Originally Posted by grizz1

The 5 port has a very strong bottom end so 1.1 springs may be too much, depending on whether its in a buggy or truggy and track conditions.
In a buggy I would go with 1.0, truggy probably 1.1's would be ok. Like I mentioned a lot will depend on track condition and surface. Breaking springs sounds more like a set up thing.





These engines will load up with fuel and stall after a short while, that's just the way they are. Even a really well tuned engine will load up and stall eventually. Sounds like you are too rich on the bottom end. This will load up the engine sooner and it will stop as you have described. Check your idle gap with the throttle completly closed (take the restrictor out to get a better look) and make sure it is no more than .7mm wide. If it's too wide you will have to run the bottom end needle very rich to make it run and idle, hence your problem. If necessary reduce the idle gap down to .7 mm then lean the bottom end until the motor will hold an idle. When you bring the car in to rest, let it sit for 10 sec, then give it full throttle and lean the bottom end needle until you get a crisp take off with no blubbery rich sounds. Now do some high speed runs and set the top end needle for good clear performance, ensuriing you have a good exhaust smoke trail at all times. If you needed to adjust the top end by a signifigant amount, re visit the bottom end needle and re set as before , as adjusting the top end will effect the bottom end.

Also try another plug. Even new plugs can be shonky sometimes. A motor that dies on reving up or dies a few feet out on take off can sometimes be a dying glow plug.
Your fuel should be fine unless it's really old and stale.