Yamaha big bear 400 wont idle Poor Medium and High Speed Performance. Share Yamaha ATV Forum ; Big Bear 400 idle screw won't move COMMUNITY SECTIONS. I am fairly mechanical, rebuilding an old Corvette right now, but have never messed around with bike carbs. the knob with my thumb, but there is some. However, if the battery is new or still in good shape and your Yamaha ATV still won’t go, it’s time to poke around other areas of your machine to find where the starting problem lies. R. It is an 02 big bear 400 2wd By turning this screw inward you are reducing the air flow, thus richening the idle mixture. Back in 2002 I bought a Mikuni Carb VM 34 from Jeff Kazimour at Carb Parts Warehouse (who closed his shop last year). Download Table of Contents Contents. Never adjust your Big Bear's idle without first warming the engine. It starts fine, but wont stay running. Content on grizzlyowners. Coming Soon. I removed and cleaned the entire carb out making sure all jet ports were cleaned and free from any I have a 1995 Big Bear 350 4x4. Posted August 26, 2019. When tested it out it ran fine but would idle up randomly here and there, I figured maybe a sticky throttle cable or the carb needed some tlc. It is an 02 big bear 400 2wd Yamaha Big Bear/Bruin/Wolverine ATV Discussion Kodiak Wont Run At Full Throttle. The most common Yamaha Big Bear 400 problems are frequent issues with the carburetor, difficulty in starting, 5 Common Yamaha Big Bear 400 I am new to the forums and in search of an answer. it runs geat when being used but at idle it is not a constant level idle. The symptoms are erratic idle (I had to idle it up so it will), and when throttled up it backfires and pops out the intake box and the exhaust with a little smoke that seems to be rich. I am not so sure it would operate a 400 and if it did it probably not have full performance. Yamaha Big Bear/Bruin/Wolverine ATV Discussion Big Bear will not run have a 2000 big bear 400, It has been sitting for a while due to my rear boot tearing and the bearings going out in the rear axel. It wont idle with the choke in the "off" position even with the engine fully warmed up. Dads400bigbear; Sep 28, 2024; 22 471 Sep 29, 2024. Yamaha 2005 Big Bear 400 4x4. 36,513 Satisfied Customers. So I did lower the idle and it often allows it to go into gear - but at the expense of being such a low idle its hard to keep have a 04 yamaha big bear 400. Even that's a job. 5 amsteel synthetic rope K+N, sigma racing jets. Same problem. 2006 400 4x4 M Warn 2500 pound winch Home made baskets 25' Kenda Bear Claws 880 HID Low Beams Only Front & Rear bumpers Moose manual lift snow plow, converted to work with winch. For a while I did not mind and used the pull start, now I want to get it fixed. Once under throttle, it runs great. Idle is better after warm up, but still wont stay running. This fact prompted Yamaha to produce its first camouflaged ATV in 2000 with the Buckmaster Edition Big Bear. If I hold the throttle open about 1/8-1/4 inch it runs great. Really loud and doesnt sound good and it wont go into gear. However, I've had great success with them in numerous applications. I pulled the seat off, and jumped the solenoid, and it cranks, but it wont start. IDLE MIXTURE SCREW: The idle mixture screw is the only externally adjustable carburetor jet available and controls up to 1/8 throttle only. I purchased the first one that came up as compatible and once it came in, I bolted it in and it fired right up with no noticeable issues. When it does get warm to hot it No codes. wont idle. com is an independent Yamaha enthusiast website owned and operated by VerticalScope Inc. Search Fixya. 2004 Big Bear 400 4x4. Add to my manuals. 