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Re: Oh man. [Re: allagainstall] #42752 01/04/09 04:47 PM
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ace Offline
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I've got a parts bike with a complete engine. I was told the engine is fine. If you want to discuss this, let me know.


D.Jones
Re: Oh man. [Re: ace] #42790 01/05/09 08:20 PM
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allagainstall Offline OP
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Sure, if you arent too attached to the head, that'd be a workable thing.. But after buying a "fine, running condition" engine that I had to rebuild the top end in, Im pretty wary of parts bike engines.. that and my funding is extremely limited, as I have said I dont wanna sink much dinero in this thing, I'd rather be saving it up for another scoot. Let me know what you might let go of the cyl head for, and how much for just the camshaft (though currently I cannot pull out the existing shaft, im pretty sure that collar melted in place)


1994 XT225
Re: Oh man. [Re: allagainstall] #42792 01/05/09 10:50 PM
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Magoo Offline
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allagainstall,
Before you purchase parts or a complete used cylinder head, be aware that without a complete engine teardown, you won't know whether or not there are metal shavings in the lower end of the engine. The shavings/filings will have fallen down into the lower end of the engine through the area that the timing chain runs in. Who can say whether or not some of them are now embedded in the crankshaft or connecting rod bearings? If you can get the parts very inexpensively, then it may be worthwhile taking your chances. If your oil filter is normally devoid of metal filings (when you change it) and the one that is currently in the bike is NOW devoid of metal filings, you may be OK to simply repair/replace the damaged parts. If you repair your engine, I would run it about 5 minutes and then change the filter and oil again. Good luck and let us know how it turned out. . . . .


Be mindful that a DOUBLING in velocity results in a QUADRUPLING of any impact force.
ALL RIDE IN/ALL RIDE OUT
Re: Oh man. [Re: Magoo] #42837 01/07/09 12:29 AM
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Very good point Magoo, thats definetly a part of my hesitance to do anything. It will have to be inexpensive whatever happens, if anything. If I can get it fixed on the cheap, it'd be worth takin chances. We shall see. At current I still cannot pull the camshaft out, no matter what. I did manage to break it free so itll turn and actuate the valves and such, but at no point does it want to pull out.


1994 XT225
Re: Oh man. [Re: allagainstall] #42839 01/07/09 01:00 AM
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allagainstall,
I have never removed my camshaft but normally one must relieve the valve spring pressure on the cam by loosening the tension on the rocker arms (un-adjust the adjustment screw) to be able to remove ANY camshaft. It should pull out without any resistance (unless the bearing surfaces are wiped out).
Good luck. . . . .


Be mindful that a DOUBLING in velocity results in a QUADRUPLING of any impact force.
ALL RIDE IN/ALL RIDE OUT
Re: Oh man. [Re: Magoo] #42854 01/07/09 01:00 PM
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allagainstall Offline OP
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Thanks Magoo!

So should simply unadjusting the valves release it enough, or should I borrow my friends valve spring compressor and pull the valves?

Just so everyone knows, im pretty much doing this just to keep my mind busy while I try to figure out how to come up with the dinero to start shopping around for a new scoot. I really dont have high hopes for this, but if it lends itself to be an inexpensive project then so be it!


1994 XT225
Re: Oh man. [Re: allagainstall] #42866 01/07/09 07:18 PM
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Magoo Offline
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allagainstall,
No need to remove valves. . . by backing off of the adjustment screw (loosen the nut first!) you take the pressure off of the rocker tip (which also removes the pressure from the heel of the rocker which is being acted upon by the camshaft). Now, with NO pressure on the camshaft, screw a bolt into the end of the cam and pull it out. If it doesn't come out with little resistance, there may be galled (ruined) camshaft bearing or journal surfaces. No ball bearings here, just bearing SURFACES.


Be mindful that a DOUBLING in velocity results in a QUADRUPLING of any impact force.
ALL RIDE IN/ALL RIDE OUT
Re: Oh man. [Re: Magoo] #42887 01/08/09 03:49 AM
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allagainstall Offline OP
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Originally Posted By: Magoo
there may be galled (ruined) camshaft bearing or journal surfaces. No ball bearings here, just bearing SURFACES.


and so in that case.....?

is it just gonna become a matter of outsmarting the shaft, like getting a real long 10mm bolt and a big washer and some sort of weight to make a custom "ruined camshaft removal hammer"?


1994 XT225
Re: Oh man. [Re: allagainstall] #42909 01/08/09 09:04 PM
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allagainstall,
Yeah. . . go ahead and knock it out using the "custom" slide hammer. Probably can't damage it anymore than it already is.


Be mindful that a DOUBLING in velocity results in a QUADRUPLING of any impact force.
ALL RIDE IN/ALL RIDE OUT
Re: Oh man. [Re: Magoo] #42919 01/08/09 11:12 PM
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I had the same issue when pulling the cam from a friends XT there must be something we missed (are missing) the cam will break, I made a puller and that quarter turn too much broke the cam shaft in two. might be worth taking it to the shop to avoid a new cam.


Whoops.. Broke that!
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