I have a 93 300ex. Runs great , rides great,
The left engine case is cracked . The lower rear motor mount area has a crack that goes from the bottom of the case (next to the case bolt )up around the motor mount boss of the engine case , and across the back to the case half ( which is above the motor mount .What caused this I don;t know.The chain did not break either to cause this.
Other than this I think it is a great atv.

 

were you riding it really hard or somthing? i wouldnt be riding it very hard.

 

Well ,sometimes I ride very hard.I live in the mountains of East TN. I was jumping it , getting around 3-6 ft of air.The only thing I can figure is I landed hard one time on the right rear wheel.I am 6ft 215lbs.think that did it in. I have the motor out now and am in the process of repairing it. I have found no cracks in the frame.
I hope to have it back in by this weekend.
GO RIDIN'

 

nuthin happened to mine except hoe bad it puts down my freinds mojave

 

The only problems I have ever had with my 97 is the shcok broke.(down at the bottom where it mounts to the A-arm)And the plastic cracks o easily.But to tell the truth I would rather play on it than my race 250r.They are great machine's.The stock tires suck!!!!!I put some 20/11/9 6 ply razr's on ITP .190's on mine. They are awesome tires and really help performance.I did have to replace the rear brake pads. I used a micrometer to measure the thickness and it was fine.I replaced them with premier brake pads.

And oh yeah the plastic on the handle bars suck to I am going to get some renthals and relocate my key and put my 86 trx250r's stock headlight on.

 

On what wires (where) would you put the silicon, because I have the same problem with my 300ex in water. It stalls frequintly in deep stuff.

 

I have had some of these problems also. The reason that everyone doesn't have these problems is because the way that they ride. I'm not going to say anything else though.

 

how high could you jump the 300ex without hurting it

 

I have jumped 10 foot off the ground and not hurt it.I did hit the caliper up against the muffler and bent it before.

 

the only problem with mine i have had is the bearings...i didnt get em fixed quick enough about 2 wks and had to get a new axle carrier too! i ride VERY hard just about every day with it too so i am very pleased with it. to the jump question...i have cleared 35-40ft table tops w/ no problem and i shoot up this wall and get about 10-15 ft of air. the only thing is i bottom out occasionally but everything will bottom out once in a while!