12K posts 10M views Sometimes races, sometimes just cuts out. I have changed out starter relay,checked all fuses replaced starter switch,spark plug and cleaned all conecions on new battery as well as removing the starter and cleaning all grounds and positive conections. Yamaha Big bear 350, just rebuilt carb, only runs well when choke is on. It is slow to come down from high rpms and will "cough" back when the rpms do come down. Save Share Yamaha Big Bear/Bruin/Wolverine ATV Discussion 2001 kodiak 400 wont rev. About 3 weeks ago I was running my Kodiak just idle for about 5 min and it shut off and now cant get it to start back up just spits and pops through carb I have drained refilled fuel in case of water I have tore apart carb all clean no problems there tried 2 Not all Big bears are hard to shift it seems, Idle is low, tryed to lower it so it almost dies, same problem. I was riding it earlier and it was operating normally, then it suddenly cut out/stalled (no sputtering, just instantly died). it is located on the clutch lever it is the top wire that is closest to I recently acquired an 02 big bear 400 this past summer, carb on it was shot to sh** (pics attached) so my father recommended I just buy a new one off amazon. View and Download Yamaha BIG BEAR 400 owner's manual online. Joined Apr 16, 2014 Messages 225 Location Horseshoe In this video I bring you along as a look into a problem on my 2000 Yamaha Big Bear I just picked up off from Craigslist. Even if you have a new battery and your Yamaha ATV won't start, a simple test light and a digital voltage meter can help you identify the problem. Sign In Upload. Hi there, I recently picked up a 97 big bear to beat around in the bush. I've I recently aquired a Big Bear 350 2X4, that had been fooled with, mostly carb. 85242 Answers. After I got it, I pressure washed the fuel tank, replaced the fuel lines, added a fuel filter and rebuilt the carburetor. subforeman Discussion starter. The one for the Big Bear was $39 and the TRX $42. Faulty Gear Shifting. No signs of use, everything is clean. It wont turn over with the start button but you can jump across the relay to get it to turn over but dont In '02 Big Bear got part time 4x4. I think I will put the high performance carb back on it and adjust the needle to a richer position and see if this is the problem with it. hard to start wont stay running unless chock is on spits and sputters and ocacionaly - Yamaha 2003 XJR 400 R question. After riding for about an hour the other day, I took a water break and shut the machine off. This carb with a twist throttle made my ATV run like a spotted ape. It was my brother's. there is an air/fuel mix screw on the bottom of the carb and an idle screw that should be turned out 2 - 2 1/2 full turns on the side beside the pull choke Sounds like the gears grinding together. Then use either your idle fuel or air screw to obtain a stable idle. It would start but after it got hot, it'd only idle. It has sat in a storage unit since 2008. I check valve compressed air, and wires to punch through all the little holes that just won't blow out clean. Runs OK at idle but bogs down when I hit the throttle and won't reach higher RPM. One type is called a fuel screw because it regulates the flow of fuel into the idle circuit. When attempting to it will backfire, havent Yamaha Big Bear/Bruin/Wolverine ATV Discussion High Idle on Bruin 350 idle adjustment knobs or air/fuel mix screws are usually the last resort to fix a carb. The carbs are made in China. Even if you have to take it to a shop, it won’t be that bad and you should be back to a fine running quad in no time. Yamaha Big Bear 400 is running rich, 02 Big Bear 400- Hi-idle & backfires while running. Almost like I'm dragging the whole power train with the weight of the ATV. Next may be a clogged idle jet inside the carb. , 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada Hi, I am working on a friend's '01 Big Bear 400 4x4. Engine won’t start; Engine starts then stops; Popping and banging; Hanging idle; A lean running bike is common, and mechanics will usually identify the condition and make finer adjustments to the AFR at service 2003 yamaha big bear backfires and won't idle adjusted idel screw has new battery all the hoses are tight no water in gas any suggestion Posted by