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xplorer 400 new engine, trouble with mounts

529 Views 20 Replies 4 Participants Last post by  xplorer400polaris
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hey everybody! ive searched and youtubed, trying to figure out why im having engine mount issues, long story short i built a 400 engine from two. the crank case from a chain drive style xplorer older than 99 (Had no idea), new clynder bore (shaft front drive Style 99) new bearings seals. new water pump parts. this is a 1999 frame green with the anivsersery badge
trying to mount the carb the slide cover is so tight into the crossmember, i see videos with a inch to spare to remove the slide a needle.looking at all my mounts they are 3 bolt and i cant think i have them backwards but maby you guys can spot somthing??? the carb is way to close to the cross member not really into the intake boot yet but somthings not right. the carb will be at a steep angle. been trying to get it right for hours now trying to look at pictures and diagrams, building this from a milk crate thank you

the crankcase is from a older unit older than 1999 i think, the cylinder is from a 1999 the frame is a 1999, its like the engine has to come back or sit a little lower to clear the carburator slide removal.

now i find out on the internet the eary years had a chain drive front diff, probly a different transmission, differnt engine mounts. Now im worried i built a older crankcase to a newer model transmission, mine is shaft drive, darn


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this is a another pic of a shaft style model, Clutch side of crankcase looks same as mine



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Polaris changed the cylinder and the carb holder on later model engines - to mate the two you need a custom carb holder made from aluminum with a spigot to connect the carb to the holder with a piece of radiator hose clamped on each end.
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What you have is a 94-95 cylinder with the reed valve mount cut on the same plane as the engine mount
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What you need is a 96-2000 cylinder with the reed valve mount cut parallel to the bore of the cylinder
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The carb holders are different too
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ah drats!!!! so i found the early model carb holder in another box buried. the angle IS DIFFERNT btween the 2 and it worked!!! theres some room, seems ok. Is there any issue with running this older cylinder/crankcase combimination? thank you all i really really appreciate the info i will never EVER accept another job where i have to build one quad out of two and in boxes... what a nighmare.....today im trying to find the order/qty of washers parts behind the drive and driven clutch
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Driven side theres a foam seal thing that sits in the inner clutch cover then two washers/shims.. some say 3 should be there, diagrams say 1.. is this for alingment? with a straight edge when the clutches are installed??

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part number 1/2 is the question here



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those shims are for the clutch float adjustment , it would need to be checked with a tool , providing the the new motor has same crank center line it might be ok ,
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Now that you have the cab installed without hitting the frame the only issue will be connecting the air box to the carb - the connecting tube may be too short.
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yea working my troubles from the inside out... airbox is next...clutches now aswell pics coming soon.... trying to find a service manual metric and SAE fasterners all mixed up...
another tool! not a straight edge hey? omg what have i done.. things i never took into account

why i decided to use a cylinder from a older style vs the newer one becase it was bored 2 times.. i chose to use a cyl with one bore vs bore a 3rd time
newer crankcase had aftermarket crank that had a little blue spot on the rod, and the impeller was missed and the stator behind the flywheel screws came loose and buggered the flywheel/charging system housing, so i used the older crankcase (stock crank rod vs iffy newer messed up one) did water pump, crank seal, used the sound flywheel housing,
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You mean one of these?
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exactly a clutch alightment tool
Which one do you need?
driven and drive clutches are 1999 version, im not to sure exactly, i do have the older version clutches. trying to find the torque spec for the bolts..
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Clutch alignment tool
2870654 clutch offset alignment tool 74.00 74.00
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ok ill seek one because i dont have one, cant borrow one, no idea if my clutches are in line
154$ from motion pro its a week away
i searched for a manual on this forum but all old posts with no results lost content, is there no downloadable servicer manual around?
ok i got it started and running, few things....
started right up!! very smoky from maby to much assebly oil, didnt have to nurse the throttle to idle. its extremly rich boggy throttle. very low idle almost knocking its so slow,tried all the way in and out on the idle screw no change really thats somthing(carb slide not bottoming? it sounds like it bottoms out. air screw no real change all the way in or out. i should check the clip position feels like way to much fuel maby lean a notch,see how the idle and throttle reacts, take it for a short shakedown run . its a brand new chinese carb from the owner, the stock makuni has a stripped throttle cable thread im waiting for a tap. id rather use a makuni
i havent been in the carb, maby its still clearing up.
some bubbles coming out at the reed flange i did put a new gasket on engine side, needs a tweak should have run lean if it was sucking air.

Top water line off the head is cold when the engine is hot to touch normal? maby 10 mins on it idleing tweaking the screws. i burped the air out of the head bleed screw a few times.
the cold side of the water line has a inline electric water pump a Faucet Posi- Flo brand mounted just behind the rad its warm ive never even seen this part ever in the cooling systems diagrams weird. is this electric water pump wired to the rad temp sensor? fan? i NEED A DIAGRAM like every other xplorer i read about the wires are hacked.im a little concerned the mechanical water pump isnt working. i would really like to know how fast i should feel hot side on the head warming up before i assume somthing in the pump isnt sealing or flowing.. i had the electric water pump wired in runnning to run during a heat cycle..
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apoligies for the spelling and grammer.
ive determined the electric inline water pump pulls water (uphill)from the mechanical pump to the top of the rad by plugging it in and watching flow through the rad cap, that must mean colder water enters at the top of the head also from a port at the top of the rad(this is odd to me shouldnt cold water be drawn from the bottom of the rad, no lower ports on rad), Im not sure if this elec pump runs constant or if its tied into the fan switch and fan to act as one when the fan switch comes on or constant? would it block flow to the rad at rest? thinking tie the fan switch,fan and electric pump together. in parallel with a toggle to override (turn fan and pump on)
ok ill seek one because i dont have one, cant borrow one, no idea if my clutches are in line
154$ from motion pro its a week away
i searched for a manual on this forum but all old posts with no results lost content, is there no downloadable servicer manual around?
I sent you a couple of manuals that will cover the vehicle you are working on - sean tosdw _ _ @h _ _ _ _ _
wow wow those manuals are very good they help alot as im going through them making sense of them performing tests and making things better! thank you latebird!!

I deleted the electric water pump. 1 it does not belong there(previous owner had no impeller and put a inline pump in to circulate) i rebuilt the water pump in the engine. 2 the pump was in backwards idiots... now i come to find out the rad is full of sludge, no my countershaft oil never leaked out i checked. the oil in the rad was from previous neglect. gotta remove the rad and clean
going to see what this brand new carb chinese needle clip position as its sounds dog rich (takes a while to come up to mid-high rpm blips and very low idle no change on idle or air screw what so ever, still waiting for tap for makuni throttle cable threads buggered.

changing those indicator bulbs with the thin wire to the brass tabs in the plastic housing are THE DUMBEST thing ever lol with the manual i got all the lights working excpt 1 bulb burned. i carefully got the three brass contacts out, tried to un pinch where the wires are, thread in the wires punch it, push it into the housing, found my glue gun tried to dab and snapped a wire off omg lolololol
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