S&S Cycle is here with two different big bore kits for the Royal Enfield 650 Twins, that too with a promise that these two can be used in competitive closed-circuit events by their owners. In other words, they have already requested the buyers to keep the upgraded variant away from public roads due to change in emission standards and sound that will arrive from the engine. The brand has manufactured kits for almost every brand that has potential in their regular products. The big bore kits can take the 648cc displacement of the Royal Enfield twins up to 750cc in the first and 865cc in the second tune.
As the majority of the products by S&S Cycle are based on Harley-Davidson motorcycles, one can expect that the quality of components used on par with the industry standards. The stock 648cc engine can be converted to the 750cc engine for $630.95 (INR 44,100 approx) while those looking for 865cc of displacement will need to spend $634.95 (INR 44,400 approx). However, the change in engine size will result in a totally different performance quotient, which will need approval from the authorities before using the same on public roads.
The modification is limited to certain markets as the brand is not yet operational in India. Apart from the Big Bore kits, S&S Cycle also offers Power Commander ECU, 11:1 high compression piston kit, stainless steel muffler (race-spec), performance air filters, clutch kit, camshaft kit and much more. The standard output of the 648cc engine is 47 HP while one can expect almost 1.5-times the power from a well-tuned 865cc Interceptor. The brand will not offer the same sort of warranty that comes with the stock bike. In India, the Interceptor 650 costs INR 2.50 lakh while Continental GT comes for INR 2.65 lakh.