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Should make for a real stump puller but it'll run into a wall at 4000rpm where the heads and cam become a bottleneck. Without actually sticking it in DD I'd guestimate 375tq any maybe 250-260hp. I figure about 9:1 CR with those heads based on a stock motor with 69cc heads made 8.3:1 CR.
ok! thats sounds like good for my bronco with stock axel and 35"
i will use it for dayli driving and haul a smaler trailer with two 990 adventure bikes or atv.
i was looking for strong torque and economy