Quantcast
Jump to content

I guess I need to re-jet, but which way to go?


Recommended Posts

American Sportworks UTV, I swapped in a Predator 670 engine. I relocated the exhaust which was originally bolted to the side of the engine, to the rear of the buggy, via some flexible exhaust pipe. It runs like crap and I think maybe the reason is my exhaust is adding restriction. So I would need to put in smaller jets, right?

Also, the jets installed at the factory are two different sizes. The reason for that as I read somewhere, is that (with the muffler in the factory position) the exhaust gas path through the muffler is longer for one of the cylinders than for the other. I think my added section of pipe might negate that difference. So should both sides be jetted the same now?

Does anybody know where to get jets for this? 

20200627_171520.jpg

Screenshot_20200906-184656_Amazon Shopping.jpg

Screenshot_20200906-184744_Amazon Shopping.jpg

Link to comment
Share on other sites

On 9/7/2020 at 9:16 AM, Travis said:

Might try here, https://www.performance670.com

If not you ought to try and get in touch with the YouTuber RedBeardsGarage, Or, Cars and Camera's .They're  the brain to pick on all the predator engines.

I've seen those guys on YouTube but never occurred to me to ask them questions. They're obviously just regular dudes but for some reason, seeing them on YouTube, I think of them more as characters in a movie that you can't really talk to; a one-way presentation of entertainment and information. I'll give it a shot, thanks for the suggestion. 

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 Topics

    • By malenurse13
      We just bought a used 2017 American Landmaster TW450. No hour meter that I can find, so not sure exactly how much it has been used. 
      The first 2 days we had it, the starter was a little sketchy, but it started after 2-3 tries. Sometimes when turning the key, we would hear a loud metal "clink" sound. Like the starter made contact, but didn't have enough power to turn. 
      THIS MORNING... Turning the key, we hear a single click sound. That's it. Even with a new battery, the starter is still doing the same thing. Both batteries (old and new) were reading 12.8 volts on volt meter. So I'm wondering what else could be going on? Any ideas on what to look for would be greatly appreciated...
      Thank you!
    • By Hugh
      My 2018 Hisun sector crew engine cut off after about 15 minutes run. There is no indicator of what is wrong, no error code just die and won't restart until it cool down. I notice that the fan is not running but the temp indicator is on low temp, no overheat indicator. I checked the radiator fluid, it is cool to touch.
      Cooling fans are working, I can hear it running once awhile if I can get the engine warm up enough.  Thank you for all the help.
       
      Hugh
    • By Chucky 1
      I purchased a new 2023 Landmaster UTV L4 in October of 2023.  UTV didn't seem to have as much power of the demo L4 that I drove but figured once it broke in it would be better.  After about a week the unit started bogging down backfiring and stopping.  Gas fumes really bad, wait a few minutes and it would start up again.  Brought it back to the dealer and after keeping it for a few weeks said he couldn't find anything wrong with it.  Got it back home and it started acting up again, brought it back to dealer a week later and he said he found couple things that might cause it to do run bad and he was able to replicate the issue but didn't really know what was wrong.  Got it back home again after being at dealer for several weeks and the unit started running bad again right away.  Brought it back to dealer and he went back and forth with Kohler about possible fixes but just checked somethings and try to swap a few parts but still runs bad.  I called Landmaster HQ to speak with someone about a refund and was told that was handled at the dealer level.  Dealer called Landmaster and they told him they didn't do refunds or exchanges especially with units that had problems.  The dealer is now trying to get a new engine to but I have not heard anything as of yet.  I did file complaint with Better Business Bureau and they accepted my claim and reached out to Landmaster.  The National Service Manager called me and said the he had been contacted by the BBB about the complaint and he would look into it.  I told him that I would just like to have my down payment of $2,000.00 returned and never mind the over $1,000.00 I have paid in notes for a UTV that I cannot even ride on without hoping it gets me around the neighborhood.  I have found out that the 2024 Landmaster UTVs will have Vanguard engines due to issues with the Kohler engines.  Very disappointed in what is "Proudly Made in the USA" and the way Landmaster has treated this disabled veteran! 
    • By Richard shepard
      I have a 2021 colman 400utv engine will start and idle, as soon as you hit throttle to move engine dies and will only start when you throttle it, let off throttle it dies, I replaced the injector and plug still the same, anyone have any other ideas
    • By Robert B
      Going down a 20 deg hill engine is holding UTV back. Then something releases like going into Neutral and makes a loud clacking noise. Have to use brake to slow UTV down. Then once level it shifts back into gear. Have done shift extension does not pop out of gear.
×
×
  • Create New...