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Voltaire
11th February 2019, 12:48
Hi KB brains trust.

I took the pump and filter out of my CARB'ed 900 tank to check for rust and POR 15 it.

Question: its got a conventional plastic filter, are the FI alloy canister ones the same or as the pumps have less pressure on carbs different?

Thinking the FI might have greater resistance for the puny pump.
layton
11th February 2019, 17:42
Been awhile, but from memory the fuel injected monster I had, the part number was the same for some alfa Romeos, the older ones are carbed
sidecar bob
11th February 2019, 18:08
My former classic BMW sidecar uses a EFI fuel filter with no problem, so does my fluro green classic BMW solo with gravity feed.
I've always used steel bodied EFI filters on race bikes for obvious reasons with no issues.
Voltaire
11th February 2019, 19:39
Ta.

Its not a 5 minute job changing an in tank filter.

I suppose the FI ones are rated at a higher pressure ( for obvious reasons)
Laava
11th February 2019, 21:34
Ta.

Its not a 5 minute job changing an in tank filter.

I suppose the FI ones are rated at a higher pressure ( for obvious reasons)
If the fuel is sucked through the filter first, as on my multi, then it makes no difference what pressure the pump is surely?
Voltaire
12th February 2019, 06:53
If the fuel is sucked through the filter first, as on my multi, then it makes no difference what pressure the pump is surely?

Fuel goes thru the pump first, then the filter on a carb version. The pump has a gauze mesh filter on it.
nodrog
12th February 2019, 07:05
Ta.

Its not a 5 minute job changing an in tank filter.

I suppose the FI ones are rated at a higher pressure ( for obvious reasons)

The FI ones have a higher filtration level (like down to 10 microns) so the injectors don't get blocked.

I can't see there being any problem running them with carbs.
OddDuck
12th February 2019, 07:09
I've got an EFI filter installed in the carb'd 900SS - no issues from the filter (still chasing goblins elsewhere though...)

There wasn't any noticeable difference in the volume of fuel coming back on the return line so I don't think there's any significant flow difference between the filters. Haven't done a stopwatch and bucket test though.
Voltaire
12th February 2019, 08:15
I've got an EFI filter installed in the carb'd 900SS - no issues from the filter (still chasing goblins elsewhere though...)

There wasn't any noticeable difference in the volume of fuel coming back on the return line so I don't think there's any significant flow difference between the filters. Haven't done a stopwatch and bucket test though.

I chased the goblins into a box and put a rebuilt set of Mikunis on.:lol:

Sounds like a FI one will do the job.
Voltaire
12th February 2019, 19:47
Got an EFI filter but then discovered that you need submersible fuel line. So off to Greenlane Speed shop ( in Penrose) to get that.
All back together for test run.:banana:
nodrog
13th February 2019, 06:25
Got an EFI filter but then discovered that you need submersible fuel line. So off to Greenlane Speed shop ( in Penrose) to get that.
All back together for test run.:banana:

I'm confused, did it not have fuel line already?
Voltaire
13th February 2019, 10:24
I'm confused, did it not have fuel line already?

The pump/filter/tank are coupled up with short approximately 50mm lengths of 5/16 fuel line. The original ones were probably 1993 vintage.
you need special fuel hose that resists fuel if submersed in fuel.
The external fuel lines were previously replaced by me and are ok
Hopefully that clears it up for you.:2thumbsup

Next on to brake lines....