00' Blaster won't start, Pictures!
 

Firstly, I'd like to know why my orignal thread was deleted without notice. People were helping me and giving me good advice. If someone knows please let me know why. As it has me a little peeved about it.


Anyway to get onto what I'm trying to figure out is why my 2000 Yamaha Blaster isn't starting. Basically what my setup is:

2000 Blaster
CT full exhaust
Power Reeds
Pro-X STD piston


I bought it for $600 from a friends cousin and I just got it. While taking apart the engine tonight I was taking pictures, so I could get your guy insight on maybe what's going on. First as I was taking it apart I noticed the top head only had 4 of the 6 nuts on to hold it in place, probally one of the causes for the engine to only have 120PSI compression. Also as I took the top off it looked like a noticable amount of black oil was on the outside of the top end, more on the side of the engine that faced the rear. When I took the exhaust pipe off alot of the black oil was in there too. Next when I opened the engine up and looked inside there was some red oil in there, maybe this is some of the pre-mix oil? Also the engine is getting spark because I took the plug out and it was arching good. If anyone has any insight, that would be awesome. Thanks and here are the pictures I took.

Oh yeah I just remebered that the front wires have alot of plugs not connected, I took a picture.



Airbox
Head
Head2
Head3
Lower
Piston
Piston2
Reeds
Rings
Sleeve
Sleeve2
TORS
Wires

00' Blaster won't start, Pictures!
 

Two forum members ruined your thread and what was written had nothing to do with your question.

00' Blaster won't start, Pictures!
 

It seems as if though the atv is ridden in a lot of water/mud conditions given the interior of the airbox. Also noted is that the K&N filter does not have any oil in it. It is highly likely that water got past the filter and made its way into the engine. At this point, I would leave the cylinder off of the bike and let any water that may be in the crankcase evaporate.

The unconnected wires seem as if though they would be for the voltage regulator wich appears to be missing in the picture. I do not think that this is too much of a concern as the part should only prevent "flickering" in the headlight when the light is on.

The red oil inside the crankcase is the color Bel Rey gear oil. There may be a leak between your gearbox and the crankcase. You can do a leakdown test to discover if there is a problem there. Doing a leakdown test requires some special parts and is perhaps best handled by a local bike mechanic.

Essentially a leakdown test is done by pluging up the exhaust and intake of the engine (with the cylinder attached to the case), put the piston at bottom dead center, and fitting a leakdown tester on it.

00' Blaster won't start, Pictures!
 

Thanks for the info curiousZ, So if the gearbox is leaking into the crankcase it has to be doing it threw a bad bearing probally then? Im just hoping that fixing this machine isn't going to be a nightmare.

Also some added information about the piston. I dont know if oil was coming up and threw the engine before but the engine was all apart before and reassembled to install new rings on the piston. So im guessing that all that oil is just from trying to start the engine and when it did a few times it would just floods itself out and die. Also just wondering, do any of the parts I look spics of look overly worn out or is it just normal ware? (piston, sleeve, carb/tors, etc).

-Scott

00' Blaster won't start, Pictures!
 

It seems to be normal wear and tear on the piston, sleeve, and the carb slide. As for the black oil, it is quite possible that it could be from the engine receiving too much fuel and not burning it.

If the red oil is coming out of the crankcase, it could be as simple as replacing the gasket - or there could be an actual crack in the case which would be expensive to have fixed, in addition to whatever caused the crack. Supposing it is just a gasket, it should be relatively cheap to fix.

Try to make sure that nothing falls inside the crankcase as anything that makes it in there may damage the engine in the future.

I hope everything gets resolved at a reasonable price for you.

00' Blaster won't start, Pictures!
 

BombThreat.
Sorry for getting your thread deleated, I was talking with another member and it got out of hand, again sorry for the mishap. Anyways, back to your blasty.
What I see from those pics are a couple things that worry me. First off I would take the time to clean out that filter. It dosn't seem like much, but on a 2 stroke the slightest thing can cause a larger problem. BY looking at those pics I can almost tell you exactly what your problem is. For one, your head gasket is leaking. Most people think that a leaking gasket automatically means lean, but the head is different. A leaking head gasket does just the oposite, It richens it up. You can tell that it has been blowing gas and oil out through the head gasket all over the head surface. Make sure you get all the head nuts back in place. Torque them using a criss cross pattern to exactly 20 lbs.
Its hard to tell from the picture, but those marks on the lower part of the conecting rod scare me. It looks as if it might be rubbing on somthing. Your connecting rod should be that solid copper/brown color but on your down at the bottom it is worn, and now looks silver. Again, I might be wrong but just check it out to be safe.
Like curiousZ stated. There is a leak between your trany and your crankcase. That red oil is bottom end oil, 10w30. Did you put some down inside the engine when you were talking it apart, or was that already there?
Take off your side cover on the left of your motor. This is the cover that hides your clutch, counterbalancer, kick started, idler gear, and your primary drive gear. There are 2 gears on the end of your crank. They are on the lower right side of the clutch. One gear is larger and runs the balancer shaft, while the other connects to the clutch housing. This is where your crank is connected to the bottom end. The hole where your crank come out through into the bottom end has a main bearing on the inside and a seal on the outside. Having a defective seal will cause your motor to suck in oil as it's running.

