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Discussion Starter · #1 ·
I bought a brand new 2 stroke x7 a few years ago and didn't ride it much. Now this year I got it out and got a ngk plug for it and had to change a valve stem. I'm also going to mix some Amsoil when I get it rolling.

Now my problem is the rear wheel is easier to take off then to put back on. Is there a trick to getting it on? I have the longer spacer on the sprocket side and can't get the chain tensioners in the frame. When I try to slide it straight on in the frame, the spacer on the sprocket side catches the frame and is stopped by it. I didn't see any tips when searching by the way.

Any help is apreciated because it's all I need to have it running again.
 

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Discussion Starter · #2 ·
I'm probably gonna give another go at it today with an extra set of hands.

I just don't know why there isn't just a hole in the frame where the axel can just slide through like a dirtbike. And yea I work on dirtbikes all day no problem usually but I really can't figure this one out.
 

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The tensioners, are they alum w/ a bolt out the back. Should slide right inside the rear arms at the back. The is a bearing spacer inside the wheel between the bearings that can keep the axle from going thru if it is not centered in the rim.
 

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Discussion Starter · #4 · (Edited)
Edit: Actually now that I (finally) think about it I don't think the bearings are fully pressed in lol

I'll try tapping the bearings in that should be the problem because I never used a mallet.
 

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On my Cag engines I put the cases on soft wood, and get a socket that fits the outer race of the bearing, and carefully pound it in. I have a dead blow hammer w/ soft & hard tips on it. Have to hit in the center, and make sure the bearing is going in straight. If it goes sideways its no going to go in or damage the cases. The wood softens the force on the cases. If the bearings are Bad, I use that same hammer, and pound the middle race to remove them. I have heard of heating the cases and freezing the bearings the max then go in easier.
 

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Discussion Starter · #6 ·
I have the axel going through the wheel because you have to have that spacer in the middle of the wheel. So that's what makes it hard about tapping em in straight. And they always want to go in crooked. I'll use a socket and a washer and try to tap them in straight sometime soon and let ya know how it's going.
 

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Discussion Starter · #7 · (Edited)
Okay so I went over and worked on my little bike today! I got the wheel put back on! :D

I tried tapping the bearings with a socket and hammer and I didn't get em all the way. So I had my dad help. On a bench, i put the disc or sprocket on 2 2x4s on each side to hold the wheel sideways. It took a couple of tries and couldn't get it mounted so they still weren't in. A few medium taps on each side later, they were in and everything bolted up first try from there, we got the brake quickly bolted back on, and got the chain nicely adjusted. I greased the bearings and axels a couple weeks ago too with some Maxima Waterproof Grease that I use on my dirtbike. I might get around to doing that on the front sometime too. :thumbsup:


Edit: I don't have the spring for the throttle so I need to find the original or find one that works. Then just hook up the throttle cable and put my new NGK plug in.
 

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Discussion Starter · #9 ·
Okay I got the throttle all hooked up except for at the carb because no spring yet. Anybody know what size spring I need?

Also today I put the new plug in. and I confirmed my sprocket is egg shaped because when I roll the bike, the chain slightly gets looser and tighter. I hope the chain holds up and doesn't reduce performance. Don't know why the factory sprockets are like this.
 

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Because they are made in China... ;)

As for springs visit the hardware store and find the spring drawer.. You'll see one that should fit.. Just dont get a super hard spring..
 

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Hardware store, or bolt store is where I get mine.
 

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Discussion Starter · #12 ·
Yeah I'm probably going to have to do that then. My friend went to autozone and they didn't have any. A lot of hardware stores in town went out of biz too. The yamaha dealer also sold me yamalube injector oil when I asked for premix. So when I have time I gotta find synthetic oil and a spring still. It could be another week or 2 before I get a chance to get these little things. p!sses me off I have to wait being this close after all the work, time, and money I have invested.

And I was emailing pocket bike parts and they said that the spring comes with the carbs when I asked them for a spring. I follow up telling them that I ordered a carb and I think they forgot it. So they reply and act like I'm lying about a 50 cent spring. They also on their site have tubes labeled for the X7 fs 2 stroke when I've yet to see any tire take a tube. So next time I need something I'm going to try another place cause I'm not too happy about buying a tube that's wrong and taking it to a shop to spend more on a valvestem because it's tubeless. And the carb I ordered was missing the spring. so buyer beware. Makes me think people on here are advertising them too. One thread i read was about a broken idle screw (which was the reason behind this whole ordeal) and someone said "just buy another carb" and by the time I do that and get to changing them, I find out there's another idle adjustment on the throttle cable by the carb I could've just adjusted.

So these are just some footnotes. There may be a small chance the spring was in the bottom of the box and got tossed but man I think I went through all the packaging. and I think it would've been taped to the carb or in the plastic with the carb.
 

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Discussion Starter · #15 · (Edited)
Sounds about right. I'll check that site out.

And I just got back from lowes. No spring drawer. just the kind with hooks on the end. :confused: Anybody on here got an extra that would work?
 

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Davesmotors online has all them springs and stuff for Walbro and copy carbs.
 

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Discussion Starter · #17 ·
My carb is stock. I need to make a vstack and hook up the filter I have or do something about a better air filter.

Today I bought a half full bottle of Spectro 100% synthetic mix oil off my buddy for a few bucks. Should last me a good while and do the job. Might mix at 36:1
 

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My carb is stock. I need to make a vstack and hook up the filter I have or do something about a better air filter.

Today I bought a half full bottle of Spectro 100% synthetic mix oil off my buddy for a few bucks. Should last me a good while and do the job. Might mix at 36:1
Golden Spectro synthetic @36:1 is too much oil unless your still breaking the engine in.....You can safely mix the stuff to 50:1 and that will make the oil stretch a bit more........Also use premuim fuel of atleast 91 octane and no lower.......
 

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You need a good pipe so the engine can breath.
 
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