dtmf
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Posts posted by dtmf
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heh i broke 2 picks trying to get it out. I did pick up some more screwdrivers today.. gonna attack it again tommorow this time with a male. if anything we will destroy it in the process.
use a small flatblade screwdriver to hold it in place to keep it from spining , than use a pick tool to pry it out . that's what i did . if it's rusty and nasty than give it a spray with some WD40
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ive had my XS400RJ pop up once when i down shifted from 2nd to 1st then gunned it WOT . i cant say it was fun tho
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Chris, I will try to check the plugs as you stated, and see what that tells,
As for the jets the actual shop manual states it should be 115 right and 125 left, and that is what I had before changing my exhaust, so with the new exhaust I went up to 117.5 right and 127.5 left. In past forum topics (did a search) this was not really clarified why this engine has this, so I'm wondering if I should have gone to 127.5 on each side, or 125 right and 127.5 left (since right now I have only a limited selection of jets to work with, 1-115, 2-117.5, 1-125, 2-127.5 wont have time to get anymore since I'm heading out on my trip in a couple of days.)
Thanks again everyone for your help (thanks John for the chart on plugs), going to get this right eventually.
Mark
i changed to same size for both carb's when i did my mod's "straght pipe's and podfilter's" after the change to a bigger jet size the side with the smaller jet's was way to lean. i then went to same size for both side's as i went up in size . i think the reason for the offset jet size was for emission's. ive got a bit of lag in the low rpm's cuz of the pipe's but it pull's up to 115 mph from 65mph fast
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does it just fall flat on it's face @ 6k and pick back up ? sputter and backfire ? any surging . have you cheaked the plug's for to lean or to rich?
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bump for input...
pull the carb's clean'm real good and go up 1 size on the jet's . reseal the intake manifold's to the head's to make shure you don't have any leak's there . re-install the carb's and sync them up and go from there ...
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was trying to avoid having to buy a new petcock as I have 2 spare stock ones. Was trying to avoid using multiple elbows as well but it sounds like the only option I have other then finding a really tiny fuel filter or one that has a built in L. Do the carbs suck the gas or is it all gravity fed. You can't have the line run lower then carbs then back up into them I presume?
Any place locally I can pick up a small L fuel filter.. not sure where to try.
try some local cycle supply shop's . that's where i found mine they had a big ol box of them @ the counter next to the big one's
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http://www.wemoto.com/bikes/Yamaha/XS_400_SE/80-82/
http://www.cmsnl.com/yamaha-xs400h-1981_model8825/partslist/
http://www.cmsnl.com/yamaha-xs400sh-1981_model8826/partslist/
http://www.bikerevival.co.uk/forks.html
http://www.babbittsonline.com/pages/parts/viewbybrand/default.aspx
i would go with the EBC rotor and pad's. i love mine
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There was no page linked... ???
I am planning on connecting the pods to the spliter thing that connects to the carbs.. and a 45mm filter will connect to that (i measured) im thinking i will have to take the carb apart to see what jets i need... well that is after i put the pods on and run into any leaning issues..
im pretty much all stock as well
those any good?
i'm runnig the uni filter's on mine . there well made and work fine . i tried the one's from mikesXS. the rubber was cheap. i'm willing to bet you will for shure have to re-jet
btw you can also get a prefilter sock for the uni's
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Hello, I have a 1980 Yamaha XS400 Special that I have owned since 1986...Lately, it has started this irractic idling and racing engine, I have narrowed it down to a vacuum leak from a shaft seal on the carburator...On each carb there is an E-clip, fibre washer and behind a small black seal which is old and dried out, the source of my vacuum leak..I went to our local Yamaha dealer to try to order replacement seals but was told that the there was no parts listing for that seal because it was a factory installed part and I would have to order an entire new carb to fix my problem...Does anyone have a more realistic solution to my vacuum leak? Is there an aftermarket seal available to fit my application? I realize I could use an O-ring in a pinch but I would rather find an actual double lipped seal that the factory used...Here is a picture link to the shaft where the leaking seal is located http://members.shaw.ca/mackeil/
Thank you,
Stacey
Vancouver Island, Canada
http://www.mikesxs.net/products-75.html#products
Part #48-5021
and Part #48-5022
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I just got a Yamaha XS400 and I need to find replacement air filters. If I get PODS will I have to rejet the carb? I was hoping to avoid rejetting. I have the air boxes, but the filter material is destroyed. I was thinking about just ordering the correct material and making my own air filters with an exacto knife a hot glue gun. Do you know what material I should order?
Thanks,
Adam
if you go with PODS you may have to rejet but it's not that big of a deal and you get to know more about your bike. i would go with the advise you got in your thread about it. try making some and see how you do . go down to the local cycle shop and see what they might have to use ?
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if that inlet valve was to some how work it self loose it could cause alot of trouble
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last time i took my bike out it started to run like crap halfway thru the day . yesterday i pull'd the carb's to give them another cleaning . when i pulled the top's off the diaphram's look what i found ! ive pulled this off many times to check for pinhole's and stuff but dam. look's like it was from when the carb's where made just some random bit left over from drilling hole's in the carb body . it made a nice hole in the rubber to. i fixed the hole with liquid electrical tape seem's to be working well the stuff i got is realy strong .
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so i was messing with installing some new Gran Tourisimo style grips i bought a while back from mikesxs.
I got the left/brake side grip off with a screwdriver going around the handlebar while putting a lil wd40/oil in with a straw.
the right side throttle tube i see isnt 'smooth', there are little 'ribs' in there and seems like i can't just put in a screwdriver it seems like the left side to get it off...
1. How can i take off the right-side/throttle grip?
Also when installing them, i don't want to use anything fancy/$$$ like grip glue...
