Steve’s OSSA is Famous!

May 10, 2012 in Cafe Culture, Other Builds

My father-in-law Steve has his bike featured this week on the Café Racer TV website as the bike of the week. It’s the bike of the week for Week 4 Season 3 in case you want to check this out another week. Apparently, they don’t have direct links for each bike.

The bike is Steve’s own creation of an OSSA Sport GT based on a ’72 Stiletto Motocross bike. The engine is a 350cc and built by Ossa Engineering – which incidentally is Steve himself and the garage you see behind the bike. There are more details on his site, so I won’t rehash all the technical details, but it’s worth reading.

I didn’t know a lick about OSSA before meeting my wife. In fact, I had just started riding motorcycles a few years before and had just started to learn about café racers. I remember the first time I went to my in-law’s house, this bike, or rather another incarnation of it, was sitting in front of the garage in a very raw form. Bare steel and aluminum – very tough.  I’ve joked with my wife and her Dad that this bike could have been her dowry for marriage.  I don’t think he thought that joke was very funny…

Over the years I learned a little more about OSSA. Now the legend of these primarily dirt tracked bikes are kept alive by Steve and some of the Spanish motorcycle heroes of yesterday. Steve engineers and fabricates parts for people all over the country and, obviously, finds time to a build a few himself. He’s won some awards and been around the country show casing these old bikes at places like Mid-Ohio.

Last summer, he got back together with a group of old friends in New York to celebrate John Taylor, Dick Mann, and the Yankee Motorcycle. The Yankee is pretty much an American frame with a two-stroke motor from OSSA. Steve built these bikes back in New York and so this was a reunion of sorts.

My hats off to you Steve! You certainly deserve some recognition for all your hard work!

Third Time’s the Charm

May 3, 2012 in CX500

So this last week I have been working on a few details. My choke cable wouldn’t stay open when pulled, so I’ve replaced that. I also found a hairline crack in the boot between the right-hand side carburetor and the engine. I don’t think it had gone completely through and I don’t think it had affected the fuel mixture yet, but I repaired this with some superglue to prevent any future issues.

But my biggest project has been to repair the paint…for the third time. I don’t have the facility to do paint, so it’s pretty frustrating to keep working on this. The reason I had to go back and repaint again was that in my haste to get the bike out on the road a few weeks ago, the fenders were not well protected and got scratched. I also noticed a couple spots on the tank where the paint had started to chip…already.

Rattle can paint is shit. It really is and they shouldn’t even sell this crap in stores. If you’re painting something that will never get touched and doesn’t have to look good at all, sure this crap will work. But if you even remotely care what it looks like when dry, you shouldn’t use it. But I’m not willing to pay $1000 for a pro paint job, so I’m again using my Preval sprayer and with my auto paint and I found a better solution for the clear. I’m using a polyurethane paint called SprayMax 2K. This is a 2-part clear coat in a regular spray can that is “supposed” to go on a lot more like professional clear coat. This seemed to work OK, but I’ve already seen some spots that didn’t come out as well as I wanted. I guess I’ll have to wait until everything is cured to sand it out and see how it looks smooth and polished.

Reassembled and Tested

April 24, 2012 in CX500

So I made some real progress on the carbs.  Thanks to Larry Cargill, a guru of carb maintenance in the CX 500 community, I got a new right-side carburetor body last week.  He also sent me some new mix screws and rubber O-rings for some parts I needed.  The guy is really an excellent resource and authored a book I’ve been using to dissect and resurrect the carbs I have.

After cleaning and re-assembling the carbs, I put them back in the bike only to find that my bike was still running very lean and took a lot of effort to start.  This was really discouraging, but after taking them off the bike (again!!!), I found the culprit.  One of the slide needles I had shimmed and filled down in an effort to smooth out expected flat spots in the acceleration, had been damaged and fell apart.  The needle no longer lifted and was stuck.

For now I’ve JB welded this back together, but have some new 53F needles on the way.

I also balanced the carbs using a homemade manometer.  The idea is you want to have equal vacuum pressure on both sides of the carburetor so they equally share the air, gas, and generally work at the same rate.  I picked up some adapters for the vacuum ports on the heads, some rubber tubing, and a yard stick.  Making sure both sides were equal length, I put some 85W oil in the tube.  When connected to the bike, I then adjusted the carbs so that they pulled equally on the fluid in the tube.  What I found was this was extremely temperamental and there was very little room for error, but I think I got them pretty well balanced.