These seals tend to go after a couple of years. I had one let go on me about 3 months ago. I could start the bike but like you it would only run for a moment. Thats beacuse it takes a little while for the oil to build up on the plug, then when it does it fouls. This expalins why you have a access of oil in your motor and on your head. This seal can be seen without actually taking the gear off. Drain the oil and remove the side cover and check it out. Im almost willing to bet thats your problem, along the with head not being tight, and the dirty air filter.


Tell me what color wires are not connected and where the general direction of them is heading, or where they appear to come from and I can tell you what they are. There are alot of wires under there that don't really have a big importance for the motor working. But like i said, based on their color we can figure out exactly what they do.

Hope this helps
Shav0

00' Blaster won't start, Pictures!
 

Wow guys, thanks alot for all the help. Expecially Shav0, you explained things so well that checking things out is much easier for me. I will go look at everything you said and take pictures and descriptions like before. Thanks[img]i/expressions/face-icon-small-smile.gif[/img]

00' Blaster won't start, Pictures!
 

No problem dude. Thats what were here for. If you need any more help, let me know

Shav0

00' Blaster won't start, Pictures!
 

Hey guys, I took the tranny apart and while doing so I noticed there was alot of the same oil on it as was on the engine. I'm thinking it probably was just coming from the top-end but I took a picture anyway to see if you guys think different. Also one of the two hoses that go from the tranny cover to the oil tank in the back of the machine looks to be cut (is this bad?). Now when I took the outer cover off the tranny cover it was filled with water, I mean it just dumped out as I took it off. This wasn't the actually transmition it came from but some electrical thing was in there. I have a picture of it also. When I took the tranny cover off it had no gasket on it and had a fragment of one inside of it. Also this has go to be bad... I noticed a overly good amount of was look like dirt fragments on the cover and some some on the outside of a gear. I took pics of this so you guys would know exactly were it is and if you think it has messed anything up. I think thats about it for now. I did forget the checkout the wires, I'll do that tonight when I cleanup the garage.
Oh yeah I forgot to add that I couldn't find the oil gasket you were talking about. If you could point out were I should look from the pics that would be awesome. And I looked at the crank again and the silver part looks normal from the factory, its just on the outer edge.

Crank
Crank2
Gears
Gears2
Gears3
Gears4
Gears5
Gears6
Hose
Tranny(water was here)
TrannyCover
TrannyCover2
TrannyCover3

00' Blaster won't start, Pictures!
 

Bomb threat,
That red oil is soupoed to be in the bottom end. Its the lube that goes into your tranny and lubes your clutch. It does look quite dirty, but I don't think thats the problem. In the picture titled "tranny, water was here" are those the hoses that appear to be cut? That is your oil injection pump. ONe of those hoses comes from your oil tank under the rear left fender, and the other goes into your carburator. If either one is cut then you have a major problem. The cover that goes over top of this isn't protected with a gasket. Sometimes it does get water and dirt inside. The best thing to do with that is use some silicone gasket sealent to keep debris out. The main cover that covers your clutch, primary drive, counterbalancer, and kick starter should be covered with a gasket and remain tight. Having water or other debirs get inside could cause some major problems. I would replace this gasket and again use sealent on it.

Look at the pic "gear4." On the left is your clutch housing. There are two gears on the right. The larger one on the back is your counterbalancer gear and the smaller on in front is the primary drive gear. Behind this is the seal that leads into your crankcase. If this seal is broken it will cause oil to be drawn in during the vacumn caused by the upward motion of the piston. Seeing how you have alot of dirt inside the clutch cover maybe some of this dirt broke the seal and that is why you are having problems.

Also, I am still very worried about your rod. IN the pic "crank2" you can see damage to the rod where it attaches to the crank. This should defently not be like this. I am still sticking to my origional theory of the bad seal, however this bike shouldn't be run without getting that rod checked out. Somthing inside is rubbing against that and could cause some serious damage.
Let me know what color wires they are so i can help ya out with them. Like I said before, some dont even need to be pluged in, but its always good to check.

Hope this helps
Shav0