Anonymous on Oct 20, 2014. Yamaha Big Bear/Bruin/Wolverine ATV Discussion Big Bear 400 trouble. Does fine at idle and full throttle. you gotta make sure you cleaned it good and used twist ties through all the passages. New to the site and 4 wheelers in general. On 8/18/2019 at Yamaha Big Bear 400, Idle Great But Will Not Accelerate, Idle Fine Accelerate Only With Choke OnPlease like and subscribe to our channel Big bear 400 idle screw doesn't turn Big Bear 400 idle screw won't move. It only has 16 miles on it and looks like new. Amphibious ATV brands are special because they make the world’s most powerful and coolest ATV. carb adjustment screw location 400 yamaha big bear How do you adjust fuel air mixture on 400 big bear carb - K and N Yamaha Big Bear Yfm350fw Air question. My 91 Big bear will only idle on half choke. ATV Forum; ATV Picture Gallery; Downloads, Manuals, Guides; I have a 2003 Big Bear 400. It wont idle with the choke in So I have a 2002 Yamaha Big Bear 400. Have an 01 ultramatric. NICHE 348cc Engine Piston Cylinder Top End Kit for Yamaha Big Bear Moto-4 Raptor Warrior 350 1UY-11310-03 93450-19095-00 Mishon Big Bear won`t go in reverse My 1996 Yamaha Big Bear won`t go in reverse, any suggestions? - Yamaha 2005 Big Bear 400 4x4 question. i just got my warrior about 3 months ago and it was doing something similar it would idle good but then as soon as you gave it any gas it bogged down really bad and you could barely give it enough gas to get it into gear without stalling. I've gone through a comprehensive troubleshooting process, and I'm hoping the community might have some insights. Around this time the 400 lost low range. Just sounding like it/they were maybe spinning too fast to mesh well. K and N Yamaha Big Bear Yfm350fw Air Top K and N ATVs Experts Marvin . Whats the idle > tranny Big Bear won`t go in reverse My 1996 Yamaha Big Bear won`t go in reverse, any suggestions? - Yamaha 2005 Big Bear 400 4x4 question. Took it to local mechanic who couldn’t figure it out. Make sure you pull the 2016 / 01' Yamaha Big Bear 400 #5 . I have re-built the carb, replaced ignition coil, new plug, new plug cap, cleaned gas tank, fresh gas (obviously. The start cicuit wiring could also be damaged. com is not in any way affiliated with Yamaha Motor Company VerticalScope Inc. Really need help with an 02 Big Bear (won't start) Jump to Latest Alright, this is an 02 Big Bear 400 4x4. Faulty Drive Train. I'm working on a 400 big bear and I can't seem to get it to idle right. Search Fixya Browse Categories I got a 95 big bear and i got a problem with a rough idle and back fires. Can't get to WOT, won't make it past just off idle unless the choke is on. I'm working on a big bear 400. Jump-Out Gear. 2004 Yamaha YZ 250 F; Yamaha YZ 250 F Motorcycle I have a 2002 Yamaha 400 4x4 big bear ATV it has a bogging problem at 1/4 throttle it spits and sputters and pops but idles fine and high speed. Yamaha Big Bear 400 is running rich, it runs good at high speed but loads up at idle. there is an air/fuel mix screw on the bottom of the carb and an idle screw that should be turned out 2 - 2 1/2 full turns on the side beside the pull choke Poor Idle Speed Performance. I tore the whole carb down and it was all gunked up. I recently acquired an 02 big bear 400 this past summer, carb on it was shot to sh** (pics attached) so my father recommended I just buy a new one off amazon. 5 yr Admin changed the title to 2000 Yamaha 400 Big Bear, dies off idle; Admin. Any throttle input would immediately make it die. 2002 Big Bear 400 26" swamplites superwinch terra 2. I assume it's due Got the bike brand new in July of 2009. My grandfather passed away recently and has left me a 2000 yamaha big bear 400 4x4. Admin. I just bought the quad this weekend, the air screw was set 1/4 turn from closed. Tags big bear 400 help no start Hey, I have a 2002 Big bear 400, drove it for a short run and it wont start back up. Reset the idle speed screw as necessary after obtaining the correct idle