A 100% guaranteed FAKE 26mm carb from Scrappy... with the Uni right off the end. Fake is on the left with the OE 24mm on right.. On my career build I've been gathering parts for I won't mess with a CV carb, a genuine Mikuni Round or Flat slide of maybe 26-28mm
Hey hey, what is this I'm seeing here, is that a TOCE style exhaust I see up there, and you didnt put a link...... lol I'm diggin it for sure, do they have silencers in them?, If not they gonna be loud as...... I doubt you'll need such a big main jet, and I agree no need for the 30mm carb. Do you plan to try a round slide carb? or back with the CV carb.
SD you sure do know your CVT systems and appreciate all the feedback from everyone, this is exactly what we need. To add to your previous post about grinding ramps and slider "channels" I also use it to manage the mechanical limits of the CVT. Also note that every almost every setup is different and has to be hand finished accordingly. I guess I should cut to the chase and actually put mods in. The first step I take is removing the variator faces and putting them together, I prefer to take it off the scoot. I place them face to face centered and put the belt on. Almost all the time for unmodified systems, the belt will not sit to the top of the tapered faces. here we see our first obstacle, this will limit our maximum attainable final drive and potential top speed. Conversely, with the CVT fully installed, if the belt doesn't rest on the boss (deepest between the faces), (not sure if this is ever the case) we are not able to achieve the lowest attainable ratio that will give the greatest torque. Ok so after typing up a storm with modifications I did, it is confusing to say the least without having a visual guide to make sense of things. I will have to prepare a few photos and add some arrows etc before I continue. My apologies for the delay.
Piston, what you running as an intake right now? And what size carb.?
Very true my elder brother... 28mm would be better, I think, but hard to find. But I will definitely will re-jet, tune, test before wasting money.
You know it Fifty, I know this goes against what Dan, and a couple more, have recommended but.... Very few builds, I come across anyway, have the original airbox's on them. Mostly likely will be going to a 30mm carb. when the weather gets warm, up from my 26mm.
Piston, Lol. See I was sitting here thinking I was a "good boy" in following orders, and you almost gave me a heart attack. lol. Yes re-jetting is going to be an absolute must, most likely going to the 115 main and 32 idle for a starting point and going back to my Uni pod filter.
Piston, The pipe? I was under the impression that it was a real one? I remember you told me not to get that other one that was fake a while ago. You even sent me a link on ebay but he didn't have anymore in stock for about the last 4 months. I know the pipe is straight from mainland China but I just thought I need a bigger one.
I did not see oil smoke, but the tail pipe is definitely black. We are starting to get into the Christmas Holiday seasons with all of the related activities so I will most likely be slow to respond with actions. Thanks for the responses. John. PS I went to my bookmarks for Dan's parts but it looks like the website no longer exist, does his parts site still exist or has the site been moved?
Definitely wet. sounds like she just fouls plugs in short order from being so rich. I see crosshatch all the way around the bore so I don't see a problem there, If your thinking its Oil does it puff oil smoke when you get it running? I would be of help if I knew what pilot and main jet number you started with and were it is at now, I would venture to guess you will need to lean both the Pilot and Main by numbers from stock and change the Needle clip position by two..
I don't know if it's just the pic, the one looking down at the piston in the barrel but looks like the barrel is out of round, may blowing oil past the rings, hard to tell, do the head test first, check the valve guides.
Actually, this is not excess gas but oil. I cannot figure out how it is getting in. I guess I can start with putting some gasoline in the cylinder head's combustion chamber when it is upside down and see if any comes out from someplace. I would think that if it was leakage from a gasket between the head and cylinder, it would also be leaking out of the engine, but there were no external leaks. . Beyond that, the only thing else I can see would be leaking past the oil ring. Any other ideas?
Yup running rich with the elevation, have to lean out the jets in the carb for sure, that's where fuel injection is way better for elevation changes, might be an idea to have 2 carbs, one for sea level and one for the higher elevation, might be easier than re jetting all the time.
Not sure if this is the correct place to post this or if it should go into the 125/150cc section. Anyway, over the summer we once again, did not get any use out of this buggy. I had it running fine (or so I thought) before we left (sea level) but when we got o the mountains (8,300 feet elevation) it started running very badly. I pulled the plug and it was very black. Thinking this to be the reoccurrence of a fuel jetting issue, I order a new carb and a jet kit. Not being sure of where to start, I just put the smallest jets in the carb (to change jets between test runs) along with a new plug and went for a short run as a starting point. No more than 5 minutes and I almost did not make it back to the house. I pulled the plug and it was very oily and was no wonder why it did not want to run. Since I had too many other things going on, and I did not want to tear the engine down on a gravel driveway, I just put it up for the summer. Today I took the head off expecting to see a burnt piston or hole in the top of the piston, but I cannot see any evidence of an issue. The walls look good, and other than being oil soaked, the piston top looks good as well. I could just order new gaskets and put it back together, but I really would like to understand what is going on before doing so, I do not want to go to the hassle of putting it back together only to find I still have an issue.