XS650: Pod Air Filters   3 comments

I lightened down my bike considerably. All the electrics went. Run batteryless. Removed the air-boxes. Left the whole section under the seat empty.

Looks cool. No good for the motor.

Had a pair of el-cheapo pods lying around. More or less the right diameter, according to the label. After fitting I decided I could do better:

 

1 .. now how are you supposed to get a good seal there? ... also see the cracking along the edges - this was new out of the bag!!

now how are you supposed to get a good seal there? … also see the cracking along the edges – this was new out of the bag!!

 

2 .. big inner lip ... everything restricted ... diaphragm vacuum port at the top: pilot air jet-lower left: main and mid range air jet-lower right: bowl vents in the middle

big inner lip … everything restricted … diaphragm vacuum port at the top: pilot air jet-lower left: main and mid range air jet-lower right: bowl vents in the middle

 

3 .. these filters had never been used

these filters had never been used

 

4 .. was then given, under protest, a set of these

was then given, under protest, a set of these

 

5 .. larger surface area

larger surface area

 

6 .. no restricting step

no restricting step

 

7 .. very thin walled ... rubber may not hold up esp. with no support...wonder how long it will last...is the rubber ethanol proof?

very thin walled … rubber may not hold up esp. with no support … wonder how long it will last … is the rubber ethanol proof?

 

  • very thin
  • where-ever you look the filter wants to break out of the rubber
  • see the large hole in the flange lip? WTF?
  • strong enough to hang unsupported?
  • ethanol proof?

Not an optimal solution. But heaps better. Will have a look around for a K n N to compare.

When I think about it I guess I should add here that pods generally increase engine breathing capacity. The immediate effect is to lean the carb mix. More air, less gas. Pistons and valves don’t like this. Get a little intimate with your carbs. Odds are you may have to massage your jetting.

Reading will tell you. Chop those plugs.

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3 responses to “XS650: Pod Air Filters

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  1. Guess you can”t go cheap on pods.

  2. The K&N style filters have been known to cause turbulant and inconsistent airflow, which can be a huge problem on the stock cv carbs, causing slide fluttering. Try the Australian Unipods. Supposedly, they are a better option.

  3. Seems to me the bigger problem with increasing airflow and the resultant inconsistencies is the lack of vaccuum creating when removing the airboxes (the K&N filter fitted into the original airbox on my SR500 sidecar functions well) … we used to fit shrouds around exposed filters on our motocross bikes to combat flow problems and slide fluttering
    Since writing this post I have thrown the Mikesxs filters (total Junk imho) and fitted Unipods – required a little jet massage, but also gave some problems with flow … must say I like the layout of the aussie Uniflow site – more informative than the US Uni Filter site

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