mixture. However, it has been sitting for a long time now. The "mechanic" at the shop he took it to swapped the main and idle jets, I've never been into the carb you're talking about and they may not even screw into the same ports but on this AC they did and the dude swapped them. ADMIN Andrew. I went thru the whole carb twice, float and jet needle are right I'm sure it's not carb. Yamaha 2007 Big Bear 400 IRS 5-Speed 4X4 Exploring Edition; Open Questions: 0 answers. Not sure where the mixture screw is located on the carburetor? It's a Mikuni BSR33. I just got a BB 400, 2009, it only has 400 miles on it. Both suffered black plug. It has not run in at least 3 years. even Hey guys. grizzlyowners. View Thread Here! Save Share Reply Quote Like. In '07 the Big Bear got independant rear suspention and diff lock. The Kodiak became the Grizzly 450. Few days ago I purchased a 2005 Yamaha Kodiak 450. Level 3 Expert . If it's been sitting around for a while it could be the idle jet has a little craip in Big Bear won't start! HELP!!!!! Project Mini Crawler: 2001 Yamaha Kodiak 400 Full custom miniature rock crawler. Car Specialist. 1k 2 #16 Posted August 26, 2019. I have a 2006 big bear 400 that's driving me crazy. when i got home and garaged it for the evening i woke up to a hard start and rough idle. Whether your machine's "no start" problem is a fuse blowout or a starter gone bad, watch the video above or follow the steps below to learn how to check a Yamaha ATV for starting problems. This isn't something to do at home I have a 1995 Yamaha Big Bear 350 4x4. Electric seeder / salt spreader Rear Hooks for log chains Custom built railroad tie drag Home made fence stretching attachments-----To Do List Reverse Cam, Camber Mod you gotta make sure you cleaned it good and used twist ties through all the passages. The fix is usually pretty easy and relatively cheap. sounds like air hissing. Could it be the idle jet id clogged again some how? It pushes the carb out of the intake hose after it spits back 4 or 5 times. Guy I bought it from never rode it. by Yamaha Big Bear/Bruin/Wolverine ATV Discussion. 5 minutes later, got back on and tried to button start and the red oil light came on when i pushed the button and would not start. The choke isn't stuck, all passages have been thoroughly cleaned and 2000 Yamaha 400 Big Bear, dies off idle Facebook; Twitter; YouTube; How to Adjust Idle Yamaha Grizzly 350 400 450 ATVs. Runs OK at idle but bogs down when I hit the throttle and won't reach A sputtering ATV is annoying, but it isn’t the end of the world. MAIN JET Yamaha 2008 ATV Big Bear 250 won't idle - Yamaha 2004 YZ 250 F question. 25"x10"x12" Maxxis Bighorns / SS108's on all Corners Ricochet Skid Plates / Custom Floorboard Skid Plates Customer: I have a 2000 yamaha big bear 400 4x4 that wont start. Administrators; 2. In '05 it got independant rear suspention. 02 Big Bear 400- Hi-idle & backfires while running. S. The Yamaha Big Bear debuted in 1996 as a 400 cc utility-type all-terrain vehicle that quickly became popular among game hunters. Also for: Yfm40fbw, Yfm40fbx. . if you did, then disreguard above statement. Cleaned gas tank, replaced petcock, lines and carb. ran great, snorkeled it and tuned the snorkel so no mixture adjustment was necessary. Jump to Latest I just let it idle tell engine was warm and drained the oil and got that changed. I am fairly versed in air cooled engine, part of which included Yamaha Service back in the late 80s, After cleaning and fixing some common mistakes, float level, clean and soak carb, pressure test ndl & seat, fuel flow etc. The recoil starter fired it right off. I was given the bike after it was laid up for a year or more under a car port. 400 will sit and idle fine and come just off idle but will not rev up any higher have cleaned carb thinkin spark issues as it acts like a rev limiter and if u give it more throttle just starts to flood out. I noticed it did not shift like it yamaha big bear 400 atv starts & idles fine but wont rev, sounds like its hitting rev limiter - Motorcycles question. Shift Pedal Does Not Move. i have an 07 big bear 400 4x4 will 500miles on it, we recently got a snow storm and after plowing the driveway i went out to go play in it. I need to know what the factory base setting for the air screw is. The battery is completely shot and I was not able to pull start it. Greg League City, Texas The 17th model to be made available for commercial use, the Yamaha Big Bear 400, uses the same language as its predecessor from the 350-class of 1987. 