Quantcast
Jump to content

2000 Yamaha Big Bear 400 4x4 shifting question


mga

Recommended Posts

Finally got it together and running, but shifting seems a bit hard, especially if you have sneaks on. Are they normally that hard to shift?

Also, when i releaase the throttle to shift into another gear, it doesn't seem to lose RPM's fast....it seems to take it's time. I put a new throttle spring in about a week ago and the lever does back off, it's just doesn't seem to die down as fast as it should. I've got the idle down as low as i could get it before it would quit. Other than that it runs good.

There's an aftermarket carb on it, so maybe the issue lies there?

Link to comment
Share on other sites

9 hours ago, Jim Denton said:

It's a cv type carb maybe check if the slide and its bore are smooth? Being vacuum operated it might be hanging up on the way back down. If the shifter uses a cable try and lube it?

i had to add a new "choke" cable, maybe i need to adjust it better.  i'll try that today.

  • Like 1
Link to comment
Share on other sites

22 hours ago, Jim Denton said:

Seems to me that if that plunger is sticking it'd be running rich.

checked that out, seems to be sliding nice, but i found the throttle cable was hooked to the side frame, making an small bend shape to it. I removed it and kept it straight and it seems to be great now. It's those little unseen things that can give you a pain.

Thanks for helping!!

  • Like 1
Link to comment
Share on other sites

Yours was an easy fix, I had a yamaha doing that once and I had to take the slide out and polish it smooth to get it to slide easier still wasn't perfect I came to the conclusion that the spring wasn't strong enough for it to return, causing the idle to stay high after releasing the throttle.

Link to comment
Share on other sites

Glad you found it. Since you know your way around check out the Sigma Six kit. I did a similar kit to a Mikuni on a Evo I had. Woke it right up. I also had stright shots on it so it breathed well. And an Andrew's EV-27 cam. This kit  will be going on the one I'm building now, along with a 250S cam thanks to a trade with one of our cadre.  Both cams are the same as to almost doubling the duration but same lift. I wantnto see it running first as is.

 

https://www.6sigmajetkit.com/suzuki-lt-f-300-king-quad-jet-kit.html

Link to comment
Share on other sites

3 hours ago, Jim Denton said:

Glad you found it. Since you know your way around check out the Sigma Six kit. I did a similar kit to a Mikuni on a Evo I had. Woke it right up. I also had stright shots on it so it breathed well. And an Andrew's EV-27 cam. This kit  will be going on the one I'm building now, along with a 250S cam thanks to a trade with one of our cadre.  Both cams are the same as to almost doubling the duration but same lift. I wantnto see it running first as is.

 

https://www.6sigmajetkit.com/suzuki-lt-f-300-king-quad-jet-kit.html

trying to tempt me??

i bookmarked that link for future refernce.  thanks!

(don't tell my old lady)

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 Gwbarm
      I finally got around to working on the TRX, this has been an ongoing problem with this machine. This is a machine that we keep on my Fathers property, i dont see it that often, my brother haad it professionally repaired last year and year before same problem, the new starter gears and bypass gears last about a year and the machine is not used that often, he said he was done with it , so i thought i should go take a look. Sure enough the gears were all malled again. 
       

       

      IMG_4910.mov   There is some slack in there but most is taken up by the gear cover,if anyone with history with these machines has had the same problem, let me know your findings. Where i am now im looking for finding replacement honda gears on Ebay and try those. I suspect the original was replaced with aftermarket gears years ago and they just worse quality as the years go by. 
    • By Mikey69
      Heres my story. Kinda long. I guess I was a late bloomer when it comes to quads. I had never ridden a quad in my life. Rode Dirt Bikes as a kid growing up. Back in Oct of '06 I found a Mustang on craigslist. Took it for a test drive one morning before work. Fast car. 351 Cleveland. I had planned on meeting the guy again after work. For some strange reason thats still to this day beyond me, I stopped in Hillsboro MotoSports on the way home from work. I had 6 Grand on me. There was a left over '05 sitting by the front door. It was on sale for $4999. It was $5499 OTD. I didnt even look at anything else. I knew nothing about quads accept I thought it really looked coool and I had the money in my pocket to buy it. I was sitting on it when the salesman walked up and asked... "Can I help you?" Without hestitation I pulled 60 Ben Franklins outta my front pocket and said "I want this Quad. Load it up in my truck." It was just about dark by the time I drove away from the shop. BTW, I didnt bother to ask my ol lady if I could buy it. LOL. Anyway, I took it by the house and showed her. She was kinda stunned but not mad. We drove over to a friend of mines house and unloaded it. I took it to the field across the street from his house. HOLY CHIT!!!!! I was surprised by the power. I had it for about 2 weeks and took it to Sand Lake. I was there a few hours and rolled it on a banked turn at the top of the bowl right before you get to the one-ways. When it rolled, I flew off and landed on my belly. The quad came bouncing and landed on my back. For a month I couldnt even walk. I was scared of it. I considered trading it for a 250EX. Went back to the shop. The salesman said..."Dude!!! You dont want a 250EX!!! Trust me. Just get used to it" I still wasnt convinced. I put it on craigslist for $4000. Calls were coming in. I had a guy that wanted to come look at it that evening. I decided to take it for one last ride at Browns Camp before I sold it. I was still afraid of it. After about 5 minutes I started feeling comfortable on it again. I decided right then, I loved my Honda 450 and would learn how to ride it instead of selling it. That was late Nov of '06. Work was slow for a Painter in Oregon. My new job everyday? Going to Browns Camp and ridding my Quad. I bought my Girl Friend an '02 Blaster. I rode my 450 for 4-6 hours almost every single day for 3 months. And yes, I know my way around Browns Camp pretty well. LOL. In March I bought her an '06 TRX250EX (Thank God I didnt trade my 450 for one of those) LOL Since then, I have become totally addicted to quads. I love them. Couldnt imagine not owning at least one quad. Luckily I have two. My "07 was $6500 OTD in July of '07. Bought it for my Girlfriend. Traded in her 250 EX. A month later we broke up. So, I wound up with two Honda 450's.
       
    • By HSTAR
      Hey I have a 1997 big bear 350 4x4
      I replaced the shifter shaft and the shift arm linkage and the rod when I installed them all I was unaware that you had to line the dot on the shifter shaft with the gap on the linkage arm gap put it all back  together and rode it I can't get it to shift in the right gears  I can move the shift cam by hand and goes in different gears but with the shifter shaft in it riding I can't put it in R or N 
      Anyone know how to line up the shifter shaft and the shift cam s
       
    • By BruceG
      Hi guys. I have a problem where the quad will start and run well for about 5 minutes and then it dies. On inspection the airbox has oil in it (quite a lot). The oil is pumping through the cylinder head breather hose. This problem first happened suddenly. I have since done the top end including, piston, gaskets, rings and valves. I have also done the carb (not that I thought that this was the problem). The compression seems normal. The only thing that I can think of, is that I did not grind the valves well enough. Anyone experienced this? If so, how did you fix it? Any other thoughts?
    • By DarkRider
      This is something I'm extremely curious about. Has anyone ever attempted to buy a quad (or any other vehicle) from an impound lot? I've always wondered if this could be a bargain, or a waste of time. Google searches do turn up some helpful results. Looks like the state of NJ holds auctions online which I'd be a bit hesitant about.
       
      My online searches haven't really turned up any results of anyone buying an ATV this way. I'd be really curious if anyone tried this, or knows someone who has. I've actually found a couple pages with online auctions for my state, but none had ATVs.
×
×
  • Create New...