jj65 Posted July 9, 2012 Report Share Posted July 9, 2012 Has anyone got a Mitani small fuel pump on their 4rt ? Any info would be much appreciated. Thanks. Quote Link to comment Share on other sites More sharing options...
jimmyl Posted July 9, 2012 Report Share Posted July 9, 2012 Has anyone got a Mitani small fuel pump on their 4rt ? Any info would be much appreciated. Thanks. Not heard of this -anymore info Quote Link to comment Share on other sites More sharing options...
barfy Posted July 10, 2012 Report Share Posted July 10, 2012 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. Quote Link to comment Share on other sites More sharing options...
jj65 Posted July 11, 2012 Author Report Share Posted July 11, 2012 (edited) 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, 2012 by jj65 Quote Link to comment Share on other sites More sharing options...
jj65 Posted July 11, 2012 Author Report Share Posted July 11, 2012 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). Quote Link to comment Share on other sites More sharing options...
jimmyl Posted July 11, 2012 Report Share Posted July 11, 2012 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 Quote Link to comment Share on other sites More sharing options...
scott_king Posted July 11, 2012 Report Share Posted July 11, 2012 (edited) 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, 2012 by scott_king Quote Link to comment Share on other sites More sharing options...
jimmyl Posted July 12, 2012 Report Share Posted July 12, 2012 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. Quote Link to comment Share on other sites More sharing options...
shedracer Posted July 12, 2012 Report Share Posted July 12, 2012 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? Quote Link to comment Share on other sites More sharing options...
fantic303 Posted July 12, 2012 Report Share Posted July 12, 2012 "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 Quote Link to comment Share on other sites More sharing options...
guys Posted November 1, 2012 Report Share Posted November 1, 2012 Here is the small fuel pump: http://www.jbanyeres.com/en/depositos/136-a.html Quote Link to comment Share on other sites More sharing options...
jj65 Posted November 2, 2012 Author Report Share Posted November 2, 2012 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). Quote Link to comment Share on other sites More sharing options...
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