I was gonna just heat up the left side for now in hot water and slide it on, but i heard peeps use
alcohol or hairspray or gasoline applied to it before sliding it on (not sure which one is best) so it doesnt slide around in the heat.
2. Which would you use?
3. Once someone answers question 1 (how to take throttle grip off), i then have a question how to get the new right side grip to stick on...
Would i even use hairspray on the throttle side grip? Seems like those ribs will hold the grip... maybe, i dunno.
Thanks for any advice!,
I'm pretty pumped doing small things on my bike during the riding season
just cut the old grip off with a razorblade or a sharp knife . hairspray work's good if it's real hard to get the new one on
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Mine is reving at 5,000 with the choke all the way in. It seems to go down when it feels like it...then it will idle too slowly and stall? So, it should be on the on or res position most of the time? Thanks
it should be in the on position all the time. it will let you know when you need the res
. the 1st thing i did when this happened to me i pull'd the carbs and the carb boot's . then i resealed the carb boot's to the head. cleaned the carb's put them back on and resync'd them and was good to go -
That's awesome! Now can you please help me with my charging problem? The bike has say for a few years now and had trouble starting. I replaced the battery and solonoid and it seemed to have worked for a few days. Yesterday I took out the bike, it stalled and when I tried to restart it there was no power whatsoever. With a charge it starts right up but if I dont keep the revs up as soon as I take off the charger it konks out and again its dead. Maybe regulator? stator? This is why today i took off the cover in the first place. Any suggestions?
maybe the ground wire? i found mine would not start some time's and there seem'd to be no power then i found the ground wire was rotted inside the wire jacket. after i replced it ive had no problem's .
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shame on whom ever did the to your carb's
i would check down in the hole's and make shure the "hole's" are ok . on some of the carb's the jet's come to a fine point and can snap down in there . my 82 has this type .not shure about your's may be different being older. i would pray there is not broken bit's of brass down in there -
i like the look of straight pipe's myself. i think it would fit well with your build . when i did mine i made custom baffle's that sliped in to the pipe's to hush them a bit . ive now removed them becuse i like the sound alot better with out them it's god awfuly loud tho
here's a old video after i made the pipe's the bike has gone thru alot of change's since then
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i can't wait to see some pic's of your progress on this bike . will you be doing most of the work yourself ? look's like your building more of a cruser/bobber/hardly davidson than a cafe style bike
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smallest filter on mikesxs was 54mm, the xs400 is 48mm i believe btw.
i have an 82 with bs34 carb's the 54mm fit perfect . i did switch to the uni filter's tho . the rubber on the mikesXS pod's riped the rubber was cheap . the uni fiter's are very nice . the rubber's stiff but plyable . they are a foam type filter with inner spring's you can also get a prefilter boot/sock for them .
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just get the pod's from mikesXS or get a set of uni filter's . i paid like 14 buck's each for the uni's at the local moto shop and they work gr8 . the k&n are a ripoff. just check the o.d on the carb's to see what size you need
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No, it is definitely gas and not oil. Looking at my factory book I can't identify what cap need to be pulled to be able to adjust the air/fuel mixture. What is the air/fuel adjuster called in the parts manual?
Thanks, Drewpy.
Phil
the manual call's it out as the pilot screw. i drilled a small hole in the cap then pry'd it out . i also got an air leak when i removed them and reinstalled them . so i got a new set with new o-ring's from http://www.mikesxs.net/products-37.html#products
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Alrighty i'll give that a try thanks. So would the exhaust i have work for the bigger jets, and k&N or prob not. If not what exhaust should i get?
and what size you recommend (exact size or how many sizes over should i go)
Thanks again
you realy need to check the carb's to find out "what" size is in there now . you never know until you remove the carb's and look . is it the stock jet's? did the other owner up the jet size when he put the holes in the muffler's ? when was the last time the bike had a valve adjustment or a carb sync ? in order to make the changes you want to do you need to check and adjust all of these thing's. i also would not expect much of a preformance gain by installing a k&n filter it the stock air box . if your bike has stock jet's i have heard that 1 size up from stock will help it run better . remember when messing with your carb's and making changes to the intake and exhuast . you have to tune 3 spot's on your carb's idle ,midrange, wide open throttle , pilot jet, needle jet,main jet . also the idle mix screw set on the top of the carb's i would replace the screw's,spring's ,washer's and the rubber o-ring's.
to make thing's easy just cut out the air box with a sawzall like i did
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XS650 carb and exhaust fit on the 400??
Yeah if i found bigger jets i was going to get a K&N or other high flow filter. and the person i bought it from had thrown a screw driver through the end on the exhaust (6 times on both sides to be exact) so would that be enough?
what number jet should i get?
that would be a no on the exhaust from the XS650 . but they do use the same BS34 carb set . you can also use the podfilter's they have @ mikesXS . you should 1st take off the carb's and see what jet's are in there now . if you have never removed them . i would also do a full carb cleaning and rebuild since you have to take them off anyway to change the jet's . here's a link i found here some time ago :
http://www.motorcyclecarbs.com/Motorcycle_Carburetor_Jetting__W7.cfm
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you can get bigger jet's here : http://www.mikesxs.net/products-38.html#products
but unless your goiing to change your intake and exhuast it wont change mutch . ive changed my intake and exhuast gone with bigger jet's did a valve adjust,carb sync , changed my plug wire's and plug's,new clutch , chain and alot of other stuff. it did make the bike a bit more peppy
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i would check down in the hole's and make shure the "hole's" are ok . on some of the carb's the jet's come to a fine point and can snap down in there 
XS400 Pods setups. seen any angled setups direct on carbs?
in Classics
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i had a hell of a time tuning after the pod set up ..but i also switched to straght pipes in the long run it was worth it love the way it look's and sounds
now