I was workin on the valves last night, and the chain fell off the camshaft. So i put it back on but now the bike doesnt work. :cry:the bike doesnt even turn anymore. I think the chains are too tight? :dunno_white:
to get the camshaft back on, i took out the pretensioner and placed the camshafts in, then reinstalled the pretensioner. Will that make it t oo tight?
How do I get the chain and the cams back into sync? :icon_confused:
please help.
DON'T ATTEMPT TO TURN THE ENGINE ANYMORE!
You might damage the valves if you do. Gone to find the necessary info.
Take off the valve cover and the cam chain tensioner. Make sure all valves are closed (no bucket depressed). Disengage the cam chain.
Take off the ignition timing cover to the right of the crankshaft.
Remove spark plugs (motor turns much easier with closed valves that way. Plus you are dead sure not to trigger an unsolicited ignition that way.)
Turn the crank with a 19 mm wrench and align the R-T mark with the left sensor coil. Block it in that position.
Turn the exhaust camshaft so that the "1" arrow points towards the front and directly to the top case surface.
Pull up the cam chain in the front and be sure to take out any slack; engage it in the exhaust camshaft sprocket.
The number "2" arrow on the exhaust camshaft sprocket points directy to a pin of the cam chain. Begin counting from this pin (it is No. 1); count 18 pins.
Pin 18 is to be engaged in the sprocket gap that is marked with arrow mark "3" on the intake camshaft.
Wind the spring of the cam chain tensioner and install it.
You should be fine now.
(Unless you already bent the valves before)
Slowly rotate the engine with an 19 mm wrench (or from the rear wheel in a high gear); nothing should bind. If that tests positive, reinstall covers and spark plugs and try to fire her up.
Quote
Quote from: MarkusN on September 25, 2006, 04:39:12 AM
DONT ATTEMPT TO TURN THE ENGINE ANYMORE!
You might damage the valves if you do. Gone to find the necessary info.
man that just scares me to do anymore to my engine sigh.. i wish i wasnt so dumb sometimes hopefully ill be able to get it running agian. after that I aint going to touch a thing. thanks for the help
Quote from: domahmegok on September 25, 2006, 05:13:23 AM
Quote
Quote from: MarkusN on September 25, 2006, 04:39:12 AM
DONT ATTEMPT TO TURN THE ENGINE ANYMORE!
You might damage the valves if you do. Gone to find the necessary info.
man that just scares me to do anymore to my engine sigh.. i wish i wasnt so dumb sometimes hopefully ill be able to get it running agian. after that I aint going to touch a thing. thanks for the help
How about getting the necessary info (read: a maintenance manual) beforehand next time? You'll learn way more that way, and you'll have fun (if you are so inclined, that is) and save money into the bargain.
Quote from: MarkusN on September 25, 2006, 05:15:52 AM
Quote from: domahmegok on September 25, 2006, 05:13:23 AM
Quote
Quote from: MarkusN on September 25, 2006, 04:39:12 AM
DONT ATTEMPT TO TURN THE ENGINE ANYMORE!
You might damage the valves if you do. Gone to find the necessary info.
man that just scares me to do anymore to my engine sigh.. i wish i wasnt so dumb sometimes hopefully ill be able to get it running agian. after that I aint going to touch a thing. thanks for the help
How about getting the necessary info (read: a maintenance manual) beforehand next time? You'll learn way more that way, and you'll have fun (if you are so inclined, that is) and save money into the bargain.
hey we all had to start somewhere, and sometimes noobs do make mistakes, dont take it out on me just because I did something stupid. :cookoo: It also makes it harder for me since I dont have a computer at home, so I can't really look up something if I run into a problem.
But anyways I followed the steps that you said, and put together everything. Except when I turned the engine by hand, it seems to make a thump sound. I'm guessing one of teh valves is bent? I checked the sparked plugs with my finger; it seemed alright to me. Any ideas? :dunno_white:
Did you have the plugs in the engine while you turned it over? It can make a "thud" from the compression. Try turning it without the plugs. There will be some resistance from the cams pressing the valves but it won't be much. If it still makes a thud or dosen't want or turn, then your valves might be hitting the pistons. :cry:
Don't force it if it there is more than a little resistance. Go back and make sure you set the cam timing right. If there is a visible gap between the cam and a valve shim, the valve is bent and not closing all the way. Not good.
Try this and get back to us, we'll go from there.
Now go have a beer and try this tomorrow :cheers:
Quote from: ducati_nolan on September 27, 2006, 10:52:02 PM
Did you have the plugs in the engine while you turned it over? It can make a "thud" from the compression. Try turning it without the plugs. There will be some resistance from the cams pressing the valves but it won't be much. If it still makes a thud or dosen't want or turn, then your valves might be hitting the pistons. :cry:
Don't force it if it there is more than a little resistance. Go back and make sure you set the cam timing right. If there is a visible gap between the cam and a valve shim, the valve is bent and not closing all the way. Not good.
Try this and get back to us, we'll go from there.
Now go have a beer and try this tomorrow :cheers:
I should have clarified, the sound it makes is a hollow sounding thump, and I did remove the spark plugs to check. same noise. How hard a fix is it if valves n pistons were hitting? I want to be able to fix it ASAP so i can get a few more rides in. :icon_lol: Also I am kind of new at this so good instructions would help. I tried serching bent valves but didnt really find what I needed. PLEASE HELP I been thinking about my bike all day now, and its hurtin me.
Quote from: domahmegok on September 27, 2006, 03:10:46 PMhey we all had to start somewhere, and sometimes noobs do make mistakes, dont take it out on me just because I did something stupid. :cookoo: It also makes it harder for me since I dont have a computer at home, so I can't really look up something if I run into a problem.
Sorry, didn't mean to come over as aggressive. Don't let yourself be discouraged was the gist of what I wanted to say. (And: know what you're doing or it might get expensive. Yeah, that too.)
If you do have a bent valve I dare say that the necessary works will be beyond what you can do yourself. You need a shitload of special tools to replace a valve, and the work involved is quite sophisticated.
Actually you could do the repair yourself: Get a used cylinder head and replace it. They can be found quite cheaply on eBay.
But first mke sure if you do have a bent valve. First check valve clearance. If that seems to be alright, I'd try to fire her up.
a bent valve usually means no compression because the valves are stuck open am I correct? so if i have compression in both cylinders, that means my valves should be ok and I should check the valve clearances than fire her up.
If I have no compression I have a bent valve and would probably need a new head right?
More or less, yeah. A bent valve does not necessarily mean that you lose so much compression that you can feel it with your finger. If you felt compression while manually cranking her, you can be pretty sure that the valves are OK, though. You definitely won't damage anything then trying to start the engine.
If valve clearances are still good, you can again be pretty sure that the valves are OK.
While you have her still open, see if you can see any irregularities in the running of the cam chain while you crank her over (just trying to find the reason for the clunk). Also, check if the followers do follow the cams, or if one gets stuck in between.