They don't make it easy... Whenever a vehicle is designed, it's very important for the manufacturer to use odd sized O-rings. Forget rounded-up to the next millimetre sizes, you are guaranteed that the vital one needed will be 3.67mm in diameter and 0.89mm thick. Should you, by good luck, find an identical size, it'll probably be of the wrong material. And don't even get me started on the old "universal" box of O-rings you can buy! These were a great money spinner for someone, but they won't actually fit anything, and you'll be left with a full box thirty years later. So when it's time to rebuild the carbs on your GS/GSX, it's nice to know that someone has already done the hard work, and research, for you and can supply the complete set for a great price. Without the right ones, your bike will never run properly. Robert Barr's website http://www.cycleorings.comnot only has the right parts, but also comes with tips to help you do the job. I'd already bought some of the O-rings for the GSX carbs, but the ones niggling me were the tiny ones for the mixture screws. I struggled to find the right size, so decided to buy the complete kit for US$16 delivered. Awesome service!
So there's been some whinging... Not sure if it's different for the female fraternity, but when a geezer says there's a problem with his bike, it's immediately classed as an excuse. Always has, always will be... and hell, I'll admit it, I've used it a fair bit too. And so it was with Dave's Superduke. Ages ago he said it didn't feel right, "It's like the front tyre is sticking to the road at really slow speeds." I thought no more of it, after all, it only ever goes at really slow speeds. Boom boom! I had a ride on it back then, but hey it's a Harley, sorry V-twin, and didn't really feel out of the way. But a few months later, yes just last weekend, we went out for a blast and he pulled over and asked me to ride it again... I got thirty yards and thought 'What the f*#k!' This thing has become very dangerous. Slow speeds, or under engine braking, and the steering went horribly tight. With throttle whacked open it was good, but as soon as you caught up with a car and slowed down, it felt like the steering was about to lock up. Kudos to Davy for riding it like he was. Symptoms? When steering bearings wear, they become loose and pitted/notchy. Because of the weight of you and the bike on the lower steering bearing, once facing straight ahead, the steering effectively locks into that position. Think of it like the spring-loaded ball in a ratchet and how it pops out when you fit a socket on to the drive. That's what happens to the bearing rollers, or balls, as they drop into little dents in the outer race. From the rider's perspective, he/she now needs more leverage to move the handlebars from the straight ahead position. That's easy enough, but you find yourself having to put more input into the bars initially; then, as the bearings move out of the recess they were stuck in, the steering suddenly goes light and you're pushing the bars far further than you wanted. We're very adept at adapting (ooh, hark at him!) to these situations, but having to constantly counteract for these situations is a pain, and also dangerous. If in doubt, get someone to pull the bike over onto its back wheel and side stand, and go from lock-to-lock using the fork legs. You should feel the tight spots as you go back and fore. Still not convinced? Or inexperienced? Then get help from some who knows. Steering is pretty important on our two-wheeled bundles of joy, so make sure it's right. And back to it. So, a complete bearing/seal kit was purchased from Action KTM, in Nerang, for the very low price (I thought) of $89. That's pretty good considering they're SKF bearings, and today we set into it.
Doing It The Old Fashioned Way. Because my brand new, fitted two years ago, gasket broke when removing the clutch cover, I needed a new one. No longer available from Suzuki, you can find quite a few New-Old-Stock ones for sale on eBay - for the price of an aftermarket gasket set! Seriously, are they gold impregnated? Being careful with my funds, I shot down to Repco for a sheet of the old oil resistant stuff. Just under twenty bucks, plus a further 30% discount that weekend for being an RACQ member, and I was the proud owner of a roll of Flexoid gasket paper. Made in England! That's refreshing, should be good then.
Copying the original gasket, and with a little help from Stanley's knife, and Snap-On's hole punch set, I soon had something that resembled the first one. Even the bloody holes lined up!
With all that done, I had to hear it running again. It's been a while, and I want to be able to run a flush through the engine. So loom was laid on the bike and bits connected where they should be. This loom is a mess! I need to have a big clean up and remove the rubbish repairs from previous bodges. With battery connected, I checked for spark - all good. I filled the syringe with fuel until the float bowls were all full and gave it a whirl on the starter. The odd firing occurred and then she was away!
