AmishElectrician Posted February 26, 2013 Report Share Posted February 26, 2013 Stock engine-less quad I need some help I`m looking to build a 421 ,but I`m not sure what will be best for me to buy. I mean what kit has the best quality? What do you think will help me have a nice power band from top to bottom and making about 80 horse or more? Quote Link to comment Share on other sites More sharing options...
sheerider1026 Posted February 26, 2013 Report Share Posted February 26, 2013 421 serval Quote Link to comment Share on other sites More sharing options...
AmishElectrician Posted February 26, 2013 Author Report Share Posted February 26, 2013 OK what kind of carbs and transmission i don't want an override i want to be able to gear down on trails Quote Link to comment Share on other sites More sharing options...
Burke Posted February 26, 2013 Report Share Posted February 26, 2013 stock Quote Link to comment Share on other sites More sharing options...
AmishElectrician Posted February 26, 2013 Author Report Share Posted February 26, 2013 ok thanks what will 110 racing fuel do for me? better than premium Quote Link to comment Share on other sites More sharing options...
AmishElectrician Posted February 26, 2013 Author Report Share Posted February 26, 2013 ok but what r the benefits of alcohol and 110 race gas Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted March 1, 2013 Report Share Posted March 1, 2013 A ported stock cylinder with 4mm stroker on race fuel will definitely be capable of making your 80 HP goal. You could go with a serval and get it ported and make the same on pump fuel, but it's more dollars. As far as alky vs. race fuel..... It's kind of an opinion, but alky is not for the lazy. It is a cheaper fuel, but requires a little bit pricier carbs and it will need to be purged in between rides. Race fuel is fun, but you have a totally different looking plug then what you are used to hearing about. 1 Quote Link to comment Share on other sites More sharing options...
Oregon dunner Posted March 2, 2013 Report Share Posted March 2, 2013 I use my 421 cub for drag, trails and mostly hill climbs, I have 19cc domes, 35pwk, 152 main, 48 pilot and needle on the 4th clip. It's has the aggressive port job from HJR and a lock out clutch on a modified stock tranny. +7 on timming and burning 110 octane. I made 96 hp on redlines dyno. I have had zero problems running on the trails. I run a 12 front sprocket and a 43 rear and 22.11.8 10 paddles. It had good wheel spin when I need it in the soft and steep hill climbs and enough gear without winding out in the drags. Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted March 5, 2013 Report Share Posted March 5, 2013 I use my 421 cub for drag, trails and mostly hill climbs, I have 19cc domes, 35pwk, 152 main, 48 pilot and needle on the 4th clip. It's has the aggressive port job from HJR and a lock out clutch on a modified stock tranny. +7 on timming and burning 110 octane. I made 96 hp on redlines dyno. I have had zero problems running on the trails. I run a 12 front sprocket and a 43 rear and 22.11.8 10 paddles. It had good wheel spin when I need it in the soft and steep hill climbs and enough gear without winding out in the drags.wow that is geared low Quote Link to comment Share on other sites More sharing options...
Oregon dunner Posted March 7, 2013 Report Share Posted March 7, 2013 It is. I forget the actual ratio but its in the 3's it works best for my type of riding. I mostly play in the steep hill climbs. I might change the front tooth up one. Quote Link to comment Share on other sites More sharing options...
rjdgriff Posted March 7, 2013 Report Share Posted March 7, 2013 My 421 serval is 15/41 and even then when I drag, I am launching in 3rd... I think I'm going to slap a 16 on front and see how I like it and if its to much I have a 39 rear I'll try out Quote Link to comment Share on other sites More sharing options...
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