Quantcast
Jump to content


1990 YFM350 VIN JY43HPW05L00xxxxx


Go to solution Solved by ranchhelper,

Recommended Posts

From what you describe it sounds like someone screwed in in too tight and stripped the last thread and if you pull up on it while turning it will grab the lower threads and screw out, just a thought, it could be that the threads have disintegrated from sitting in the weather for many years and may just pull out if thats the case you can repair the carb with a heliocoil or better option get another one, is this an OEM carb or aftermarket any markings on it. 

Link to comment
Share on other sites

It's right dickered. 

Yeah like I've been saying it's MIKUNI so it's clearly OEM.

Ordered a new one (aftermarket).

Can't get that jet out. It will rotate but not come out. 100% it was originally cause by that corn gas garbage produced by the midwest/western corporate farms. That land needs to make food, instead of pandering to artificial subsidies and contributing to fuel contamination. It's destroying health (corn oil) and destroying our carbs.

Link to comment
Share on other sites

Sorry about the slow reply. Been away on a family emergency.

In that PDF service manual you posted the relays are numbered in the wiring diagram. That's where I get the numbers, but the index says what their role is.

Check the idle mixture screw turns before you go to far on that carb. In my opinion a seized idle screw is a more difficult problem to cure.. The rest will probably be fairly easy to clean up. Not sure about that main jet removal. Is that a plastic housing the main is mounted in ? Never seen that before, perhaps the whole plastic tube slides out then there's a flat to hold the brass or something.. I'm short of time but I'll check the manual if I get a chance.

Link to comment
Share on other sites

So what are we up to on the wiring, cut out relay neutral relay and reverse relay, is the  new soloenoid working good.

 

I have looked high and low for a free manual for that bike seems to be non existant, the one Mech found seems to be the best. 

  • Thanks 1
Link to comment
Share on other sites

On 6/8/2024 at 7:39 PM, Gwbarm said:

So what are we up to on the wiring?

The dash lights and relays work as they should. I am thankful that the PO didn't actually mess with the original wiring harness as suspected. The neutral relay, the START button, and the starter solenoid was bad. 2 new relays with the same SPST NO nature as the neutral and stop switch/engine cut relays came in, and I have swapped-in a replacement.

I may have restated the above in an earlier post, but that is a re-cap. Everything including pressing START when the ATV is correctly in NEUTRAL works as it should. Only the relay is not hooked-up to the starter, and I won't do that until I've put new oil and filter in it.

I am waiting for the KN142 cartridge-type oil filter to come in, ordered over a week ago with the other parts. Apparently it was not Bezos 'Prime', and I missed that. I could not find the equivalent in stock at Walmart, because I have the fluids and would have bought one of them, there-and-then. Maybe someone knows of a compatible filter, because they do have a dozen filter cartridges. 

It looks like the procedure is to remove the screw holding the cooling lines to the frame, the shift lever, then to remove the 3 socket-head cap bolts keeping the N12345 cover on, and the filter should slide out.

The airbox and hoses are ordered. They are close in year make and model, and I will not be 100% sure that they will fit until they arrive.

Edited by ranchhelper
correction/addition
Link to comment
Share on other sites

You have been busy, sounds like its coming together nicely. Good choice deciding not to rip out the existing harness its usually easier to repair the existing one. Sometimes i can find Wix oil filters ot Oreilys but not all the time, so you did good to order it. The last time i just ordered the Yamaha one from Amazon, it came in a 2 pack.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Forum Topics

    • By exalrod
      Hello All !
      I am looking for a service manual and wiring diagram for a 2005 50cc Polaris Predator 4 wheeler.
      Could anyone help with this?
    • By Need-help-with-quads
      So I have an 89 Yamaha moto 4 250cc and when I ride it, itll get hot after like 10-15 mins and then will just die and turn off.
      It's has new carb rebuild, new air filter, new battery, new spark plug so I don't think it's a crack in the spark plug
      Can anyone help me?
    • By lester
      I picked up a 2000 Big Bear 400 4X4 that was sitting around that I know nothing about. It will not start. I do have a red light when in reverse. When I take it out of reverse, I do not get a green neutral light, and when I push the start button the red oil light comes on but there are no noises, nothing else happens. How do I test the neutral switch and/or bypass it to see if I can get it to at least crank? And does anyone have other suggestions for me to try?
    • By Brantley11
      Hey everybody,
       
      My proficiency is with Hondas and Yamahas make me see RED!
       
      This bike is my brother in law's, it has 1199 miles on it and went from running great to dead with no start. Every once and a while it will start and sputter for 2 seconds. It is extremely sporadic when it fires but never runs for longer than 3 seconds. 
       
      Here is where we sit:
      Brand New Fully Charged battery
      Carb was cleaned with air hose and carb cleaner then into the ultrasonic cleaner with Aircraft aluminum cleaner
      New Shindy Carb kit (made in Japan version)
      Cleaned out petcock and gas tank
      New 93 Non Ethanol Gas
      New Spark Plug
       
      It gets a spark through the spark test light every time
      Bluish white spark
      When holding the spark plug 1/4" - 3/8" away from head it will jump and spark to the head
      Good Compression
       
      Here are the readings:
       
      Pickup Coil 519 Ohms (range 459-561)
      Charging Coil 266 Ohms (range 270-330)
      Lighting Coil 0.700 (range 0.702-0.858)
      Spark plug Cap 10.58 Ohms (10kohms
      Ignition Coil Primary Coil 0.5 ohms (range 0.18-0.28 ohms)
      Ignition Coil Secondary Coil 8.20 kOhms (range 6.32-9.48 kOhms)
       
      Would y'all think stator and pick up coil, rectifier or CDI are the culprit?
       
    • By oxidized_black
      Yamaha ATV manuals are located in the downloads section here at QUADCRAZY.
      Please visit the downloads section at https://www.quadcrazy.com/files/
      Get 15% at emanualsonline.com with coupon code EMOAFF
      Get 20% at emanualsonline.com with coupon code BLAZE and $50 purchase
      Clymer ATV Manual - Yamaha Raptor 700R
       
×
×
  • Create New...