minibuck Posted January 24, 2017 Share Posted January 24, 2017 i think my derbi senda 50 r has got blow by in the piston what are the symptoms of blowbyin 5th gear is wont accelerate at all and struggles with hills in anything above second gear and takes a long time to get into the powerband Quote Link to comment Share on other sites More sharing options...
Bianco2564 Posted January 25, 2017 Share Posted January 25, 2017 Have you checked the basics?Spark plug,air filter,exhaust baffle,gearbox oil level,throttle opening fully,brakes binding,tyre pressures?what mileage has it done?you can normally look up the exhaust port at the piston skirt for signs of blowby. Quote Link to comment Share on other sites More sharing options...
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