Has anyone got a Mitani small fuel pump on their 4rt ? Any info would be much appreciated. Thanks.

Has anyone got a Mitani small fuel pump on their 4rt ? Any info would be much appreciated. Thanks.

Not heard of this -anymore info

If you are asking because your fuel pump won't fit into a Mitani tank then you will need modify the fuel pump bracket. There are a couple of older posts that might give you some leads on what needs to be done:

http://www.trialscentral.com/forums/topic/13178-flat-tanks/page__p__119839__hl__+fuel%20+pump#entry119839

http://www.trialscentral.com/forums/topic/14480-4rt-pump-mod/page__hl__%2Bfuel+%2Bpump

Also there used to be instructions on how to modify the fuel pump on:

http://www.montesa4rt.nl/

but looks like the site is being re-constructed, so you might need to contact the owner. He did have some very good engineering sketches.

Not heard of this -anymore info

It's a much smaller fuel pump, about half the size of the original, weighs 195g less and with the mitani/future base, hose, fuel tank, saves about 1 kg. I have a mitani flat tank and future billet base, was thinking about the fuel pump, but was hoping to get the small pump from a different source as its rather expensive

Edited July 11, 201214 yr by jj65

If you are asking because your fuel pump won't fit into a Mitani tank then you will need modify the fuel pump bracket. There are a couple of older posts that might give you some leads on what needs to be done:

http://www.trialscentral.com/forums/topic/13178-flat-tanks/page__p__119839__hl__+fuel%20+pump#entry119839

http://www.trialscentral.com/forums/topic/14480-4rt-pump-mod/page__hl__%2Bfuel+%2Bpump

Also there used to be instructions on how to modify the fuel pump on:

http://www.montesa4rt.nl/

but looks like the site is being re-constructed, so you might need to contact the owner. He did have some very good engineering sketches.

Thanks for info, but been there and done that, good bump for new 4rt owners though :0)

I'm looking to loose 3 KG off me bike for under £1 K and 5 KG off me by saving a grand in pies, drinks etc ;0).

keep us informed - have had a replacement pump of Munch for lots less than the full Honda price but not seen a smaller pump anywhere.

PS

Had the fuel pump fault occur twice but resolved by degresaing a cleaning sock filter attached to pump. Now have 2 tanks (std and flat)

and 3 pumps all functiong ok.

PPS

Have been fancying having a go at fabricating a pump base to both reduce weight and gain some fuel capacity lost by flat tank but not started yet.

Made my own flat tank from a std tank for about £40 including paint and stickers

PS

Had the fuel pump fault occur twice but resolved by degresaing a cleaning sock filter attached to pump. Now have 2 tanks (std and flat)

and 3 pumps all functiong ok.

On a side note has anyone ever been able to source a replacement filter for the pump?

Edited July 11, 201214 yr by scott_king

On a side note has anyone ever been able to source a replacement filter for the pump?

Had a quiet few hours on this project and came up a blank - Munch was also going to look into it. I thnk these filters are dual layer with a coarse outer layer and a very fine inner layer.

Had a quiet few hours on this project and came up a blank - Munch was also going to look into it. I thnk these filters are dual layer with a coarse outer layer and a very fine inner layer.

Surely these filters should be a replaceable item, or is it a case of replacing an expensive pump, just to get a clean filter?

"If I could get the serial number for the small pump"

There is nothing written on the small pump only that it is a Keihin pump, If you look in the manual at the specs of the original pump then you have all the information for selecting a replacement smaller pump, but i did not succeed in finding one.

Diam original pump 38mm, small pump 31,35mm

length org pump 82mm, small pump 70 mm

Here is the small fuel pump:

http://www.jbanyeres.com/en/depositos/136-a.html

Here is the small fuel pump:

http://www.jbanyeres.com/en/depositos/136-a.html

Yes, we know about that one and it's nice price :0(, that's why we've been trying to source another much cheaper one. Thanks anyway :0).