C/b oil capacity is around 75-100 ccs. There is another plug at the front of the engine that you can take off and see if any excess oil flows out. This was the original fill plug on the 350s,the 400 had the plastic fill plug/dip stick under the carb.Doesn't matter that much if it has a little too much oil as the c/b case has a vent tube that it can vent out. Look on the first page of comments about the leak down test I mentioned doing and the video.Plus here's another video on what's involved in this test to give you an idea. Soapy water while it's under pressure on gaskets, engines cases,etc can usually show any air leaks.

 

well that makes more sense to me....maybe ill give that a shot this week...im done for day...next thing id eyeball is a BFH and thats not good....THANKS again.

 

BWAHHHHHHHHHHHHH....now i done it...the new cdi came today and i slapped it on...now i have no spark...nada/zip/zero.. THIS just keeps getting better...what ya think??????????????


AND on an unrelated matter...my starter drive quit working... so i said HMMMMMM....ganked that all back apart there is a bushing in end of cover that the starter drive sets in...that cracked in 1/2 and bound on the drive...LIFE IS GOOD...now i need one of them...starter still works good though...tested that.

 

Well since you had spark before,now no spark with another cdi,I'd either place a stick of dynamite under it or retrace the wiring and especially the ground wire from the cdi that attaches to the coil mount, plus pull the black kill wire and see if you have spark.This cdi shows to be a replacement for part #3085087 which is what your model calls for,but is still Chinese like most of the after market modules. You take a chance on quality for price. About the only thing you haven't replaced is the stator,but still wondering if it's something other than an ignition related problem that's causing it to run just 15 seconds or so at a time even with the new piston,seals,etc.

 

ok...ill pull the black kill wire see what that does....i just looked up the bushing for the starter...i get the whole kit for 17 bucks to rebuild old starter...what the heck...ill do that...weird aint this? i did replace that brown wire...its new now...just cause it was scruffed up...but it wasnt broken or wires showing....ill get back to ya in a bit...could someone have installed a different stator that fits and another cdi and it would work??

 

With a used machine that may have changed hands several times no telling what the previous owner(s) may have done..

 

whelp...i pulled the black wire...nothing...i even ran a new ground again...right to the fuse box...and scotchlocked it...nada...tested it too...its a ground....what ya think? where do i go next???

 

About the only thing left I can think of is to hook up the old cdi that did have spark and if you've eliminated the carb,plus has good fuel flow from the tank,leak down test shows ok,then the only thing left you haven't replaced is the stator which may or may not help.. Wish I could see some pics on the wiring and stator and the wire the previous owner had spiced in..He had to have done it for some reason..

 

yeah he said it wouldnt run...took it to a place and they did it...ran for about a year...i just came from up street...im gonna take it to a shop...have it looked at...they said gotta be something simple...wiring probably...im gonna drop it off on monday on way to work....see what they find...thanks for all your help...they put a toggle switch on the brown wire that came from stator plate and then it went to cdi and a ground terminal in box...no clue why....ill get back with on what they find...if anything...thanks for all your help...it was sold CHEAP for a reason....next time i buy one it will be RUNNING and all set to go...but im a mechanic and CHEAP my fault...my luck it has a hair line crack in block or something stupid....i didnt do the leak down test...i just put the seals in...and the one was bad behind the clutch...so i figured good to go....will see what they say...i also used to work for the gubberment long ago...we had a flow bench for carbs...told ya right off it it was working or not....all i did was ck the kit already installed...dont mean the carb is any good...

 

they say this one fits my atv for 59 bucks...

http://www.ebay.com/itm/Stator-Polaris-400-L-Sport-400-1994-1995-Big-Boss-1995-1996-1997-/331319199453?pt=Motors_ATV_Parts_Accessories&hash=item4d2429c6dd&vxp=mtr
i can take some pics if you want with my phone of the wiring....just to show ya if ya want.....let me know.