I’m not 100% done with the carbs since I haven’t had a chance to ride the bike  and test things out in a real world scenario, but at least they have all working parts and they are as good as I can get them in my garage.

One Step Forward, Two Back

April 16, 2012 in CX500

This weekend was one of success and then relative failure with the bike.

First off, I got the bike started. This is a huge step in finishing the project, but certainly not the end of the road. I write code all day and this morning I couldn’t help thinking how building this bike is analogous to designing a program. You might write a program for days or weeks, but while you’re working on each individual part, you’re really just making a guess about how everything will work together. Then one day, you’re able to compile your program and it runs for the first time. This doesn’t mean the software is done – it’s just time to begin testing. Sometimes things work as you want and other times you have to rebuild certain pieces to get them to work as a whole.That’s what this weekend was for me.

As soon as the bike started it, I began to see problems. It didn’t turn off with the key, but it would with the kill switch. The bike didn’t idle great and ran weak on one side and really got on the other. It wouldn’t rev beyond 4 or 5K RPM. There were some fitment issues with the rear fender and seat. And on. And on.

But most of me didn’t care. As soon as I could put the bike in gear, I rolled it out of the garage and took it for a spin around the neighborhood. It’s pretty loud and attracted plenty of attention – most of it deserved. It’s pretty awesome. But quickly I could tell there were more issues and I might have jumped the gun on my test ride. The left side was running very lean and the pipe wrap was getting hot so fast smoke started to pour off. Also I didn’t tighten down the battery box very well and it was starting to come loose. I got her home and she now has her first 2 miles.

The issue with it not shutting down the with switch was an issue of dirty contacts in the ignition. Check.

The issue with the idle and it not running right was another issue. I thought it might have to do with the fact the carbs weren’t balanced, so I began buying the parts necessary to build a manometer. But while I was looking into that, I also examined the mixture screws again. While rebuilding the carbs I noticed that the right side was missing a mixture screw, but I thought this was by design. Sunday, I realized it had broken off so cleanly prior to my carb rework that I didn’t notice it was in bad shape.

I pulled the carbs (for like the 10th time in a week) and decided to use a screw extractor to get the old, broken needle out. It was very, very resistant and when it finally came out, it took the aluminum body of the carb body as a hostage. I immediately began to laugh at how ridiculous all these carb issues are. I have spent probably 50 bucks on random parts for these things, had other owners give me parts, and spent probably a dozen hours on different aspects of the rebuild, only to have it break catastrophically in the end.

I don’t know what my next step is. I’m looking for another owner that can give me a clean right side body or maybe an entire set of clean carbs. I’d rather not spend a whole lot of time cleaning another set, but I’m at the mercy of what the market bears right now.

It Lives!

April 14, 2012 in CX500

Well, the bike runs!

Mostly.

I got all the essential parts back on the bike and started it up.  Sounds pretty good – idles close to 1K RMP.  Throttle response is good.  Seems that one pipe is running a little hotter than the other, but…  Did I mention it runs?

Still needs some tuning, fenders, wiring for the rear lights, and I need to work out some glitches.  For one, the bike seems to run even after you turn the key off, but hey, major milestone getting it to turn over!

You CAN Polish a Turd

April 7, 2012 in CX500

As it turns out, you can polish turds! It has been a long journey to get to this stage, but I’m happy with the way the tank and fenders turned out. You can see here in my second paining job that the paint is pretty rough:

With a lot of elbow grease, 3 grits of very fine sandpaper, rubbing compound, polishing compound, and some Meguiars Scratch X 2.0 (highly recommended by the way), I got this:

My litmus test was whether I could clearly see my ugly mug in the paint. If so, I was happy. Here you can see my ugly face (actually mostly the camera) and also my ugly lawn:

Carburetor Surgery

April 4, 2012 in CX500

I haven’t added much in the last week or so because it’s been crazy busy. Had some family in town, my roof is getting re-done, and there are some other things I’ve had to do around the house. I ended up getting the front brakes bled last week and doing a re-re-paint of the tank. My first repaint worked alright, but I ended up sanding too far through the clear trying to get out a couple imperfections, so I had to fix that. They say the third times the charm…

This week’s project is re-doing the carbs. I mentioned before that Murray sent me some used parts. Monday night I had a chance to get carbs split apart, springs unhooked, and took out the shaft connected to the butterflies in an effort to replace the hangar. I was initially nervous about getting this far into the carbs, but I bought a book from Larry Cargill that explains the inner workings pretty well. Tonight I hope to have some time to reinstall the parts I removed.

