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The Suzuki GT500
The ongoing story of the mighty two stroke
In December 2017 the idea that I would like another two stroke resurfaced. I considered a Yamaha 350 YPVS but I suspected that the chances of finding a good one for anything like reasonable money were slim. Having had a GT500 (sold in 1988 to buy a Honda CB450 K0) I thought I might look for another. The classifieds showed a few though they were all really quite expensive so I thought I’d go down the buy one and sort it out route. Ebay revealed one fairly locally in an auction for about £700.00 with a day or so to run so I placed a bid. Having won it for rather more than £700.00 I hired a trailer and drove to Devon to pick it up. The owner had several bikes and was having to relinquish his container so the GT was one of the disposals. It had been bought for his father about 30 years ago and ended up with the owner, reasonably well sorted out and used for about 13 years before being stored away so it had not been used for 17 years. This length of time in a steel container does none of the brightwork any favours because of the condensation so it was in a fairly sorry state. The tank had also been full for all that time so it and the fuel tap (fortunately not the carbs) were sorely challenged.
Before it had been laid up it had been treated to a new seat, wheel rims, and tyres (these now regrettably unusable). The seat was still good and the wheel rims not bad. Stainless steel spokes as well. Come early 2018 work started. I thought I’d get the rolling chassis sorted initially. A long list of required items included rear shocks (New Hagons), fork stanchions (replated beautifully as always by AM Philpot Ltd), fork seal, (obtainable from Suzuki still) Brake hoses, caliper and master cylinder rebuild kits (after a lot of penetrating oil and peruasion they came apart), loads of carb and fuel tap bits, battery, ignition key (number on the lock thankfully), plugs, headlamp (LED from t’internet as the old one was rusty and anyway they were hopeless when they were new), indicators, brake shoes, clutch, brake and throttle cables, emery paper, paint and enthusiasm. A spare tank had been supplied with the bike as well as a set of oversize pistons, oil lines and several other odds. Missing were the oil pump cover and rear brake cable adjuster.
The carbs were stripped and cleaned, not bad especially once the various passages had been cleared out. Bits of another were bought from ebay to replace the float bowl I broke with a very gentle tap whilst removing it. Back onto new inlet stubs (the originals were very sad). The fuel tap had suffered from the old petrol going bad in it and took a lot of patience and a repair kit. Unfortunately the vacuum diaphragm is not available separately so the old one had to be very carefully removed to clear out the vile gunge. Eventually all reassembled with new filters and gaskets. Cables -