Quantcast
Jump to content

  • Do you own an ATV or UTV? 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.

Mount YFM200 engine at 15° for buggy


Recommended Posts

I am hoping one of you knowledgable people can answer this for me. I have a yfm200 moto 4 engine I want to put in an off road go kart. I would like to mount a sproket where the drive exits the case before the u joint so that I can get rid of drive shaft and make engine bay compact. To do this I would mount engine 90° to axle but would also need to tilt it forward 15° to account for the angle the drive exists rear of casing. Would that be ok? Would oil pump etc still work. Any advice greatly recieved.

IMG-20200504-WA0009.jpeg

Link to post
Share on other sites


while 15 degrees doesn't seem like much, i wonder if that would affect the pickup tube or oil draining back down the cylinder.  I would doubt there is a clear answer to that question.  Maybe take the clutch cover off, tilt it 15 degrees and give it a look?  Sounds like a neat project though!

Link to post
Share on other sites

That's great advice. Ill have a look behind the clutch cover.

It's to replace an old honda c90 engine we are currently using. Bit under powered and desperately need reverse in our property. 

 

Thank you again. Much appreciated. 

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 Tagged Content

    • By Anthony Marceau
      Hi everyone! I have a 1986 yamaha moto4 200 that's been sitting for a while! Cleaned the carb, replaced engine oil, put fresh gas in it. Got it running and went for a ride! It was running great just a little backfire once in a while! I barely made it home on the way back and now the bike won't run at all since then! It will start if I give a little bit of throttle but dies instantly as soon as I let go off the throttle! And even if I try to rev it up it'll sound like its not getting enough gas.. it revs up a couple hundred rpm's and backfires through the carb.. it almost sounds as if I was trying to take off from zero in 5th gear! Nothing is seized though! I dissasembled the head and the piston and cylinder are fine! Rebuilt the carb, replaced the ignition source coil.. I don't know what to do anymore.. compression test shows 90 psi Specs are 128 psi but i'm not sure if I trust my compression tester.. any ideas? Thanks!!
  • Similar Topics

    • By mpovah
      Hi all, new member here. 
      Picked up a really cheap non-runner last night from a neighbor. He had gotten it from someone else who had rebuilt it a few years ago and it has decorated his garage since.
      It is an early-90's (1992 or 93?) Suzuki LT250, but the weird part is the engine is a neon green color. I am now wondering if someone swapped the original motor out of this quad. Does anyone have experience with these that could give me a pointer as to what this could have come out of? I have heard that some Arctic Cat models had the same Suzuki motor - could that be where this came from? It is a 2WD, and has the typical chain drive/RWD system with both front and rear (rear drum) brakes. Very little rust and mostly complete, for the price I paid it isn't bad, but I am not sure how to pinpoint the engine type, and I would like to have that figured out.
      Just want to make sure what I am dealing with before ordering parts. I will need a carburetor by the looks of things, and air/oil/fuel filters, plugs, etc. 
      Thanks in advance for any help, appreciate your experience with these quads. 
      Matt
    • By wiwild
      Hello everyone !
      I'm currently rebuilding my carburetor on my Yamaha moto 4 350 1987, first time I rebuild a carb 😅 ! It was leaking fuel from the overflow and inside the intake ....
      When I took off needle (the platic top part was stuck like crazy) I had a spring and inside the kit there is a spring, an O-Ring and a washer. 
      Left is the needle that was in the carburetor and right is the new set (I already tried to mount it but it didn't felt right and I accidentally broke the o-ring)
      Anyway, I saw in some videos and diagram that there is no spring in here. So should I put the spring back ? And where ? On top of the needle or bottom ?

       
      This is an original Mikuni carb :

       
      Thank you ! Also if you have any additionnal tips please feel free to share I want to learn the proper way !
    • By pokolbinguy
      Hi All,
      Following on from the brief interlude in the "introducing myself" thread....
       
      In a nutshell, I acquired a YFM250 Moto 4 (1991) for cheap recently with the previous owner citing "no spark, needs a new magneto coil and I don't have time to fix it"... anyway I am dubious that the magneto/generator is the issue and thinking more along the line of ignition coil as after a clean up of the magneto I was able to get a rather decent voltage reading off the magneto with pull start and resistence readings seem to check out that the magneto is all ok (all 3 x phases = 1.2 ohms and no run to ground)
      None the less I ordered a new Ignition coil and Magneto/generator coil and am waiting for them to arrive.
       
      In the mean time I cleaned up the current Magneto, popped in a new battery and sparkplug, checked out all the wiring harness, all seemed good except I came across the "neutral switch" wire was broken.
       
      After wiring up a new neutral switch wire, the neutral light now comes on  (small win) and the starter relay (attached to rectifier) now clicks. If I hit the starter switch on handle bar the starter motor spins and if I  pull the cord starter I get a spark on pull....YAY!! I'll try and attach a video below if possible.
       
      So onto the starter motor. Starter solenoid seems to work A-ok, even if it looks crappy and starter motor spins as it should when I hit the start switch....but here is my issue.
       
      When the starter motor runs it turns Cog #1 and Cog #2 (see photo below)....but the chain in the back of the starter which I assume is the timing chain, does not move and there is no apparent movement of the piston in the cylinder.
       
      If I turn it by hand (per photo) or with the pull starter however the chain moves and the engine turns. However cog #2 rotates but not fluidly with the "Crank" (part I turn by hand) for the lack of a better word to use if that makes sense?
       
       
      Is there a grub screw or similar on Cog #2 that fixes it to the center shaft to make it all turn when the starter motor is run? Could there be a part missing? Previous owner had the starter apart so could be possible?
       
      The outer/front part seems to be on a key-way so not sure how to remove this easily to check how Cog #2 is attached.
       
      What am I missing here?
       
       
       
       
       

      spark_baby.mpg


    • 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.
    • By Arizona
      So my latest find is a Moto 4 250. Looked in good shape, started right up but would backfire and die upon acceleration but you 
      could get it to go if you were good with the throttle. I figured it was the carb. was a brand new Chinese carb, he didn't have original.
      I took it apart and cleaned it, only thing I found was some debris in main jet and the main adjustment on bottom was at 41 turns. Cleaned 
      it out and set at 2 turns, re installed. Starts up, runs better actually drove it but seems really sluggish, once I hit 3rd gear could barely pull
      it. Rechecked everything, even ordered a new carb as I had this problem with another atv but still same problem. Now I pull it apart and 
      decided to check compression, I show only 85 psi. I checked valve adjustment (after aligning up cam gear to mark on case). to make sure not too tight still right at 85 psi. 
      I assume I need to pull the head and look at the valves, Any ideas I am missing something?  motor does not smoke but is super sluggish. 
      The specs I find are off the downloaded manual of a 94 but figure should be the same. It states compression standard is 128  and Minimum is 114 and Max is 142
      Any other Ideas before I tear it down? Thanks in advance Az


  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...