BBR Tuning 2-Stroke 66/80cc Bullet Train Electric Start Bicycle Engine Kit With the BBR Tuning 2-Stroke 66/80cc Bullet Train Electric Start Engine Kit you’ll be taking your motorized bike build to the next level. This multi-purpose gasoline engine kit has an automatic centrifuge clutch. There are two different starting methods, pull-start or electric start, allowing great flexibility in operation. This new, well-designed electric engine kit offers several improvements over previous models. Enjoy the benefits of more horsepower, easier operation and a lower technical dysfunction rate compared to other 2-stroke and 4-stroke engine kits out there. If you're an experienced rider ready to take your hobby to the next level with a faster engine, look no further than the BBR Tuning 2-Stroke 66/80cc Bullet Train Electric Start Engine Kit. This engine kit gives you the power and performance you need with the latest upgrades such as high-quality Japanese clutch components and crank bearings. It's specifically designed for speed so it's the ideal upgrade for serious enthusiasts ready to take the next step in terms of performance. Every single electric engine kit is manufactured to the highest quality standards so our customers get the best possible products. But beginners and pro riders alike can enjoy the security and peace of mind that comes with a 6 month warranty on your new engine kit. This electric start engine fits most bicycle styles such as mountain, road and cruiser that have a V frame shape and 26-inch wheels. For ideal installation conditions, there should be 9 inches to 11 inches of clearance between the top bar and bottom bracket. The frame tube should have a diameter of about 1 inch (25 to 29 millimeters).