2000 BIG BEAR 400 424 Disconnect Yamaha Durability tester. It would run for a while, with an erratic idle, then die with a pop. It runs fine at higher RPMs but when it is idling it cuts out and dies. Hey fellow ATV enthusiasts! I'm reaching out for some collective wisdom on a puzzling issue I'm facing with my 1999 Yamaha Big Bear 350 4x4. Replaced all o-rings and reassembled. pcheffernan; Jun 9, 2024; 9 Big bear 400 revs to the moon on start up. Background: My Big Bear was running fine not too long ago, but it unexpectedly cut out on me. Watch the video above or read on below to troubleshoot starting system problems with a Yamaha YFM700 Grizzly. Save Share Yamaha Big Bear/Bruin/Wolverine ATV Discussion 2003 yamaha kodiak 450 not revving up. The new carburetor is for a wolverine but it is also for a 250 - 400 cc so I think it comes adjusted for a 250. It 2005 yamaha big bear 400 problem? and the machine would start and idle but off idle it would caugh and die out. It still has decent power (80-90% maybe as it is now) I picked 97 Big Bear 350 wont crank. SOURCE: yamaha big bear 400 will Sounds like a problem with the starter, could be a starter fuse, relay or solenoid. I have an 01 big bear 400 4x4. Sometimes it will idle but most of the time it wont . I pulled the enrichener ("choke") Optional-and I won't do it unless some says it's almost impossible to start a cold engine without hand choking; Customer: 2006 Yamaha big bear 400 idles well, but won’t go above 1000 rpm unless choke set about 50%. I own a 2008 Big Bear 4x4- A year ago when I purchased the quad, it started fine, and then eventually the electric start stopped working. big time surging idle. I put it in neutral, green neutral light is lit, but it wont crank. In about '03 Kodiak was upgraded to a 450, and a degraded 400 stayed on as a budget modle. This video outlines factory procedures for adjusting idle speed on the following 2007 2008 2009 2010 2011 Hi I'm a new user in desperate need of help. Owner just rode it 2 times and sat in storage for 4 years. The bike hasn't been running to my knowledge for 4-5 months. Search Fixya Atv big bear 350 won't idle after cleaning. You want to start by testing the battery. But it's bad enough that when you try to ride, it just bogs and seems almost like it's going to die. is this about the same for a 2004 yamaha big bear 400? Read more Show less. If you can pull-start the motor, and it runs fine, you have pretty much eliminated any problems with the motor. @ Yamaha Big Bear/Bruin/Wolverine ATV Discussion Kodiak: Gear shifter grinding gears. you might want to try unplugging the parking brake sensor it helped me. Offroad Vehicle Yamaha BIG BEAR 400 Owner's Manual (174 pages) Offroad Vehicle Yamaha KODIAK 4X4 Ultramatic Owner's Manual (185 pages) Sometimes races, sometimes just cuts out. Delete from my It suddenly won't hold an idle at all and pops when I'm going downhill or at a slow speed. My buddy has a big bear 400 that is spitting back through the carb at idle and just above idle. Prior to my purchase the previous owner, a friend, said he cleaned the carbs. kwbretired Silver Member. Yamaha Big Bear/Bruin/Wolverine ATV Discussion Big Bear 350 cranks but doesn't start without some If it won't idle, check for leaks in the front of the carb at the boot and also at the cylinder. Thread starter pickupman6; Start date Jun 5, Starter Clutch+One Way Bearing+Gear Idler Kit For YAMAHA 1987-2014 Raptor Warrior Big Bear Moto 4 350 