I’ll also spend some timing cleaning them thoroughly. I had done what I thought was a good job with carburetor cleaner, hot water, and an air compressor, but after reading Larry’s book I think I could do better. I bought an ultrasonic cleaner from Harbor Freight which I’m hoping can get into all the spots I can’t. I used this tool a little Monday night and was really impressed how well water shaking at high velocities can clean something. I think I’ll end up finding a ton of uses for this – anywhere from the garage to jewelry.

Broken Carb

March 23, 2012 in CX500

It seems the closer I get to finishing the bike, the more issues I run into. This is about how I feel right now:

Photo by Kristina Fender

I got my new push and pull cables this week and was putting the carbs back on when I noticed the pull hangar/bracket was a little loose. Upon closer inspection, it looks like someone tried to fabricate the left side of the bracket and spot weld it. The weld is not holding now, so I attempted to repair it with JB Weld. The morning after the JB weld was holding, but I could wiggle the repair like a loose tooth.

Part of me wanted to put the carbs back on the bike to save the time and hassle of dealing with it, but I kept hearing the mantra of “If you don’t have time to do it right, when will you have time to do it over?”.

I posed the problem on the CX500 blog and a nice guy named Murray offered to send me a replacement for the broken part and also an unusable carb body to use as a reference while I’m putting it back together for just the cost of shipping. This guy has a bunch of CX and GL motorcycles and basically talked me through the repair over the phone (although it was over my head without a reference to consider at the time). Good guy. I also bought a carb manual from this guy named Larry. He’s respected as a Keihin carb guru and I’m hoping this book fills in the gaps in my understanding.

While I wait for the mail, I still have some wiring and body finishing to work on.

Slowly But Surely

March 19, 2012 in CX500

I have been working on a lot of little projects, but haven’t gotten anything really big complete. Most things are dependent on something else that isn’t 100%.

For instance last week, I got the exhaust hung, but I’m not 100% on that yet because I still need to make sure the back of the exhaust is secure. The new super cool muffler Steve and Carla got me for X-mas doesn’t have a hangar bracket because it’s a slip on and doesn’t weigh a lot. I still want to support the last section of pipe though. Still working on that…

I hooked up the battery to check my wiring and there are several issues. One, the normal headlight works, but not the brights. I think this is just a problem with the switch mount in the handlebars. Two, the taillight works, but not the battery. I had to eliminate the rear brake switch. I’m pretty sure this being omitted is part of the problem. Third, when one turn signal is used, both blink. This is kind of a success and a failure at the same time. The success part means, the solid state relay I got to run my new LED lights work and the lights actually blink rather than staying on all the time. Obvious fail with left and right blinking simultaneously. I think this is becayse both the left and right signal now run into a single indicator light in the speedo. I’ve read that I can put a diode in-line and that will prevent the current from the left signal running into the right and vise-versa. Still not sure on the specifics of the ohms and so forth. Need to research more.

I also spent about half my Saturday dicking around with the throttle cables and the carbs. I got everything hooked up, but the throttle motion was very jerky. I’ve done my due diligence with a can of cable lube over the last week or so, but the cable is bend and slightly frayed near the grip and kept getting bound up in the mechanism even when taught. Ended up just buying a new set of send and return cables online. Hope to have them sometime this week to install.

And lastly, I finally got over my anger about the tank and fender paint and took matters into my own hands. I went to a professional paint shop and they were able to color match the paint by using some space age sensor. They mixed up a new pint of auto paint mixed with metal flake and gave me an aerosol can attached to a glass bottle to spray the paint. It’s not as good as an airbrush, but better than a rattle ran you would buy from a hardware store. And they also gave me some better quality clear coat. So I spent another half-day this weekend repainting the tins. It came out good and covered all the imperfections from the ass wipes that painted this before, but the paint is a little rough. I’ll have to go over the clear with some very fine sandpaper and polish once the clear has a few days to set up.

Jet Sizes for Elevation

March 13, 2012 in Uncategorized

The recommended jet sizes for running pods and 2-1 Mac exhaust for the CX500 is 90/120, but I’ve been going back and forth about whether I should go down a couple jet sizes for CO.  I found this today on the Jets R Us site and figured I would post this in case anyone else had this same dilemma.  Thankfully, I second guessed myself when I bought the jets and ordered an extra 85.  I’m all set.