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By KIWINZ
Hello
My son scored a free Moto4 - late 80s from the looks of it. I don't know anything else about its history as the owner wasn't there when i picked it up. Can't see the VIN number as its a bit rusty. He cleaned the carb and then with some either it started and still starts first pull. Its runs really nice - not rattles etc. Goes forwards well and the brakes work fine so it looks like a keeper, However, we have only managed to get it into reverse once.
1) it won't shift down into what seems like where first would be - 2nd and upwards only. The changes between gears is fine. No crunching or missed gears - just no first gear. 2nd gears appears to be as low as it will go
2) the clutch - when you hold the gear lever up or down works (only the second ATV we have had. Other is a Quadrunner which doesn't have this feature)
3) no neutral light - will start when no in neutral - should it do that?
4) the one time we did get it into reverse the neutral and then the red (reverse) lights worked. Swapped easy between forward and reverse - when it went into second, it didn't return to first or neutral
5) checked the clutch adjust on the RHS - seemed fine to me. When i turned the screw back 1/8 it was where it was to start with. Clutch doesn't slip. The bike will move forward is all gears.
Any help would be appreciated
Thanks
Andrew
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By tin
A few weeks ago, I foolishly asked my girlfriend about a quad that's been sitting under a tree at her parents' place for 25 years... This thread will be a sort of log of my attempt to resurrect it. I'm actually a computer guy, not a mechanic, so this will be quite conical for some of you, I'm fairly sure 🤣
So far I've found out it's likely a 200. Not sure what year yet... The frame has a serial of 53J-001343 (I think). Engine appears to have the same number.
We inflated the tyres on Saturday, which were still up today, so that seems a win. This also confirmed that the wheels do turn, as it rolled back into its 25 year old indentations as the 4th tyre started coming up.
Oil looks used but otherwise OK. I'll change it if I actually get it running, but looks good enough for attempting to start it up again.
Fuel tank had.... something in it. It smelt more like old stagnant water than fuel of any sort. Drained that out and flushed some clean fuel through to be sure.
Fuel tap was jammed in the off position. WD40 and some force got it free. Did that after the fuel hose was off, so hopefully the carb isn't full of whatever it was in the ttank.
Engine turns fairly easily with the rope start. Made typical exhaust puffing sounds.
Unfortunately the rope mechanism was not fully rewinding, so I was limited to about half its length... And today it jammed fully pulled out. I attempted to remove the rusty screws, but one stripped it's head out. So for now the rope rewind is jammed.
Spark plug connector seems possibly burnt inside. Black crap on both the plug and up in the connector, and the connector doesn't seem to actually stay on.
Throttle lever is stuck fast. See photo for possible reason... Cable also feels jammed. I assume the throttle itself is jammed. That'll be fun given my skill level.
Electrical stuff all seems dead. No headlights. No starter. No indicator lights. Could be a fuse. Could be bad connection. Not something I'm too worried about at this point.
Front brake handle works. Parking brake clip thing was bent out of shape, but that's now fixed and working. Front brake only works on one wheel. Other one seemed rusted in place (off). WD40 and hammer got it free, although still stiff. Cable might be broken as it doesn't move at all when the handle is pulled.
Rear foot brake works but needs adjusting.
Other handlebar lever doesn't budge. Not sure if that's a clutch lever or rear brake... If this is the 200 version, I gather it's got a centrifugal clutch so it would be a brake lever... But I'm not yet sure exactly which model I'm working with. And the cables all disappear under the plastics and fuel tank and I didn't bother trying to trace where it goes yet.
Thats probably about it for this post.
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By Baldwin
I’m brand new to 4 wheelers and just bought a 1987 Yamaha Moto-4 350 4X4 to use for hunting. I say 1987, but not positive. The owner is not positive about the model year, but he said 1987 sounds about right. He also gave me his son's Clymer manual that covers 1987-1999. The frame has rusted just enough that the full serial number is no longer readable. I can read some numbers/letters, but it is spotty. Anyone know how to determine model and year if you cannot read the serial number? I have included photos.
So it started fine when I got it home, but it would only stay running if the choke was open even when warmed up. No identification numbers are stamped on my Mikuni carb to determine specific model. The choke is controlled by cable connection on dash, so it is not a model that has the choke lever right on side of carb. Since it would only start and run with choke open, I decided to rebuild the carb using the OEM rebuild kit. Took it apart, cleaned jets, orifices, replaced o-rings, gaskets, etc. After reinstalling the carb, the engine will still only run with choke open, but now the engine sounds like it wants to shut off and there is a consistent low volume backfire from the muffler. If I rev the engine, it sounds better, but still continues backfiring.
The fuel screw was seated at 2.5 full turns before I cleaned it so I put it back at that setting.
I’ve looked high and low trying to find a video of someone rebuilding my specific carb, but it appears there are many variations. Appreciate any guidance to get it back to running like it should. I have included photos.
Any guidance on figuring out model year would be greatly appreciated.
Thanks for your time.
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By tds7
Do any have any experience replacing 2001 Big Bear 400 Front Differential Input Shaft bearing and seal. Getting ready to buy one but the seal and bearing are bad. Any help would be appreciated.
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By beast6228
I've been trying to piece this Lakota 300 back together, slowly. It's been a rabbit hole however. I replace one thing, then it leads to replacing other things. Anyway, When I got this thing I noticed that the hose coming off the camshaft cover wasn't attached to anything, it was just hanging loose. (It's literally just a foot long hose attached to nothing) I figured since it was venting the head it would be ok and I am sure it is.
However, last night I was looking at the service manual and noticed that it mentioned that this atv has a crankcase breather tube as well. Mine does not have one, so I looked at Partzilla and looked at the parts diagram and sure enough, it's definitely supposed to have one. The problem however is, the service manual does not show how it hooks up and the parts diagram only shows the exploded view of the assembly. I just find that kind of strange, nowhere in the manual does it show how it connects. Does it have it connector, attach to a nipple? It just doesn't say and it bothers me that there is a hole there without anything attached to it. If anyone has a Bayou 300 or Lakota 300 with an intact breather vent system and could possibly take some clear photos of it or know how it connects I would be very grateful. I have searched high and low and cannot find any information on it.
Thanks
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