DeadBattery

Nvm I got it out, I'll probably put it on my bike tomorrow after cleaning it out, and I'll tell you what happens.

I just bought them myself, but they're not left handed ones, so what should I do now.

Alright, my friend is getting some this Friday, and I'll probably work on it Saturday morning or Friday afternoon, I'll tell you what happens when I do it.

Can I just use regular drill bits, since the streets are flooded since the hurricane.

Alright, I'll stop by harbor freight today and see if they have them, and what do you mean twist it into the hole, do I pick the the bit that fits the tightest and drill into the hole itself and then back it out?

I got the carb, and it turns out the dude decided to break one of the jets, and I tried hitting it, but it's aluminum, so it's gonna break every 2 hits, and I was wondering what's the safest way to go about this, should I drill it out or what.

I ended buying one off ebay it was an oem one, or so it was stated, it looks like it has all the keihin logos on it, and says it's for a trx400ex and looks identical to it, but I couldn't read the numbers on it, so I'm hoping it's the right one, cause it was 165 which if it is the oem one or works then it's a huge steal, since ive seen some go for 200 bad condition all the way to 400 brand new, since I went to a shop the other day and they are saying that it would cost like 800 bucks which is insanely high, but it should get here on Friday the upcoming week, and I already bought am all balls rebuild kit for it.

And the battery was dead, so it didn't have enough power to actually turn it over, so that's why it didn't even pop.

On 8/14/2023 at 7:19 PM, SlammedRanger said:

Sorry spent the whole last week at Loretta Lynns for the pro atv national. If it doesnt even pop on starting fluid you got a spark issue almost no doubt. Start with that. If there is spark i would check compression next. Maybe timing chain is just broke? With all valves closed? Can you feel a pulse out the exhaust? Maybe the starter clutch is bad and its just free spinning and not actually cranking over?

I'm having a guess that it's the carb, since I sprayed starting fluid into the carb while turning it over and it popped, but idk if I would have to buy an oem, or a rebuild kit, sorry for the late response, I've been busy with other stuff. But everything else should be good since I've replaced most of the components since I've gotten the bike.

Turns out the valves just needed to be wire brushed, ran fine after and he traded it.

A little backstory from what i know, my buddy had his top end rebuilt, he broke it in, few rides later his coolant hose comes off, he lets his cool down, and he starts trying to go home, in the end blowing it up, there was scarring on the cylinder wall, metal chunks, piece of the piston broke, the valve has like some build up on it, and they look old. I'm rebuilding my buddies honda foreman 420 4x4 and after battling with the wrist pin on the piston, I put it back together, everything right, I turn it over, and it didn't start, I sprayed starter fluid in the cylinder, it backfired out of the airbox, and the reason I'm guessing is the valve is ceased, I'm not sure if it's the rod that's coming off or if the valve is ceased, when I turn it over I hold the rocker arm and it doesn't move up or down, but I don't know how to check if it's the rods falling out. Is there a way I can check if the valves are ceased or the rods are coming off.

I put a 45 and a 180 in, it didn't start, but I sprayed starter fluid and still didn't even fire, so I'll check spark, but if it has good spark, what should I up it to, I only have a 180, but I have up to maybe a 55 give or take, which I doubt I would have to go that high.

Because I'm trying to spend as little money as possible until I get it running, and when I get it running, since it's pretty much a project. And this is totally unrelated, but the black crush gasket between the cylinder and the crankshaft looks like it's melted or something, I will try and take a picture next time I go out there, until I get some storage space in my garage.

Is there any company that sells an aftermarket carburetor that works good, that isn't expensive as the oem one, and I'll try a 45 or whatever jets I have, and use a 180 like you suggested, cause I have to wait for it to be delivered which will probably be this Friday or around there, and can I just buy an all balls rebuild kit if it is a bad carb?

