Delivering the Volts and Sparks - Wiring Looms.

What a bloody mess!
The problem with buying non-running, old junkers is you never know quite how bad something is until you rip it apart. When you buy them unseen, it's worse.

I must admit, the wiring loom left a little to be desired when I removed it. In fairness it looked as rough as fu... I'd seen anywhere. 

• Insulation tape covering a myriad of twiddle joints (hate those). 
• Wires chopped off and left exposed (woohoo).
• Multi-plugs missing and a different set of clocks wired in (aargh!).

But nevertheless, I labelled various wires that went to the regulator/rectifier, coils etc. just in case I needed it for future reference. I'd already worked out we had no functioning charging system, oil light, gear indicator or fuel gauge when I'd fired it up previously, so repairs were definitely necessary. (The gauge was actually connected up to a brake light switch circuit if I remember rightly.)

So, yesterday I decided to pull some stuff out of boxes to see what else was hidden away. There was the loom covered in dust, mud, road grime and black paint. Out it came and straight into the sink with a dose of washing up liquid, Jif, scourers and a brush. After a bit of scrubbing I could actually tell the colour of the remaining multi-plugs, the wiring colours and, as I pulled away the torn insulation tape, I came across more cut wires. Oh joy.

With it dried out in the sun, I pulled it back inside to further inspect. It's no problem to tidy up the wiring with solder joints and heat shrink (although you do need to be careful when soldering because the vibration on a bike can crack them) but, because I'll be moving the position of some of the electrical units, I'll need to wait until the bodywork is complete. 

Happy New Year!

2014 is upon us. 
Resolutions? Hmm, never bothered before, but it's 5.00am as I start this on 01/01/2014 and maybe, just maybe, I feel the need for a new start. So, without further ado, and a good cup of Tetley.

What did you achieve in 2013?
For me, apart from the boring old crap, I did get a bit done on the GSX, did another track day, at long last, and started a new job doing something completely different after years of fixing things, and handing out jobs to other techs. Everything's good, I'm surrounded by great mates (here and overseas), and have an amazing family (here and overseas), and incredible kids who love to help out in the garage when they're allowed. Does it get any better?

What about the resolutions? 
Couldn't really come up with much. Don't have enough interest in it I guess, but here goes:

1) Somehow, whatever way possible, try to get more Suzukis into the garage (I will, however, settle for a lesser machine - two wheels is its ticket in).
2) Get the GSX750 finished - ok, not finished, but usable.
3) Buy less beer, buy more parts.
4) Talk to my wife more - some would say I talk too much (but that was me).
5) Learn to walk a tightrope, play an instrument and juggle - useful skills I can no longer manage without.
6) Become a banker.
7) Stop quoting Seinfeld all the time (see number six).

I've hit a blank, no imagination so that's all - seven resolutions - isn't that lucky? Lucky for you at least.

Enjoy folks, some of you have yet to sample 2014 at this point so have a great time getting there. As for me, it's a beautifully sunny day and I'm off down into the garage while everyone's asleep...

Brake Judder Problems On Your Bike?

What is it?
If you're getting a bad vibration every time you apply the brakes, there's a good chance you've got a warped disc. But before you order [expensive] new ones, carry out some basic checks first. 

1. Lift the front end of your bike and turn the steering from lock-to-lock slowly, feeling for any roughness or looseness in the steering head bearings. Any play, or harsh movement, and it's time for new bearings. Get that sorted first.
2. Are the brakes binding at all? Spin the wheel. You'll hear the pads rubbing the disc, but it should spin freely, not stop as soon as you let go of the wheel. If they're binding, you need to free up the pistons or overhaul the calipers. Binding brakes run hot and can lead to warped discs.
3. Is there any play in the fork stanchions/sliders? There is always a minute amount of play to allow for easy movement but, if excessive, could cause a juddering through the handlebars. In fairness, this isn't so common and points one and two should be checked out first.

The visual.

It's not always necessary to use a dial test indicator to check for runout. Sometimes you can see by eye how bad the disc is. Check out Bryan's CBR here.

Lakeside 14/12/2013 - Trackday with Champion's Ride Days.

