Originally Posted by 31ccchopper
i broke my motor studs 4 times already the carberator broke off the intake, the clutch slipp and i cleaned it like 4 times already and adjusted it too.
Finally i up upgraded to 5/16 americian threads in the engine 3 times bigger. I driled out 3 holes and used a 5/16 tap and wohalli.
I used to own a motorcycle repair and racing shop in Detroit. After over 18 years
of working on customers motorcycles I came to realize that their are many
people that just cannot comprehend the principle of over-tightening bolts, nuts,
studs, allen-head screws, etc, etc.. We had to remove cylinder heads and install
spark plug thread inserts on dozens of engines to repair stripped out spark plug threads, due to over-tightening. Plus stripped out aluminum engine cases,or replace broken studs, it is mind boggling how often that occurs. Most of the bike
owners would blame the manufacturer or not admit that they were really the cause of the breakage, but I firmly believe that a cheap Harbor Freight torque wrench could be an invaluable asset to most inexperienced "mechanics". It seems like there is no understanding of the difference between tightening a lug nut on a car tire to tightening a 1/4" bolt in an aluminum case! Go figure!!