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For HS4 single pre waxstat carbs with red jet this is the full rebuild kit with the spindle and plain throttle disc and bushes--- see CRK227 for disc with overrun valve.
Classic Austin Mini Su Hs4 Carb Full Rebuild Kit, Plain Disc

Classic Austin Mini Su Hs4 Carb Full Rebuild Kit, Plain Disc

Classic Austin Mini Su Hs4 Carb Full Rebuild Kit, Plain Disc
Part No: CRK219
$144.95
Qty:
Fits the following:
Classic Mini
Sprite & MG Midget
Morris Minor
Alternate Products
Classic Austin Mini Su Hs4 Carb Full Rebuild Kit, Run On Disc
$147.95 Classic Austin Mini Su Hs4 Carb Full Rebuild Kit, Run On Disc
For HS4 single pre waxstat carbs with red jet this is the full rebuild kit with the spindle and plain throttle disc and bushes--- see CRK227 for disc with overrun valve.
 
 
Question:
Hi i have to identify the difference between a su hs4 plain disk and run on disk (repair kits)
Answer:

the over-run valve or "run on" valve is a smog related thing - They allow richer fuel air mix to enter the combustion chambers on sudden throttle closing.

if you look inside your carb at the throttle plate, and see a brass disc, that's the over-run valve... if you don't have one, then get the kit with the plain disc.

 
 
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