dachte ich auch. hier ist meine antwort von ihm. Hello Klaus, Thankyou for your enquiry. The UnderKickStart exhaust was designed specifically for the GT kits. The power delivery is smooth from 2600-8200 revs with good rev on for third and fourth. as you can see on the web page dyno printouts (www.b-racetuning.co.uk.) the power gains over the big bore clubman are very impressive. Your JL pipe is built at a compromise to fit all lambrettas from 125- TS1 225. It cant work as well for all engines. Your gearing is the same as fitted to our demo bikes so youre ok there. Noise wise, the mechanical muffler design is quieter than all thge absorbtion muffler designs and a lot quieter than the Clubmans. We also do the snail version of the UKS that you can hardly notice is fitted to the scooter. Again ground clearance was the priority and , as with the uks, youll ground out a stand/ kickstaret/ footboard before the exhaust!. Prices are £240 for bare or satin black finish and £370 for the chrome version. Pipes will be ready the end Sept/ early Oct. (Chrome extra 2-3 weeks). Please feel free to contact me regards any questions. Also, for my own marketing point of view, let me know where you heard about me/ contact details. Thanks again Klaus, and look forward to any questions/ your order. Cheers. Simon