Don't let 'em scare ya!
I'd heard plenty of people say that Lakeside was for the experienced track-dayer only. No run-off, combined with plenty of armco, and varying elevations meant death was inevitable for all but the very best... hmm, gotta be worth a dabble.


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The Magnificent Seven.
Seven booked, and seven came away... alive (amazing). A variety of experience and machinery between us, we booked up with Champion's Ride Days to pit the wits, and see who'd come out top.

6Sigma Racing - Rejet Kits.

Pod filters and open (ish) pipes.
It all leads to one thing, lean fuelling. It was all Dynojet kits when I was growing up. New pipes, or just a slip-on can? Needs up-jetting. And, although expensive when compared to buying a few jets, you knew your bike was going to run pretty well for the setup you had.
They did the testing for you to save you constantly removing a bank of carbs, swapping jets and then road testing it. That was enough of a selling point, and well worth the money, for most people.

Back to the point.
A little bit of searching online and I found 6Sigma racing jet kits for sale on eBay. Reasonable money, good feedback and they seemed to have a fair idea on what they were doing. Gotta be worth a shot so I put in a best offer, they accepted and the rest, as they say, is history.

eBay Search Hits The Spot Again!

Search: 11351-31300

Bought a project? Do yourself a favour and make a list of the items you'll definitely need to finish it off. Go to an online parts website and use their microfiche facility to work out the exact part numbers you need and, finally, save your search on eBay.

As the months go by, it's surprising what pops up for sale. I've now picked up a new stator cover for the GSX. That's both front crankcase covers sorted now which is going to finish the engine off nicely.

A big thanks to mcpartssales for packing and sending it so quickly. Great service and proof that those hard to find bits are still hidden away in shops everywhere. If you're looking for anything for your project, give Rod a shout at his eBay store. He's been in the bike trade for over thirty years and is absolutely passionate about finding the elusive bits we all need every now and again. Thanks again mate!

Anti-Dive Fork Technology - Or Not?

Improved Suspension Means Faster Bikes!
In a time when power and performance were paramount, the superbike manufacturers of the seventies and eighties were busying themselves with update after update. The big four Japanese factories continually pushing themselves to bring out the biggest and, perhaps more importantly, fastest bikes to sell to an eager public. The fact that the frames couldn't hold most of them in a straight line didn't matter, horsepower sold bikes. Besides, when you're in the pub claiming 80BHP at the back wheel over a few pints, the fact that you encountered death regularly really didn't matter (hell, it probably added to the bragging rights). 

But as the engines continued to grow, somebody in Japan must have twigged that a bike that went in a straight line of its own accord, and round corners at the pilot's, might be a useful design brief. And it worked. Suspension improved, frames got stiffer, and gimmicky names and four-letter abbreviations began to take off!

1) Full Floater suspension - Suzuki's mono shock system.
2) TSCC - Twin Swirl Combustion Chambers (pretty cool huh?)
3) SADS - Suzuki Anti Dive System (or maybe just stick with sad)

All of the factories were at it, and all trying to outplay the other. I guess it kept them honest, and the punter was happy to benefit from the very latest in sports bike technology. And some of it was good; gear selection indicators must have been light years ahead at the time, and I'm glad to see Suzuki still using them (I wouldn't be without it now). But for every good idea, there came the oddities.

Consider, if you will, a device to prevent the forks from diving when applying the brakes. Imagine, suspension unflustered, steering geometry remaining a constant when cornering, what could possibly go wrong? Hmm, what about bumps in the road? 
Unless a [relief] valve was incorporated in the forks, you were now riding with a rigid front end - until you released the brakes. Upon which the suspension would suddenly start moving again, affecting the entire bike's poise. Not really that good when you're committed to a bend. But, SADS does have such a valve incorporated, so maybe all is not lost.
The next aspect to think about is brake lever travel. Single piston, floating calipers have one major drawback. Once the piston has moved its brake pad into contact with one side of the disc, the caliper itself must slide to enable the other brake pad to do the same. Although the movement should only be slight, it does increase lever travel. Factor in the anti-dive mechanism and it's going to be hard to get good feel from the lever. Maybe a late Gixer master cylinder will help...

Anyway, without further ado, we have the anti-dive modulators themselves. Here's how it's ripped apart, cleaned up and put back together.