Originally Posted by pitpop

Temp depends how tight the engine is. If it's running well and smoke is puffing out of the pipe, any temp 280 and below is fine. 290+ is bad.. we generally run around 230 range depending on ambient temp it can get into the 250-260 range on a hot day. Colder day with an older engine, 200.. we run the 2013 pipe in Truggy with CK edition 5 port and 7.5 insert in the carb.



14.2 mm http://www.amainhobbies.com/product_...Engine-Bearing