Had a Megablade for a few weeks now and noticed a slight holding of the RPM when hot during shifting, perhaps a slight Vacuum leak. Decided to rebuild the carbs with a new seal kit and whilst I was at it clean them up with an ultrasonic cleaner. Really pleased with the results, need to order a few more O rings that go between the carbs but should hopefully solve my vacuum issue too!

Does anyone know how to disassemble the highlighted diaphragm here? I want to replace the O ring "1" which came in the kit but cannot see how it's taken apart.

All back together and unfortunately didnt fix the problem, good news is I have identified that it was an issue with the throttle cable but only that last 1mm and 1 in 10 times!

With the throttle cable off and after balancing is running great!