BK's Winter RestoMod Project - 82 XJ650 Seca

Understood.

Gary H.

 

Just curious though, are these the rings I need?:

http://www.ebay.com/itm/80-82-YAMAH...ash=item3cfdb0320a:g:42oAAOSwn51UY8MF&vxp=mtr

I can handle $46 for a set of rings I guess. Been seeing them for ~$300 elsewhere so it is a little odd. I'd have to buy a honing bit and have the jugs measured though.

I'll be down in the shop tonight for a regroup.

 

Those are for a rjc which is a canadian 650 yics engine (same as u.s. 650 maxim). Idk if the bores are the same on the non-yics and the yics tho. I'll look it up when i get home from work if another member doesn't tell you. You could ask Chacal...he'll know.

Gary H.

 

Ah. Just curious, but how can you tell its for the YICS motor?

I'm just not prepared to drop close to $400 on rings for this. BikeBandit has rings for ~$40 per cylinder so I guess that's a little better.

The same guy that help me remove the broken stud offered to do all the measuring on the cylinders as well for proper rings. He's a top notch guy.

The past 24h I've changed my mind a hundred times. I'm sleeping like shit. My attitude is garbage. I just don't know what to do. This guy raped me good and I just don't know what to do from here.

 

The listing is for a rjc. The r=seca, j='82 and c=Canada. The U.S. models are non yics.

Good news. The standard bore size is the same 63.00mm (2.4803") for all 650 models, the service limit for this is 63.10mm(2.4843"),taper limit is 0.05mm(0.0020"), ovality limit is .01mm (0.0004"), piston to bore clearance 0.030mm(0.0012") - 0.050mm(0.0020").

Have your friend check the bore before you buy rings.Hope this helps.

Gary H.

 

So if I'm reading this right, if my clearances are within spec to use standard sized rings, the ones in that eBay ad will work?

I'll have an update later on this evening. 15m left on the video upload.

 

Screw it.


I guess its going ok? I don't know. Its not terribly complicated.

Before I do forget, there is this almost brass colored shield that came off by the clutch packs. It fell out onto the bench. Not entirely sure how that fit in there. I'll take a picture when I get back down there.

I truly doubt this thing is going to run again. But, I'll follow the book and go from there. If it doesn't, well this was a stupid mistake; chalk it up with the others ones.

To be continued...

 

i think a 750 motor goes in there without too much grief. keep your eye out they're out there. putz around with the rest of the 650 and get it looking good. when you find a motor, you're good to go
split those 650 cases and see what you have, part out what's good, keep anything common to a 650/750 motor
meanwhile '05 to '08 V twins seem like they're everywhere, you've got time.

 

you want a hand impact driver with a torx bit to get those out, or a drill. they are peened so you have to drill that peen out or beat the hell out of it works too.
quit that blasting anything. just wipe them off with brake cleaner, you're not making a F1 engine
come to think of it, what makes you think you need rings?
think Briggs & Stratton

 

I think there is damage to the #2 rings.

Gary H.

 

Perfect opportunity to make it a triple

Before anyone says anything; yes you can. There is a group of racers who have been modifying Honda 650cc engines to be triples so they can run in a 500cc class.

 

Eh. I have like, five months until riding season. I have the machine. It does an awesome job cleaning stuff up. I'm this deep into it, might as well do it professionally.

Sort of. Since I'm getting a set of set of used jugs, I was under the impression that I'd have to hone it out along with new rings so the rings can "set' inside the new cylinder?

As far as the TORX, I have a 3/8" and a 1/2" impact gun. I did notice they're peened in there. Is there a special protocol for putting them back in?

 

Post deleted.

 

@k-moe: I thought you were joking but that sounds interesting. I think we should help bk get this sorted so hopefully he can stop feeling the way he does about it.

Gary H.

 

A drill bit and impact to get them out. A torque wrench and a punch to put them back. I installed new ones.

Gary H.

 

I also installed new bearing retainer bolts. I double up; blue loctite, and peened the edge.

You will have to set the end-gap of the new rings, and do a light hone if the factory cross-hatch is gone. I just use a ball hine to break the glaze and get a new cross-hatch (assuming the cylinder walls measure in-spec.

And I'm dead-on serious about the triple. It would be down on power from stock, but it would still run great. Maybe I'll tackle that project one day if I find a suitable engine for cheap enough.

 

Your first line had me all confused. haha

mmk. I forget how they looked, but are the bolts themselves peened or this there a washer behind it that is peened? And I'm guessing Chacal sells replacement bolts?

I'll do locktite for sure.

Bearing retainer bolts. Which ones are you referring to?

The jugs I ordered will get a honing.

 

Very important to bag and tag during the tear down. As long as you keep up with everything we'll help you put it back together.

The heads of the bolts are peened. Yes, Chacal has these and the bearing housing bolts. The timing plate assembly will get removed. The procedure will not disturb the pointer. You'll need that impact gun tho.

Gary H.

 

The peened fasteners are for the middle-gear bearing retainer.

 

a air or electric gun isn't the same as one you hit with a hammer, you'll see