Quantcast
Jump to content

  • Do you own an ATV? Join our Forum!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

Ajmboy

2004 Yamaha Grizzly HMF Swamp Series Exhaust

Recommended Posts

Starting a new thread on this topic. Installing an HMF Swamp series slip on. Needs to be jetted, so I took the bowl off and..stripped out the carb bowl screws, they're so damn soft. Had to leave it alone and order some screws, bowl gasket, and new air filter. Just waiting for the parts to come in.

Edited by Ajmboy

Share this post


Link to post
Share on other sites


May I suggest some socket cap allen head screws from your local hardware store? The first thing I do to any of my carbs is replace the float bowl screws. The allen head screws don't strip. BTW, that Grizz looks like it is in good shape, nice score.

Share this post


Link to post
Share on other sites
May I suggest some socket cap allen head screws from your local hardware store? The first thing I do to any of my carbs is replace the float bowl screws. The allen head screws don't strip. BTW, that Grizz looks like it is in good shape, nice score.

Thanks, that's a good idea. I ordered extra screws from some Yamaha parts site, just waiting for them to come in. I don't even know if I have a local hardware store except for a Home Depot.....

Share this post


Link to post
Share on other sites
Thanks, that's a good idea. I ordered extra screws from some Yamaha parts site, just waiting for them to come in. I don't even know if I have a local hardware store except for a Home Depot.....

Home Depot is where I got the screws for my carbs. They don't have a huge selection of metric stuff, but they did have Allen head socket cap screws that match the threads on my float bowl screws. The heads are kind of small, so it is best to use washers with them. I think they are 4mm screws with a .7 thread pitch, basically a common 4mm machine screw. If you have problems again with the new phillips screws you have coming, or you just want to upgrade anyway, I would recommend this to anyone who has to do frequent jetting changes. The allen head screws are so much easier to deal with than the phillips. I think that the persons who invented phillips and flat-head screws should be exiled to a poor war torn counrty for all the frustration they have caused me. This Allen fellow who so kindly gave us the allen head screw should have a statue built in his image.

Share this post


Link to post
Share on other sites
Home Depot is where I got the screws for my carbs. They don't have a huge selection of metric stuff, but they did have Allen head socket cap screws that match the threads on my float bowl screws. The heads are kind of small, so it is best to use washers with them. I think they are 4mm screws with a .7 thread pitch, basically a common 4mm machine screw. If you have problems again with the new phillips screws you have coming, or you just want to upgrade anyway, I would recommend this to anyone who has to do frequent jetting changes. The allen head screws are so much easier to deal with than the phillips. I think that the persons who invented phillips and flat-head screws should be exiled to a poor war torn counrty for all the frustration they have caused me. This Allen fellow who so kindly gave us the allen head screw should have a statue built in his image.

Nice, thanks for the info! :yes:

Share this post


Link to post
Share on other sites


I took your advice DD, I bought those allen head screws. I still have not got the parts by mail...

Yesterday I wrapped up the exhaust, installed a HMF Swamp series slip on. I installed a 175 main jet per recommendations from HMF. Starts right up, but I noticed some smoking going on. I changed the oil, because it was due and black. Seemed to get a little better. I'm wondering if I should go down to a 165 or 175 main jet. I also am waiting on a new air filter, stock replacement. The exhaust sounds nice....:yes: Just a little bit of a rough idle and slight smoking. No smoking with the stock exhaust. I've never gone aftermarket exhaust, so this is new to me.

Share this post


Link to post
Share on other sites

I've installed a HMF Swamp Series slip on exhaust on my Grizzly. I noticed a bit of smoking coming from the exhaust. Jetted it to HMF suggested 175 main jet. Seems to run pretty smooth. Definately feel more power. attached some pictures. I'm going to write up a full review for QUADCRAZY.

P1010198.jpg

P1010250.jpg

P1010198.jpg.e88a234978338798082613fffcb3c673.jpg

P1010250.jpg.3e03cd31b4fa1ef186caab6bc1e02bd9.jpg

Edited by Ajmboy

Share this post


Link to post
Share on other sites

i have a buddy that has a brute force and he put on the same exhaust and his quad smoked a little at first,so i believe this is common with a new exhaust,and he loves the swamp series exhaust,he noticed a power difference and more mid and low end power,i think u will prolly like it,but he thinks he may have lost a little power on the top end,but then again that it where you use the most of your power.

