Put new top end on except for valve cover new piston jug was bored 16 over and the piston fit perfect but had issues with the oil ring on it guy said it was to long so he cut it a little bit and it fit put it all bacm together and I had issues getting it started turned out to be a timing issue and the vales were to tight got all that fixed started it and it is smoking something awful please help its a constant smoke !

2005 Rincon
I had to replace the brake lines on this bike I bought because some fool cut the line.
I pump the handle brake and it builds pressure then crack the bleeder nut at the wheel and brake fluid squirts out(both sides over and over).

Pump handle brake again and it hardens but when I leave handle alone for a couple secs, all the pressure is gone.

Is it because I still have air in the lines?

2005 Rincon
I had to replace the brake lines on this bike I bought because some fool cut the line.
I pump the handle brake and it builds pressure then crack the bleeder nut at the wheel and brake fluid squirts out(both sides over and over).

Pump handle brake again and it hardens but when I leave handle alone for a couple secs, all the pressure is gone.

Is it because I still have air in the lines?

I just became the owner of a used 05 TRX250EX, when I got it I did my usual for all vehicles I come to own used, I gave a front to back motor/carb clean and changed all the fluids. I went to start the ATV via jumping it (Old battery was dead) an while i could get it to start on starter fluid it would roar up and die down real fast. I went to check the fuel line to make sure i had the tank in the ‘On’ position but even in ‘On’ it only barely dripped. At this point I am a bit confused on how to continue

First off I bought this quad from a buddy who said it needed a new top end so I put a new top end on it with new jug bored 16 over and new namura piston had it timed tried to start it after the rebuild and it wont fire cleaned carburetor and its getting fuel and air and has good compression changed sparkplug and put new ngk universal cap because it wasn’t snapping in all the way it will turn over but wont start electric start works lights work neutral light works and key switch works PLEASE HELP!!!!!!!

So I did a leak down test on my 400ex that has 30- 40 hrs on rebuild as it’s smoking badly and I have air blowing through carb and also through bottom end where timing inspection cap is .could it be 2 issues intake valve and rings ?? And how likely is it for both to go at same time with the hrs on rebuild. Also did a comp test and I’m getting 175-180 which I would think rings are good .any input would be appreciated

Trying to remove my axle to replace the bearings on my 2002 300ex and the hub nut as well as the axle nut are stuck on there like crazy. I soaked them both in wd40 and the axle nut I have a pipe wrench with a 2 foot pipe as leverage but nothing’s happening. Any advice on how to get these things loose?

Not sure how to attach images as I’m on my phone. Will post some once I go inside.

I have a 350 4×4 with 24x9x11 rims all the way around. I’m looking to get bigger tires but I also need new rims for the rear. If I get 12 inch rims will the brake drum still engage.

I have a 2001 honda trx400ex (factory effex) if that means anything, and im hearing an awful grinding noise when turn the motor over. I took off the valve cover checked the timing and the tensioner (Which is shot), and the spark plug. While i had it off i thought ill turn it over just for kicks, sure enough the sound was gone, it had next to no compression when i put my finger over the spark plug hole though. so i put the valve cover back on and adjusted the valves and turned it over and the noise was back. I had the rocker adjuster caps off and looked down in there and turned it over and the valves wouldnt complete a full cycle it looked like they were having a seizure. the Cam decompression mech was spinning and jumping around and if i put a screw driver down in it i could get it to stop and turn over it would turn over fine no noise, still no compression though, im at a loss any ideas and help would be greatly appreciated.

Before I get into it, I just wanted to see if anyone had this similar problem. When riding it seems to do fine. It’s just rough idling and popping. I adjusted the air intake screw and he helped nothing at all. I was told the carb had been rebuilt quite recent. Here’s a video.

https://www.youtube.com/watch?v=fkW7OolfG8o