I just got a new longtail. It is a 420cc predator engine I installed on a go devil longtail. I am running a 1544 alumacraft all weld. Motor does great with 2 people but is a little slow with 3 or 4. With 2 people I am going 17 to 18 mph with 3 or 4 I am going 12 to 13. I have a 9in prop on there right now which seems to be doing fine no bogging down rpms are up there just fine. What websites are out there or stores that would sell hop up kits or air filters or exhaust for these engines? I am looking to just add a few mph until I can get a larger engine. And where do yall get the module that keeps track of engine hours?

lots of info and vendors on the go kart sites. Take your pick.

Mark F. Cheney

gt you a TINY TACH to keep track of engine hours and rpm

Yeah a tiny tach is the next thing im getting for it.

As far as cart sites which ones are good?

Nr racing for intake and velocity stack
Affordable go karts for everything else
Robertson torque tubes for the exhaust


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For a longtail on a 15 footer , with a stock motor is pretty good speeds . But , go to NR racing if you want some more pony's .