Share this post


Link to post
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 Topics

    • By Buell
      Hey guys, figure you guys would have some helpful direction or answers.
      So, 05 Sportsman 700 carb, new carb, fuel pump, new plugs, new air filter, new everything I can think of that is usually the running issues. Starts up fine, seems to run fine, but if under load, two people, or even one person, up a hill, or pulling a drag chain for the driveway, it starts to cut out and sputters and loses all power, until I back off on the throttle and just barely try to let itself catch itself and then I can take off again.
      I am going crazy trying to figure this thing out. Other than that, the quad runs great. Parents bought bran new, just used around the property, 5000 miles on it. Any ideas???
    • By Ellery Zandt
      Does anyone have a redcat 250 or falcon 250cc that they can share where the two vacuum lines on the carburetor that you run antifreeze through I honestly have no idea where the lines are suppose to go to circulate the antifreeze. 
       
      Any help is greatly appreciated. 
       
    • By Dra O
      posted a while back - it was running at one point - I have all the plastic shroud off - it's down to frame and engine now
      -fuel pump: when line from petcock is attached, no fuel comes out other side to carb; the line to the carb is open (can blow through it); I thought when I cranked engine that the pump would spit out fuel on other side but it does not; I removed fuel pump and opened it up - diaphragm looks good - but internal areas had lotsa calcification build up - I cleaned this out and dried it good - the clear plastic pieces (?diaphragms) aren't broken - the spring w/ steel ball on end moves freely; am putting it back on tomorrow; but can anyone answer about the pump? isn't it supposed to pump fuel through it... to other side... to carb? puzzling
      -along with fuel pump: I replaced petcock 3 weeks ago (gas tank had rusty fuel in bottom - cleaned it out prior to new petcock); when I turn petcock arrow NOT to on or reserve, fuel comes out of line; when I turn it to on or reserve, fuel doesn't come out; puzzling
      -I don't know what's on back of fuel pump - it's a valve that has a hose coming out of it - looks like it goes to engine/carb - I haven't traced this out yet - what is it?
      -can squirt gas on air filter and engine will run for 2-3 seconds then stop - fuel in top of carb (under diaphragm) does same
      -it likely needs carb rebuild - will get to this - but something isn't allowing fuel to get from fuel pump to carb
      -I THINK it has a mikuni model x carb - diaphragm is ID 26mm  OD 68mm - hard to find inexpensive diaphragm, I guess because it's a model x
      -last thing - I replaced solenoid due to old one clicking; I HAVE to be charging the battery or it won't start/turn over - battery just goes dead; but if charging, it'll turn over nicely; i'm guessing it's a bad battery
      -any help appreciated - I've never owned an ATV before - inherited this beast from grandparent in-law
    • By PKR
      I rebuilt the carb on a 1989 350 Big Bear. This is a Gen 1 carb ( 2 cables running to throttle).
      Quad starts and runs but I have fuel leaking from the air intake.
      Is the float set to high / low?
      Does the needle for the main jet need adjusting? I have it on the center groove ( 2 groves above and 2 groves below).
      All jets are new, float and needle and seat are new.
       
      Thanks for your help
      PKR
  • Similar Tagged Content

    • By Trenton
      Hello. I am a new member as of today. I had a quick question to ask. I recently was driving mt HONDA RANCHER 2004 GPSscape 400 and my display stopped working. I was driving the atv and all of a sudden the speedometer and the service lights went out. Also the lights stopped working. I am still able to shift gears, change from 2wd to 4wd, and can still select if I want EPS or Auto. I have checked my fuse box and have changed a few of them around. It did not change anything. I was wondering if anyone had any idea of what had happend. Thank you for your time- Trenton 
    • By LTZ-Zach
      So i was riding the other day and my quad randomly shut off. It started back up and ran completely fine for a little while and then it started idling terribly.
      I cleaned the carb and changed all the jets and everything except the float due to the rebuild kit not coming with one and it actually runs worse then it did before.
      It will run and idle decent now but when I give it gas it dies.
      Does anybody know what could be wrong?
      I also changed the spark plug and air filter along with the oil and oil filter.
       
    • Guest Fox300exchic
      By Guest Fox300exchic
      The Hop-Up: You may be saying to yourself, “that’s a chick bike,” and you’re right. But honestly, it’s so much more than that. It’s one badass bike. http://www.quadmagazine.com/quad/features/article/0,24942,1587044,00.html
    • By dyyjrr9
      I just got a 1991 Yamaha Moto 4 for my son and I am looking for a service repair manual. I know that the timing chain needs replaced.
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...