Oh No!! I've got a big problem!

[fxrer]

Great illustrative photo, Ken! (again).

How does the crud get there? And how can you “pick” it out, if the cylinder won’t move?

[andreashweiss]

$450 for motor is high. $275 is what I would charge for 81h motor no carbs,missing pickup coil assembly,24800 km on motor,chrome pretty good.turns over nicely,you pick up or pay shipping. andreashweiss@yahoo.com

[trbig]

Just keep your eyes open on Ebay. I bought an XS motor a month ago missing one side cover and the starter (But I had bought a good starter off of Ebay for $8 the week before!) for $130. I drove the 6 hours to go pick it up instead of paying the 1-200 bucks shipping. Probably didn't save much that way if you count meals and gas, but I don't shy away from any road trips! I don't know if this is a good/ great price, but nobody else bid on it, and I thought it was.
If something seems like a deal to you, or too expensive, use your judgement. If I really NEEDED that engine, 500 bucks may have seemed like a deal to me!!?? Good luck.

Tod

[prometheus578]

I had forgotten about the crud

How does the crud get there?

Looking at the front of the cylinder, you can see exposed sections of the long studs that hold the head to the cylinder and the cylinder to the case. these are open, and collect all sorts of road grime, sand, etc. Turns into a hardened mass. Penetrating oil, a dental pick and compressed air is the remedy.
Of course, once it starts to move upward, the hard-packed mass of crud is only the diameter of the thin part of the stud. You'll note that the threaded part is wider. Had one that took an hour to break free, and then two more hours just to get it past the threaded part to lift it off. Soak it, soak it, soak it.

[Ken Talbot]

Prometueus' has it right - lots of soaking and use some dental picks. Santa brought me some a couple of years back from the Lee Valley Woodworking catalog.

[petejw]

hey shawn
did u ever find out what caused
the motor to lock up,


pete

[prometheus578]

"Chain chain chain... chain of fools"

Cant' tell till you pop it open... but how 'bouts a busted or jammed up primary chain? You know... that Hy-Vo chain that runs from the middle of the crank to the starter clutch/tranny shaft. Upper engine guts seem fine, as does the tranny innards. Once you get the cylinder off, should be able to see things a lot clearer down in the bowels of the beast.

[Shawn27530]

Primary Chain

I haven't popped it open yet, but I was thinking the same thing. I have another engine coming for it, so when I remove it from the frame thats when I will split it open.

Should I put the Maxim head on the 79 engine or just leave the 79 engine B, and stick it in there. The reason I ask is wasn't the Maxim rated at a tad bit more h.p.?

[skids]

Re: "Chain chain chain... chain of fools"

Isn't the starter engaged to the crank with the HiVo? I am just talking outta my butt as I don't have the manual in front of me, but if they are connectect via the HiVo and the starter jams and alternatively, manually turning the crank also jams, I say the HiVo might be out of the question.

Originally posted by prometheus578
Cant' tell till you pop it open... but how 'bouts a busted or jammed up primary chain? You know... that Hy-Vo chain that runs from the middle of the crank to the starter clutch/tranny shaft. Upper engine guts seem fine, as does the tranny innards. Once you get the cylinder off, should be able to see things a lot clearer down in the bowels of the beast.

[prometheus578]

"Geez, he's 'cranky'"

Isn't the starter engaged to the crank with the HiVo?

You are correct. I was thinking along the lines of maybe busted hyvo.. kinked and wrapping itself around the crank, preventing full turning. Or something's laying in the bottom of the case that the crank weights are hitting. I haven't read this whole post in a while... have we taken the oil pan off and peered inside yet? Could there be a chunk of something lying on the bottom?

[trbig]

I am kind of in the same boat as you. I have a 78 or 79 motor, and I am puting a head from an XJ onto the XS motor. If you look at the valves, the maxim valves are bigger. I was told by TC that if I run my XJ head, that if I use my XS cams, I will get better performance with the bigger valves that way. Also, don't swap bearing caps if you do this. I was thinking that the caps would be matched to the cam, but they are matched to the head. I tried to use the caps for the XS cams, and they were WAY too tight. I haven't had a chance to prove or dis-prove any of this performance-wise... just sending along the same info I was given.
Also, if you do use the Maxim head, there will be 4 holes that connect to the YICS tube on the back of the head.... there won't be a YICS tube on the XS motor. You will need to seal these somehow since they lead directly into the valve port right behind the valve seat. I bought a tap for a couple bucks, and threaded these holes and put in some screws that sit flush and screw in with an allen wrench. These thread really easy being aluminum... was a snap. I did this as a non-permanent fix in case I ever wanted to use this head with the XJ motor. Good Luck!!

Tod

[pggg]

Brand new hyvo complicated chain looks it shouldn't ever wear out.

[prometheus578]

"Fugitive from a chain-gang)

Thanks for the pic, PGGG. Yeah, the chances of that going bad are remote. (I just wish he'd hurry and break that thing down... the suspense is killin' me)

[2bhappy]

Some more pure speculation. How about a broken skirt on a piston that will not allow that piston up into the cylinder?

Marc

[Shawn27530]

Re: "Fugitive from a chain-gang)

Originally posted by prometheus578
Thanks for the pic, PGGG. Yeah, the chances of that going bad are remote. (I just wish he'd hurry and break that thing down... the suspense is killin' me)

Soon "Grasshoppa" very soon LOL!

I am going to bust it down this weekend. I want to know what it is too. It shouldn't take to long. We will get the the bottom of it "Literally".