Thu, 27 May 1999 11:22:24 PDT - Message No. 5773
From: "alan richard csizmazia"

Subject: Re: Fuel Pumps !!


RD07 1997 17000 KM

I found a replacement pump for the Honda unit.

Maybe we should start a separate club for @'s with fuel pump problems.
I dont think I'm alone on this one.
My fuel pump has stopped completely.
First I try to repair.
The pump is a diaphragm type with a crude electromagnetic mechanism like a 
bell or buzzer which uses a pair of contacts;
Contacts closed - magnet energises - diaphragm shaft goes up - opens the 
contact - magnet de-energises - diaphragm shaft goes down - closes the 
contact - and so on.
The contacts on my pump had been 'welded' closed for some time & then had 
broken open.
I replaced the contacts with a pair from an old set of ignition points, the 
repair worked but not so good.
There is a very strong spark between the contacts, & they would burn away in 
a short time.
( If the pump diaphragm ever breaks, the fuel leaks to the back of the pump 
& drains away through a rubber pipe below the bike - OK, except that the 
back of the pump looks like a mini-cylinder complete with spark plug ! )
I checked Honda for the new price; UK£ 145. maybe even tax on top of that. I 
was so shocked I didn't hear it properly.
But I did find (& bought & fitted )from a car shop, an aftermarket fuel 
pump;
The pump is made by a UK firm 'Moprod' type FP502E. It cost me UK£ 37 from 
Motorworld in Loughborough, Leicestershire (If thats any use to anyone)
MOPROD's address is;
                  Bermuda Road
                  Nuneaton
                  CV10 7QQ
                  England

The pump is a diaphragm type, but with electronic control. It has a plastic 
body, is a little shorter but a little fatter than Honda's but fits in the 
same rubber mounting (just! - it needs to go on back to front, or left to 
right, the rubber slots want to be on the frame side of the fuel pumps 
centreline - It's easier to do it than explain it - you'll figure it out)
The pipe spigots on the pump are only 8MM dia. The @ pump has 10MM dia. so 
you need a bit of tube or something as a sleeve, they stick out sideways 
instead of straight, The pipe to the tank should be longer & the one to the 
carbs should be shorter, but it all fits in there.
You need to extend/replace the cable & put the Honda connector on. I put a 
layer of hot melt glue over the cover of the electrics to seal it.
So far so good, but only 20 KM so early days yet. I'l let you know after 
1000 KM.

If you're stuck, you don't need a fuel pump (almost)
You take the carburetor pipe off the fuel pump & push it onto the fuel 
filter.(Don't fill your boots with fuel doing this!)
With a full tank of fuel & gentle throttle hand you will get home.
If you ride hard, or the fuel gets low (lower than carb. level) the bike 
starves.

But this does not solve the problem. The problem is Honda's fuel pump,
This is happening to too many people now.
My bike is s/hand Euro. import so Honda UK are not interested.

Love from

Alan.


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