jayhawkatv Posted October 18, 2013 Report Share Posted October 18, 2013 I'll make this quick... Have a 4 mil sc drag bike. The clutch wasn't slipping enough and it was bogging down to much. so I switched to all stock springs. At the dunes it does pretty good but I have to feather the clutch quite a bit. At the track it bogs to where,r I have to double clutch it. If I give it to much gas it just stands straight up (+10 swing). I know how to pilot btw. My question is how many coils do I need to cut off the springs to get it to slip a little more and how many springs should I start cutting on. Thanks Quote Link to comment Share on other sites More sharing options...
Surfrjag Posted October 18, 2013 Report Share Posted October 18, 2013 Did you try removing a spring completely? Quote Link to comment Share on other sites More sharing options...
camatv Posted October 18, 2013 Report Share Posted October 18, 2013 you need a better frame setup. gearing and or tire Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted October 18, 2013 Report Share Posted October 18, 2013 Start with two but u should really get a spring tension gauge so you can do a baseline and then you know where you have been.i never just take springs out because I want equal pressure on the clutch pack.i measure tension of all springs so I know total pressure then adjust a lil at a time Quote Link to comment Share on other sites More sharing options...
SlowerThanYou Posted October 18, 2013 Report Share Posted October 18, 2013 Start with two but u should really get a spring tension gauge so you can do a baseline and then you know where you have been.i never just take springs out because I want equal pressure on the clutch pack.i measure tension of all springs so I know total pressure then adjust a lil at a time I'm glad sleeper has a clue. you need a better frame setup. gearing and or tire IMO, that's a totally old school answer & there's nothing wrong with old school. Clutch tuning is not a magical fix for all that ails a dune/drag bike. The overall set-up needs to all work together to get the desired results. I would start with the cheap areas first to try & resolve your issue(s). I don't think the lower spring pressure alone will solve your problem. Used with other tuning areas like camatv mentioned, along with other areas should help you out. Quote Link to comment Share on other sites More sharing options...
jayhawkatv Posted October 18, 2013 Author Report Share Posted October 18, 2013 ok so where should I Start? Quote Link to comment Share on other sites More sharing options...
SlowerThanYou Posted October 18, 2013 Report Share Posted October 18, 2013 ok so where should I Start? I would start by providing more information on your set-up. Quote Link to comment Share on other sites More sharing options...
Surfrjag Posted October 18, 2013 Report Share Posted October 18, 2013 What size and type tires are you running? Quote Link to comment Share on other sites More sharing options...
jayhawkatv Posted October 19, 2013 Author Report Share Posted October 19, 2013 10 paddle ext, 73+ ro, +10 arm, stock lightened and extended chassis, +3 forward arms, bike makes 96 hp, 50lbs tq. I have 42 grams of weight on the lockup, running all stock springs with a f.a.s.t clutch. need to know anything else? Quote Link to comment Share on other sites More sharing options...
dozer Posted October 19, 2013 Report Share Posted October 19, 2013 Gearing and what gear you leave in. Kyle if its overly rich or not enough timing it will bog untill it gets movin. Quote Link to comment Share on other sites More sharing options...
SlowerThanYou Posted October 19, 2013 Report Share Posted October 19, 2013 10 paddle ext, 73+ ro, +10 arm, stock lightened and extended chassis, +3 forward arms, bike makes 96 hp, 50lbs tq. I have 42 grams of weight on the lockup, running all stock springs with a f.a.s.t clutch. need to know anything else? Gearing, 1st or 2nd gear launch, rider weight, amount chassis is extended, timing/ignition, pipes & carbs/fuel. I think that will give us a bigger picture. Quote Link to comment Share on other sites More sharing options...
jayhawkatv Posted October 19, 2013 Author Report Share Posted October 19, 2013 2nd gear launch now was running first gear.chassis is +6 out of the front, 200lb rider, on alky 39 pwks,timing at +7, stock cdi,shearer oof Quote Link to comment Share on other sites More sharing options...
m671054 Posted October 19, 2013 Report Share Posted October 19, 2013 Sprockets and primary ratio? Quote Link to comment Share on other sites More sharing options...
dozer Posted October 19, 2013 Report Share Posted October 19, 2013 You play with timing any on the dyno? +7 is "usually" race gas territory, alky can "usually" handle a few more degrees. in case anyone was wondering by sc in the title he means stock cylinder not super cub. Quote Link to comment Share on other sites More sharing options...
jayhawkatv Posted October 19, 2013 Author Report Share Posted October 19, 2013 running 14 41 gearing and stock primary ratio. 15 41 bogged to much. thought it was because of the tires size 1 Quote Link to comment Share on other sites More sharing options...
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