Crankcase Set (LINE BORED FOR 2FAST 70cc CYLINDER)
Cases have been lined bored to fit the 2Fast 70cc cylinder kit.
*** SHOP SHOPS USE THE 90cc CASES FOR THE 2FAST 70 CYLINDER, BUT READ POTENTIAL ISSUES BELOW ****
- The 90cc cases don't provide much mating surface for the cylinder to get a good seal, so other shops will sand which in silicone to seal this area
- To fix this issue (if yours was built with 90cc cases) we would weld material to the cylinder to provide a larger mating surface so you can use a fiber gasket and have a dependable and field serviceable seal
- The 90cc cases have less material so the crankcase pressure is reduced, which is the opposite mindset of why people use full circle cranks, which is to increase crankcase pressure for greater performance
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