Friend of mine recently rebuilt his 1275 A+ and had it bored +.060". The pistons are Swiftune shallow dish with the offset dish. As noted the carb is an HIF6. The header is a long center branch of unknown origin.
The question is, is the HIF 6 carb too big for his engine?
The reason for the question is that with the K&N filter removed the engine runs extremely lean and is down on power. With the air filter on it runs rich but has plenty of power.
1328 Cc With Hif 6 Carb
Started by
Aridgerunner
, Today, 01:18 AM
3 replies to this topic
#1
Aridgerunner
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Mini Mad
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Posted Today, 01:18 AM
#2
timmy850
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Up Into Fourth
- Location: NSW, Australia
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Posted Today, 01:56 AM
HIF6 is a great size for a 1275
It sounds like it needs a good tune up
#3
Steam
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One Carb Or Two?
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Posted Today, 06:41 AM
And possibly the correct needle.
That engine would run on a hs4 ,just. A hs6 or hif44 puts the sweet spot in the middle of the carbies range rather than at is upper edge as it would be with a hs4.
That engine would run on a hs4 ,just. A hs6 or hif44 puts the sweet spot in the middle of the carbies range rather than at is upper edge as it would be with a hs4.
#4
nicklouse
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Moved Into The Garage
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Posted Today, 07:46 AM
Most likely a poor filter.
pictures of the whole set up will help.
personally I would use a HIF44 but the 6 is so similar it should not matter.
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