Originally Posted by
grizz1
Just out of interest, I noticed the carb on my 5 port was slightly loose the other day. It was still tight in the crankcase housing, but moved slightly sideways when the throttle was applied. I am not running a strong throttle return spring, just 2 x silicone throttle bands.
On removal of the carb I discovered the new "peanut brown" O ring in the crankcase housing was all shredded. This is a relatively new motor with approx 2 gallons through it. The carb has not been previously removed. It wasn't causing any problems, motor was running fine with good stable temps. Just thought it might be something for you guys to check on your motors.
Good post grizz, yes the carbs in the motor are not really that tight when they are new, its a good idea really to check the motor befor running it in, i don't get a chance to check all the motors mainly the modded motors i do are fully inspected simply for the reason they are broke down fully to do the work. If you buy a stock engine pull it apart just to be sure the insides are clean of any debree or small bits of alum, this should be done with any motor that is new, to ensure that the carb is tight, loosen the pinch bolt be for starting the engine and apply preasure to the top of the carb to be sure it is seated all the way down and then tighten the pinch bolt, once the oring that is on the carb neck is seated to the case it shouldn't have any movement, and with the new orings they have seated tighter than i have ever seen, which is good, the new 3 port race engines have the best carb fit to date, i would expect that is rolling over to the other race engines as swell. Hope that helps