Tuesday, March 8, 2011

Two steps back

Like my new headlight?
...Kidding, I bought it from a scooter store from a Sachs MadAss. It will be tucked behind a fairing on SixtyNine. It's the smallest I could find.

Didn't get a whole lot done last night, but what I did discover is worth mentioning

The thing was oil starved when it melted down. The 360 is apparently fairly infamous for this issue so I'm going to do what I can to try and alleviate it.

When they designed this motor they at one point were planning on oiling that center journal. As you can see in this picture there's a passageway cast into the head itself for this purpose:

Now I've just got to do the same thing to the good one.

Friday, March 4, 2011


I bought an SOHC 750 SuperSport quite a while ago, and I've basically been sitting on it since. Too many projects, not enough time, money, or smarts. That coupled with the fact that I've decided that what I would really like is a DOHC F has prompted me to go ahead and sell her to a friend of mine. Definitely didn't make any money on the deal but if selling it to him will get it back on the road faster it'll be worth it.

So these will be the new before pictures:


Didn't get a ton done last night, but I am moving in the right direction. The tv in the garage hinders my productivity.

Stamped to identify the proper parts.

New seals 
I like to pre-oil everything before installing  

new seals in place

Installing the valve springs. A little assembly lube on everything that has metal to metal contact isn't a bad idea, and it helps hold the little retainers in place. They're still a hell of a pain to place though. Also note back on the table that the tighter coil of the springs are at the bottom, remember this when installing them.

Old head on the right, it's interesting how much the casting has changed I don't know the build year for either but I would guess that the one on the left is newer. They're both from the same model of bike.

And this is why the old head's being replaced
 new head:

New on the left. By the way when I say new I don't actually mean new, it's off the motor for one of my other bikes and almost as old but it's "new" to Loudbike. 

Again, I've stayed up too late, and this is where I end.

The past

This is all kinds of out of order, but I have faith that you can handle it. We were going to make this whole thing into kind of a time lapse deal... but for one reason or another that never happened. So I'm going to go ahead and throw a couple of the teardown shots up as they are.

Loudbike's broken. That's why several of the last posts have dealt with the rebuilding of her head. Some friends stopped by a few Saturdays ago to help me break her down so that we could try and find what all the trouble was about, and I think we did.

 Once we had the head off the bike we could tell that the cam chain was binding up, and was visibly stretched, so it needed to be replaced. Chris just happened to have one that he had mistakenly bought off eBay so we were good to go. Only problem is that to replace the cam chain you have to completely take the motor apart... and I mean completely.


 Also this is a tappet adjuster set screw... it had come loose and was bouncing around in the bottom of the cam chain chamber. This is what had caused the binding of the chain. I'm still not sure if it was the root of my problems though.

The half way point

Back together, sort of. The head is shot which you'll see soon enough, so I had to take one off another motor and swap it in which so far has taken a couple of weeks.

Thursday, March 3, 2011

Lapping it up

This is after a real good cleaning. This head is from a motor that wasn't supposed to go on this bike, so I had been doing a bunch of cosmetic work to it which left it full of metal. Lots of carb cleaner, brake cleaner, WD40 and a full disassembly (minus the valve guides) later and I've got this:
 Not nearly 100 percent, but it's better than it was and for this bike I wasn't planning on modding the motor all out like my other bike. Also with gas at $3.29 and a full size van to drive I want this thing back on the road now.

Before and after (intake)

After cleaning each valve I lapped them all in by hand, I'll have to get one of those little suction cup sticks for the next job... but how will I hang it on the wall?! The intake seat pictured is not in good shape, you can see the pitting that could lead to loss of compression, I'll have to remember this when she's running so I can test it.

 ... and exhaust. This took a while with them chucked lightly into a cordless drill and a couple different grits of Scothbrite.

When I got done with this I was shocked to discover that it was almost midnight so I had to call it a day. With a little luck by the weekend (two days) I'll be able to test ride.

Project box is done

None of the projects themselves are actually done of course, just the big box that they go in.
(love that iPhone ISO huh? My wife broke our good camera, once we've got that back I hope to replace these pics with some nice ones)

 The little toolbox under the workbench actually stayed where it's been for a while now, but I took a bunch of plastic junk off it and hung it from the bench. I tried really hard to keep anything permanent from touching the floor.

I love me some pegboard! 

I like to have most everything on the wall so that I remember what I've got and where it goes. The tool box just kind of ended up a catchall for the stuff that wouldn't hang.