head shim or not?

Summitking, its every thing around the engine, belts, T's , caps. The engine will hold together and the weak point there is the head gasket. Why is every drag race on video at the starting line ? You cant tell who wins at the end.
 
Every drag races was about the same (we did like 30-40 passes...).

TPex and M7 were about even for 300-400 feets, then t-pex got m7 by like 1 length, but I would not call this a win... only thing, I weight 50# more than the M7 driver. :yam: But I can tell you this M7, I rode it and its a fun machine too, very smooth too!

The fastest off the line was consistently the RX1 spercharge 153 and the 800 xrs 162. had the rx1 been 162, rx1 would have won many passes I guess
 


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