YFM350 1994-1998 Kodiak 400 moto1988ky. Read full answer. com is generated by its users. I rebuilt carb and cleaned countless times. Yamaha Big Bear/Bruin/Wolverine ATV Discussion 2001 kodiak 400 wont rev. Idle is fine. 2004 Yamaha Beartracker, new carb. We we cleaned the carb including the jets, adjusted the air screw from 2 and a half out to 3 turns out and nothing changed. after getting it warmed up and i went for a ride and it would only get 2001 yamaha big bear 400 idles poorly spits back through carb and exhaust pipe turns cherry red at head I have a 1997 Xlh1200 that won't start unless you use starter fluid. Today I purchased a 2005 Yamaha Kodiak 450. BIG BEAR 400 offroad vehicle pdf manual download. Want Yamaha big bear 400 wont idel and the red revers light blinks. it will not start now without hitting the gas. The 450 also got diff lock. But I was busy and didn't dig into it like I should have. When the motor is up to operating temperature, set your idle speed screw to a stable idle. big bear 400; By Leftysdad June 21, 2023 in Yamaha ATV Forum. Cleaned it in carb cleaner for days. 0 helpful. Fresh 91 octane fuel, brand new fuel lines and fuel filter, new air filter, new spark plug. Browse Categories Answer Questions . I cleaned the carburetor, changed spark plug, and reset the valves. it wasn't long before the bike was difficult to start. Yamaha 2004 Big Bear 400 4x4. 58 posts · Joined 2010 Add to quote Hey guys. Nov 03, 2015 • ATVs. **I got it to idle ok with no choke if I restrict the intake a bit, but throttling up sputters and backfires. Yamaha Big Bear/Bruin/Wolverine ATV 98 Kodiak 400 help wont start. I removed the fuel line from the carburetor and it was The Best Off-Road Riding Guide. Then it backfires/misses. Jump to took apart my carb before starting the machine this season as I always had to leave the choke on slightly to get it to idle correctly. Customer: i have a 2000 yamaha big bear 400. i just rebuilt the carb and it is still there. It runs great but the carb seems to be needed some kind of adjustment. But the ATVs shows some common troubles you should know about. I adjusted idle speed but it only revs up to higher rpms than what it shoud at idle. 2001 yamaha big bear 400 idles poorly spits back through carb and exhaust pipe turns cherry red at head I have a 1997 Xlh1200 that won't start unless you use starter fluid. I've cleaned the carb several times. When I first got it, the battery was dead so I was pull starting it. Hello all, I am new to this forum and joined in search of some answers. Well now she won't start, even if I open the throttle, SOURCE: yamaha big bear 400 will Sounds like a problem with the starter, could be a starter fuse, relay or solenoid. the idle on it seems to go up and down when idling. Hi, first time user here. Browse Categories 02 Big Bear 400- Hi-idle & backfires while. Hey guys I'm looking for some assistance here. A few months ago it started sputtering anywhere above about 1/4 throttle. Basically, she'll start up fine and idle around 1500-2000 rpm (full choke) but upon going to 1/2 choke or giving her any throttle, she dies. Clutch is adjusted, 2008 Yamaha Big Bear 400 I. The Big Bear 400 had a plugged primary jet and would not idle unless choke is on. So I did lower the idle and it often allows it to go into gear - but at the expense of being such a low idle its hard to keep running at idle. I just put a brand new battery in it and starter solenoid. There are two types of idle mixture screws. Yamaha Big Bear/Bruin/Wolverine ATV Discussion Big Bear 400 Starter I have a 2000 BB 400. It is cutting out when idling. Rather than rebuild carburetors, I got Caltric carburetors from Amazon. I need to know the year of my yamaha big bear 400 2wd the vin is 5y4ah08y51a011571. Not sure if this will help but I ran into the same problem on a guy's Arthritic Cat 500. 350matt. The problem is it is running so badly it won't stay running at an idle. dgrvjs cdyddno bjhwuq zgbhbr anycki duey lyopkl kxfjpz vsk fwyz