Showing posts with label Classic motorcycle. Show all posts
Showing posts with label Classic motorcycle. Show all posts

Sunday, February 26, 2023

Yamaha FZ750 Restoration - Clip-ons (handlebars)


 I got a bent one!

So the left clip-on has taken a bruising at some stage, not to mention the rust. I initially thought it might be able to be straightened but it had flattened the tube where it was bent and would never be right however much you looked at it. Secondhand ones are few and far between, and expensive, and I didn't want to risk getting another bent one.

On closer inspection of the offending item, you can see where they are originally welded to the cast clamp. With a bit of careful drilling and jiggery-pokery, we should be able to get the old steel tube off the clamp itself. It was pretty solid but gave way in the end. 

I cut off the bad section and placed what was left in the lathe to take the outer diameter down enough to remove the threaded section that holds the bar end weights. Eureka!

All that was left to do was to go to the steel shop and pick up a length of 22mm pipe with a 2mm wall thickness. Pretty common, one would hope. Not in Australia it would seem, it's no longer available.

I then ordered some "Pipe Furniture" sections which were supposed to be 22mm O.D., but even they turned out to be 21mm. Bridgey pointed out the old handlebars on the ZXR project bike (more on that later) and it gave me an idea. A set of straight drag bars should give me the dimensions I needed. Then I remembered a load of factory-seconds bars I bought and stored a while ago. I already had the correct material in stock!

So this is how it looked. The end is pitted with rust because Yamaha didn't paint them right to the end. For obvious reasons on the throttle side, I guess, and then they just wanted them to look the same.

Monday, January 23, 2023

The Yamaha FZ750 Restoration.

Blown away...

Carlsberg don't do projects, but if they did, they'd probably be the best projects in the world. Quite frankly, if a restoration project could be ideal, this one could well be it. Admittedly, the plastics are a bit rough, but mechanically she's proving to be pretty good.

After getting the engine running, the bike was quickly stripped and put into boxes. From here I will take pics, and start on individual components. If I get a bit fed up with doing one thing for too long, I'll move on to something else to break up the monotony. It's easy to get overwhelmed when stuck on a time-consuming part.

Anyone who has pulled old machines apart would be familiar with stripped heads on screws and bolts, especially when some of the bike is as rusty as this one. But, as corroded as every fastener is, everything came apart like it was put together last week! It's been surreal.

I had noticed play in the front wheel during the strip-down and was pretty shocked to find this. 

Thursday, October 8, 2020

Suzuki GS673 Conversion — The Road Test.

 What'll it do mister?

There are no certainties in this life. All we can do is work with the best we've got, and to the best of our ability. When you work with old vehicles, you are left with a hell of a lot of choices. Replace everything for fear of something breaking down the track, or use experience to decide what will keep going, and maybe rely on a little bit of luck. It's probably fair to say we use all of these methods without a second thought.

It would be nice to change every bearing, gear, thrust washer, bolt, moving part etc., but that generally isn't viable. Instead we check, measure and work out what we can get away with. Lots of parts aren't even available anyway so sometimes we are stuck with far greater tolerances. When there is wear in vehicles, we immediately feel it when we ride or drive them but, as human beings, we automatically adjust to cope with the discrepancies. Some better than others.

Sure it's nice to be on a brand new bike, where everything is perfect, but they also leave me feeling somewhat robbed (not just with the cost of them either:). They let you get away with things, incredible brakes, plush suspension, tyres with more grip than you know what to do with. You may even think you're better than you actually are (oof, perish the thought!). 

But with old stuff you feel everything that is happening, hold the bars too hard through the bends and the weaving starts, fight it and things get worse. But relax and let it work everything out for itself and they usually settle down quite nicely. You feel that you're achieving something, that a living being is out for a blast with you, stirs the soul don't they say? (It does get tiring though...)

So ladies and gentlemen, just once, get on an old bike and be amazed at what they will do if you're just prepared to put in the effort...