Originally Posted by
Gizmatron
Not my month engine wise...3 port has now followed the 7 port.
.happily .
.well maybe happily isn't quite the word.
.the loss of compression seems to due to a sudden wearing of the crankpin following the rod change..measures 4.98mm at the base but only 4.82 at the tip..needless to say this has produced some very bad slop in the crank/rod interface department..Bugger! But I was thinking of replacing the crank with a 5.5 especially as closer inspection reveals it to be a gen 4 crank anyway..As I only ran it for a short time the rod/piston/sleeve seem unaffected..Oh and to cap it all the GO factory have apparently delayed the MG66 till august sometime..
So I am sad and motorless
BUMMER Giz !!!! My old Gen 4 crank went the same way. The pin ovalled out. Get the new 5.5 crank from Massive. That's what I replaced mine with, and their a nice piece of engineering. Changed the specs slightly for better performance and fit, giving longer engine life. Bummer on the MG66 mate. But like they say, all good things take time - I think it will be worth the wait
Originally Posted by
mattwoodcraft
i agree the p4 med hot plug may be better but i have been using p3 plugs in the old go motors and in the new ones with no problems at all while using the 30 % fuel
....
if your having trouble with your tune are your carby seals all okey ? this will catch people out
I hear ya Matt. The GO's do seem to like the P3 plugs - despite all the theories about plug temps etc. I am running mediums now, but the old P3 goes just as well, if not better on very cold and damp mornings. Only down side is the P3's cost more than double what I'm paying for the mediums here, so that sort of makes it a no brainer for me right now