An O-ring makes. I should be writing lyrics, not playing with bikes. Oh well. The various seals I ordered all turned up quick smart from Blue City Motorcycles, in South Australia, with free postage too! Cheers guys. I also found their prices to be cheaper than most so happy with that. I'd left the oil pump in a container of oil all week, pumping it every now and again to make sure there were no nasties inside. It looks perfect. With new O-ring held in place with some grease, it was ready to be refitted.
Three M6 bolts hold it in place, then a thrust washer is fitted before the drive pin is inserted and then the gear can be pushed onto the shaft. Finally, a circlip holds it in place.
But it does pour a lot! The Easter break gave me a chance to not only procrastinate some more, but actually get a bit done on the GSX. I decided to fill the front brake lines with a beautiful blue DOT3 fluid, just so I could check for leaks and feel at the lever. The Chinese reservoir was duly fitted, and ten seconds later developed a leak from the sight glass. Tossers! It came off pretty bloody quickly as my freshly painted headlight switch sat underneath it. So a plastic reservoir was put on loosely while I bled them. The anti-dive units haven't held fluid for years so I was expecting problems, but the only issue was a slight leak around the banjo bolts. With a bit more tension applied to the bolts, all seems good. The lever is a bit on the soft side, but should improve once the pads have bedded in. Oil be fooked! Next job was to put a new oil filter in, fill with oil and crank it on the starter to see if the oil light would go out. As previously mentioned, the wire to the oil pressure switch was 'missing' - which could spell trouble. The 'oil light' for today being my test-light mounted between the switch and the live terminal on the battery. It lit up nicely, but refused to go out once cranking. Bugger! Could the oil pump have gone dry after all the months of sitting around with no oil? Had somebody removed the wire because the engine is fuckered? Was there more to this conspiracy? Oh joy. I wasn't taking any chances, the sump was taken off to check the pick-up gauze. The sump itself was full of thick, treacle-like oil and in desperate need of a clean out. Degreaser and brake clean soon had it spotless, but it's a worry that all that was running round the engine. The oil pick-up was holding a tiny amount of carbon, but not enough to stop the oil pump sucking and pumping the brown stuff around. So, with all that cleaned up and blown out, the sump was refitted with a new gasket.
Thank F... goodness For Seven-Fifties! They were all the rage in the '90's. World Superbikes kept them firmly in the minds of any pub road-racer. I was just starting out on the road, but wanted a blue ZXR750 with those Hoover tubes looking so bloody cool coming out of the tank. Ooh yeah. And let's not forget the rare RC30... Local fast boys had GSXR750's and wheelied from the lights constantly, telling me about the gearbox rebuilds from continual wheelie abuse. It was music to my ears at that age! Yeah, there were 1100's, and the all new Fireblade, but it was the 750's that were racing round the track against 916 Ducatis. And then... Everything changed. 600's got quicker, the R1 came along and annihilated the ageing 'blade. A few years later, Suzuki had a thou too and suddenly WSBK was destined for 1000cc fours as well as the V-twins. The midrange 750's started to die out - after all, they weren't wanted in terms of sales. The ZX7R hung in there for a while, but the only true sports bike to maintain that displacement was the GSXR, all those years after it's formidable launch in '85. And what a good move by Suzuki. Yeah, thou's are great fun 'cause they're quick. But how much power can you actually make use of on the road? There was a time when a big bike was limited by its poor chassis. You might have horsepower, but you're going to die if you try to exploit it. Not so much nowadays. They let you get away with a lot, but also make you very lazy. Someone faster than you in a corner? Just open up on the straight and reel him back in. You end up riding around on quarter throttle thinking you're Troy Bayliss, while there's a 600 stuck up your chuffer trying to hurry you along in the corners! Looking at the latest thou's now, I can't help thinking that all the electronic aids designed to make them faster/safer are dulling the basic virtues of riding. Launch control, traction control, wheelie control... strewth, what about my control? Sure, gadgets are great, but go out there and get on a real bike for a bit. Give the brain something to do, you might actually enjoy it...
You can put the insulation tape away too! It maybe considered pedantic, considering the rest of the bike at the moment, but I didn't like the white, heat resistant (?) sheathing on the wiring from the signal generator. It was torn in places, fraying and looked scruffy - not really the look I was going for (for the wiring at least). So, with a little bit of looking around on the dock of the eBay, I found some Techflex. A plastic braided sleeve which expands when you push it together so that you can get it over various looms, hoses or cables etc. When it goes back to its original length, it tightens back up and looks great. Worth a shot of anyone's money I thought.
Here's the old covering looking a bit dilapidated. I'd cleaned it up as best I could, but some things have their limits.