Recently got a big bore 440 kit for my trx400ex with a stage 2 hot cam, and I threw a amazon carburetor on there, everything else should be right, I gave it to one of my brothers buddy's and he said he was able to get it running, and I'm guessing he threw a different carb on there, because the guy said he could get it running with putting gas into the manifold, I haven't tried that yet but when I do get out to my old property then I'll try that, but I need some help with what jetting I should be running, I've mostly seen people running around a 180 and a 42, I think I have something like a 170 and a 42, and wondering if it's the carburetor itself or the jetting, since ive heard amazon carbs aren't it, and I don't have the old one, and I don't want to spend 200-400 dollars on an oem carburetor.

I'll try that In a couple hours when I get home with some fuses.

It has incredibly weak spark, but do you or anybody, have any idea how to test this coil, and what it's supposed to read?

I tried that a couple times and it looks like there is spark, but it looks weak, but I don't know if that could be the spark plug of the ignition coil, or something else.

I'm gonna try and go to my other house tomorrow, and try and put the new jets on and put a new spark plug in there, since I'm in the process of moving and the garage is cluttered with boxed and stuff as of right now, so I've been trying to make time between my job and moving. Also, if I spray starter fluid into the manifold should it run for a little, since it still didn't start when I did that, and so I'm leaning towards not enough compression since, but the last time I did a test and it read out 120, but it's either compression, spark, or timing, but I triple checked timing and I think I can knock it off, but is there anything electrical that can prevent it from starting that I should check, since I checked the cdi and the ignition coil, but I have no idea what I'm looking for on the ignition coil, so if you or somebody can tell me what I'm looking for on it that would help a lot.

Yeah I wasn't sure, the jets had keihin on them too, but yeah I'll try to find a store near me that has jets, I'll try and run a 50-55 and I have a 170 already in the carb, but I'll try going up on the jets. But I think it might be the timing honestly, or it's just not enough compression, since i sprayed starter fluid in the intake manifold, and still wouldn't start, I heard niche is unreliable, but I don't think they would be so bad that you can't even get your engine started only after two starts.

I had a Kei-hin carb on there, but it really just needed some new screws and a seriously good cleaning, but I used the jets in that one, and they fit in the Chinese one I have, but I'll order some and see.

I'll try and get some jets for it, if you have any suggestions for what kind of jets I should get and what brand. I also flipped the cam back the way it originally was, when it first started, and if it's still not starting I'm gonna send it to a buddy of my brother, and see what's if they can diagnose the problem. This is my 2nd ever quad, since I started out on a blaster for beginners, then I got a 400ex, and I've been learning on the way.

I timed it with all the cams facing down, and made sure the lines on the sprocket stay lined up, the metal shavings coming the cam chain constantly grinding against the wall of the valve cover and all the way down to the head and the cylinder, but I replaced the cylinder, and cleaned most of the shavings up. When it first ran it was idling ok with a 38 and a 170 jet, but I'll get new jets for it, and a new spark plug, since that spark plug it the old one I ran.

But it had around 110 compression, probably only cause the rings haven't seated yet.

19 minutes ago, Fishfiles said:

How about some more history. I take it has never run right since rebuilt ?   And it has only ran twice for short periods  ?   Did it rev up ok? Idle ok? 
 

Do you have a compression tester.  Test the compression , you might find timing is 180 degrees out. Quick test that tells a lot.  

So a couple months back I rebuilt it, since the cam chain tension failed and came off, and when I opened it metal chunks everywhere, some gasket maker, that wasn't even on correctly, so I put the cases in degreaser and water, dried them, I did new valve, put a stage 2 cam, then had a big bore for it, put it all back together. First startup and it ran, but there was valve tick, so I adjusted them, the next day it was gone, but I never drove it or let it run, and the next day I go to ride it, and it didn't start. I then tested the cdi box, some of the terminals were shorted, I replaced it still didn't run, put a new stator on there, since my lights were dim prior to this, and the stator was going bad, I put a new wiring harness on, and a new starter, I also put a Chinese carb, that I never adjusted, until now, and I come to find out the timing was off a couple teeth, so I'll try flipping the cam 180 like you said, and see if that works or not, but if it doesn't it is most likely not getting enough air, or too much gas, since you earlier said it's running too rich, but that was the old spark plug, so I'm gonna run to the store soon and get another spark plug, just to freshen it up.