TRIKES:
1985 Yamaha YTM 225 DR Special Edition
Dirt Bikes:
2006 Honda CRF 250R
SLEDS:
2001 Ski Doo MXZ 600
1997 Ski Doo MXZ 583
Idk if this has anything to do with this but...Whn I pull it to start it I HAVE to use the decompression lever everytime or my arm gets yanked ahrd
TRIKES:
1985 Yamaha YTM 225 DR Special Edition
Dirt Bikes:
2006 Honda CRF 250R
SLEDS:
2001 Ski Doo MXZ 600
1997 Ski Doo MXZ 583
Once the chain is so old and stretched it doesn't matter how much you "adjust" it. The chain is now longer, even if by just a teeny tiny bit, than what its supposed to be. It's worn out and there for does not open the valves at the right time, and no amount of adjusting the timing, the chain tensioners, or the rocker arms is going to change that fact. When its worn out its worn out. Timing chains are worn out well before they actually break.
"Yes its broken, but does that really surprise you?."
"What happened? What does it look like happened?!?!"
how would i go about changing one?
TRIKES:
1985 Yamaha YTM 225 DR Special Edition
Dirt Bikes:
2006 Honda CRF 250R
SLEDS:
2001 Ski Doo MXZ 600
1997 Ski Doo MXZ 583
Crank Bearings Shot.
Thats definatley not lower end noise, did you listen to the video?
On the side note, im almost 100% positive a new timing chain and guides will fix your problem. Is this a 200 or a 225? The 200's chain tensioner doesnt automatically adjust you have to do it manaully and theres about 10 different little parts to putting one together. Trust me i had to buy them all seperatley!
To replace those parts you're going to need a top end gasket kit, new chain, new guides (Its usually the tensioner side guide thats worn the most but i'd replace both if youre tearing ti apart) and a little know-how. Its not a very hard job but it does require taking the head off to get the guides out. It's been probably 6 years since ive rebuilt one of these so i will let someone else chime in for the rest. Get a manual! It's your best friend.
Also if you're tearing it down to replace the guides and chain. Have the cylinder honed and put new rings in it. Also put the valve seals that come with the top end gasket kit in. This is going to be a big job, but its fairly simple if you have any mechanical know-how. I wish you luck and take your time! It will be worth it in the end.
Last edited by 85Tecate; 11-16-2009 at 03:08 PM.
Thanks Ill try adjusting the chain and if all else fails ill rebuild it, was thinking about it anyway...I know you guys all have your tricks to doing stuff, anyone have a trick for getting seized bolts out?
TRIKES:
1985 Yamaha YTM 225 DR Special Edition
Dirt Bikes:
2006 Honda CRF 250R
SLEDS:
2001 Ski Doo MXZ 600
1997 Ski Doo MXZ 583
Lots of patience! You can try heat, pb blaster, torque it a bit tighter then try losening it, Depending on the bolt you can hit it with awhile trying to losen it. If its a steel bolt in aluminum and its siezed you might as well give up because youre probably going to take the threads out with it....Cut it off, drill and tap would be your best bet in that case.
I was just thinking also, since your trike is smoking pretty bad.......that engine noise could just be piston slap. Thats awfully loud for piston slap but its a thought. If you tear it down i would replace the chain and guides also though for safe measure.
Ok well I just cant get this cam chain cover off i let it soak in wd overnight maybe that helpped
TRIKES:
1985 Yamaha YTM 225 DR Special Edition
Dirt Bikes:
2006 Honda CRF 250R
SLEDS:
2001 Ski Doo MXZ 600
1997 Ski Doo MXZ 583
Those are philips head screws if i remember correctly arent they? The way i try to get those out when theyre siezed is to hit the handle of the screw driver as im trying to loosen the screw. Sometimes works, sometimes doesnt. They make a nice tool specially for stubborn screws like that. You actually put it on the screw and smack the end of the tool with aand it turns it when you hit it.
Here is what im talking about. They work incredibly good... http://www.harborfreight.com/cpi/cta...emnumber=37530
Ok ill give that a try...wow i never seen one of those impact screwdrivers and i was just at harbor freight lol
TRIKES:
1985 Yamaha YTM 225 DR Special Edition
Dirt Bikes:
2006 Honda CRF 250R
SLEDS:
2001 Ski Doo MXZ 600
1997 Ski Doo MXZ 583
I had one screw coming and then it just stripped this is so frustrating
TRIKES:
1985 Yamaha YTM 225 DR Special Edition
Dirt Bikes:
2006 Honda CRF 250R
SLEDS:
2001 Ski Doo MXZ 600
1997 Ski Doo MXZ 583
I use a set of removal tools very similar to these: http://www.sears.com/shc/s/p_10153_1...=stripped+bolt
They actually grip the head of the screw not the thread and have a reverse twist that digs into the screw head and twists it out. *Be carefull as these have a bad habit of twisting the head off if it is really stuck..lol so PB Buster here is your friend*
Mine are crasftman but these are very similar (Blue set) with the (Red set) being what the head looks like that removes the stripped screw: