hi i bought this 4 wheeler and wondering if i should leav it or build it , or pros and cons, got twoo complete motor have a 91 and a 87 i beleive right now running the 91 set up . but i cant help looking at the 87 set up . the carberator intake is double the size of the 81 i was told its eassy fit to put on the quadzilla carb . a guy told me can get an unbeleivable 172 km h with somewhat that set up and looked pretty serious about it i beleive mine its the 130 ish at the moment so if could get a few quotes on wich set up would be the funnest and without being a lemon thanks

 

i would go with the 87 motor as long as the engine cases were in good shape without jb weld

 

what i thought. i beleive owner blew that sleev and just ended up switching the heads from one block to another .so right now have the 91 head on it . maybe you could tell me this or someone does the main carberator jets fit from a mikuni into a keihn carberator set up , i was told my bogging could be due to my jet being to big i beleive i could have the jet set up for the 87 modified and or els can just put the mikuni carb in its place but just curious

 

No mikuni and keihin jets dont crossover.They are specific for each.Yes you can use either carb on either cylinder as long as it rejetted for each.The 87 has a much bigger intake than the 91.So in theory it has the highest hp potential