armyofda12mnkeys Posted March 6, 2011 Share Posted March 6, 2011 Just curious, i lost one of the rubber 'round' gasket part that goes behind the Float Gasket... Pic attached... I didnt see it anywhere on yamaha's offical parts: http://www.boats.net/parts/search/Yamaha/Motorcycle/1978/XS400E/CARBURETOR/parts.html Is this part terribly important and if so, where do I buy it ? Link to comment Share on other sites More sharing options...
Moderator drewpy Posted March 6, 2011 Moderator Share Posted March 6, 2011 Just curious, i lost one of the rubber 'round' gasket part that goes behind the Float Gasket... Pic attached... I didnt see it anywhere on yamaha's offical parts: http://www.boats.net/parts/search/Yamaha/Motorcycle/1978/XS400E/CARBURETOR/parts.html Is this part terribly important and if so, where do I buy it ? never seen that before! you do have a missing brass washer that goes under the main screw though! Link to comment Share on other sites More sharing options...
armyofda12mnkeys Posted March 6, 2011 Author Share Posted March 6, 2011 never seen that before! you do have a missing brass washer that goes under the main screw though! hah, interesting.. would there be any side effects of a missing washer during bike operation? Also would you suggest removing the black round gasket? it was on both 1978 XS400 carbs, but then again you have the same bike I remembered, so If you dont have it and the bike is fine. Then I can get rid of it i guess -Arian Link to comment Share on other sites More sharing options...
Moderator drewpy Posted March 6, 2011 Moderator Share Posted March 6, 2011 hah, interesting.. would there be any side effects of a missing washer during bike operation? Also would you suggest removing the black round gasket? it was on both 1978 XS400 carbs, but then again you have the same bike I remembered, so If you dont have it and the bike is fine. Then I can get rid of it i guess -Arian get rid (but keep it JIC) that missing brass washer, seals the gaps between the alloy body and the screw. If it were not needed, yamaha woudn't have spent money on it being there! Link to comment Share on other sites More sharing options...
armyofda12mnkeys Posted March 6, 2011 Author Share Posted March 6, 2011 get rid (but keep it JIC) that missing brass washer, seals the gaps between the alloy body and the screw. If it were not needed, yamaha woudn't have spent money on it being there! cool , where do you buy the washer? i saw it discontinued if its item #11 on diagram: http://www.boats.net/parts/search/Yamaha/Motorcycle/1978/XS400E/CARBURETOR/parts.html Link to comment Share on other sites More sharing options...
kindest Posted March 7, 2011 Share Posted March 7, 2011 cool , where do you buy the washer? i saw it discontinued if its item #11 on diagram: http://www.boats.net/parts/search/Yamaha/Motorcycle/1978/XS400E/CARBURETOR/parts.html do you have a Mikuni BS34 carb? if so mikexs has it for 1 dollar. http://www.mikesxs.net/products-38.html#products your carbs are nice and clean. do you have to replace the carb gasket when you open the carbs up? Link to comment Share on other sites More sharing options...
armyofda12mnkeys Posted March 7, 2011 Author Share Posted March 7, 2011 do you have a Mikuni BS34 carb? if so mikexs has it for 1 dollar. http://www.mikesxs.net/products-38.html#products your carbs are nice and clean. do you have to replace the carb gasket when you open the carbs up? thanks! I forgot about MikesXS BS34 parts . I have an extra carb I'll use as a backup from a 77 thats just as nice. Ive opened it a few times with no problem with the float gaskets as they are pretty thick/tough. My electric ignition xs400 cafe racer ran well the first year, thanks again to kmac and drewpy for helping. Im gonna maybe ask someone to weld some custom brackets for some new Dyna Coils i bought, as kmac figured the correct coils to use and seemed to run well. Link to comment Share on other sites More sharing options...
armyofda12mnkeys Posted March 7, 2011 Author Share Posted March 7, 2011 PS is this the missing washer you thought wasnt there drewpy? Its recessed into the carb main jet hole on both sides. Seems like should be there? So its under the Main jet screw... but i guess you were talking about the other screw in first pic i posted (aka #13 in diagram vs #10 which is Main jet screw) Anyway let me know if i still need a washer under that screw . Link to comment Share on other sites More sharing options...
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