
1355032C70
1355032C30
1355110D00
1355110D10
1355146D00
0949232006
0949400711
0949400744
0949400790
0949400710
0949400792
0949120017
0949121016
1324723A00
1325010D00
1355032C60
1355032C20
1357432C10
1350232C00
1350210D00
1357432C00
1341110D00
0949329002
1326710D00
1326010DV0
1341332C00
1362832C10
1362832C00
1368334C10
0935290133600
1368532C00
1368334C00
1368434C00
1360205148
1360105148
1326817C10
1369232C20
1369232C30

Order new gaskets 1325844B00 and seals 1355644B00 1350917C00 1337446710 at the same time?

This component may have other applications within the Suzuki model range - so please ensure you order the correct part-number for your model.