Carburetor High Altitude Kits

High-Altitude Kits

NOTE:

Following conversion with one of these kits, the original main jet should be retained for possible future use.

If the engine is ever to be operated below the altitude specified for the new jet, the carburetor must be reconverted back to the original jet size, or overheating and internal engine damage can occur.

*altitudes are given in feet. 1,000 feet = 304.8 meters

**not emission certified

Model CS4	A/C Style Standard	Altitude* 4-8,000	Kit No. 63 755 20-S	Altitude* 8,000+	Kit No. 63 755 22-S
CS4	Heavy Duty	4-8,000	63 755 22-S	8,000+	63 755 25-S
CS6	Standard	4-8,000	63 755 21-S	8,000+	63 755 24-S
CS6	Heavy Duty	4-8,000	63 755 23-S	8,000+	63 755 26-S
CS6	Rectangular	4-8,000	63 755 24-S	8,000+	63 755 38-S
CS8.5 (250 cc)	Standard	4-8,000	63 755 27-S	8,000+	63 755 29-S
CS8.5 (250 cc)	Heavy Duty	4-8,000	63 755 28-S	8,000+	63 755 27-S
CS8.5 (300 cc)	Standard	4-8,000	Not Available	8,000+	Not Available
CS8.5 (300 cc)	Heavy Duty	4-8,000	Not Available	8,000+	Not Available
CS10 (9315 series)	Standard	4-8,000	63 755 31-S	8,000+	63 755 30-S
CS10 (9315 series)	Heavy Duty	4-8,000	63 755 33-S	8,000+	63 755 36-S
CS10 (9316 series)	Standard	4-8,000	63 755 30-S	8,000+	63 755 35-S
CS10 (9316 series)	Heavy Duty	4-8,000	63 755 33-S	8,000+	63 755 36-S
CS12 (9415 series)	Standard	4-8,000	63 755 32-S	8,000+	63 755 34-S
CS12 (9415 series)	Heavy Duty	4-8,000	63 755 30-S	8,000+	63 755 37-S
CS12 (9415 series)	Rectangular	4-8,000	63 755 31-S	8,000+	63 755 36-S
CS12 (9416 series)	Standard	4-8,000	63 755 32-S	8,000+	63 755 34-S
CS12 (9416 series)	Heavy Duty	4-8,000	63 755 30-S	8,000+	63 755 37-S

Model CH/CV11-16,	Carb. No. 12 053 10**	Carb. Mfg. Walbro	A/C Style Standard	Altitude* 5-10,000	Kit No. 12 755 68-S
CV490-492	12 053 11 12 053 13**	Walbro Walbro	Standard Standard	5-10,000 5-10,000	12 755 68-S 12 755 68-S
	12 053 16 12 053 21	Walbro Walbro	Standard Standard	5-10,000 5-10,000	12 755 68-S 12 755 68-S
	12 053 22	Walbro	Standard	5-10,000	12 755 68-S
	12 053 23	Walbro	Standard	5-10,000	12 755 68-S
	12 053 25	Walbro	Standard	5-10,000	12 755 68-S
	12 053 26	Walbro	Standard	5-10,000	12 755 68-S
	12 053 27	Walbro	Standard	5-10,000	12 755 68-S
	12 053 28	Walbro	Standard	5-10,000	12 755 68-S
	12 053 29 12 053 30	Walbro Walbro	Standard Standard	5-10,000 5-10,000	12 755 68-S 12 755 68-S
	12 053 32	Walbro	Standard	5-10,000	12 755 68-S
	12 053 39	Walbro	Standard	5-10,000	12 755 68-S
	12 053 40	Walbro	Standard	5-10,000	12 755 68-S
	12 053 77	Walbro	Standard	5-10,000	12 755 92-S
	12 053 78	Walbro	Standard	5-10,000	12 755 92-S
	12 053 80	Walbro	Standard	5-10,000	12 755 92-S
	12 053 82	Walbro	Standard	5-10,000	12 755 92-S
	12 053 93	Walbro	Standard	5-10,000	12 755 92-S
	12 053 94	Walbro	Standard	5-10,000	12 755 92-S
	12 053 95	Walbro	Standard	5-10,000	12 755 92-S
	42 053 03	Walbro	Standard	5-10,000	12 755 92-S
SV470, 480	ALL	Walbro	Standard	5-10,000	20 755 08-S
SV470, 480	ALL	Walbro	Standard	10,000+	20 755 09-S
SV530-600	ALL	Walbro	Standard	5-10,000	20 755 06-S
SV530-600	ALL	Walbro	Standard	10,000+	20 755 07-S

CH18-22 (624 cc)	24 053 31	Keihin	Standard	5-10,000	24 755 125-S
	24 053 32	Keihin	Standard	5-10,000	24 755 125-S
	24 053 33	Keihin	Standard	5-10,000	24 755 125-S
	24 053 43	Keihin	Standard	5-10,000	24 755 125-S
	24 053 75	Keihin	Standard	5-10,000	24 755 131-S
CH22, 23 (674 cc)	24 053 58	Keihin	Standard	5-10,000	24 755 125-S
	24 053 59	Keihin	Standard	5-10,000	24 755 125-S
	24 053 86	Keihin	Standard	5-10,000	24 755 131-S
CH25	24 053 34	Keihin	Standard	5-10,000	24 755 130-S
	24 053 47	Keihin	Standard	5-10,000	24 755 126-S
	24 053 75	Keihin	Standard	5-10,000	24 755 131-S
	24 053 86	Keihin	Standard	5-10,000	24 755 131-S
CH730, 740	24 053 93	Keihin	Heavy Duty	5-10,000	24 755 138-S
	24 053 93	Keihin	Heavy Duty	10,000+	24 755 137-S