Top speed problem with suzuki gn125?

i have a suzuki gn125 you need to change the spark plug and air filter trust me

luke
June 2012

you could try a new air filter

duke
August 2011

It should do nearer 70,get a workshop manual and go through all the settings one by one,points timing and valve clearance(very important)and make sure thc carb and mainjet are clean.I'm sure setting it up right will sort it if it was anything major(broken rings)it would have given up the ghost by now.Do the lot and you know it will be right.Good luck.

Rich
August 2011