hi i have a gilera dna 50cc i have gone through two water pumps since i rebuilt it. here are the specs: doppler s7r 70cc kit top racing crank stage 6 bearings and seals stage 6 replica pro exhaust standard box with polini air filter stage 6 clutch bell with standard clutch 7gr and 3.5gr rollers with standard variator lighten front pulley unlimited cdi ngk ht lead and cap 17.5 carb with 80 jet could anyone help me why it keep doing it and how i can stop it from breaking cheers
Simply because your water pump is constantly having to strain itself to keep the engine cool. The only way you will prevent this from happening is getting rid of your upgrades
install a electric water pump and remove the standard mechanical one as it will be no use with your set up
The std water pump will work fine with your engine set up, you must be doing something wrong for it to keep failing, remember you don't need to strip engine to replace water pump/ seal!
