lighter or heavier flywheel on srx
the theory goes, for drag racing, heavier flywheel will give a larger torque output.
lighter flywheel will give you a quicker reving motor with lower torque, more for snowcross style running where your on and off the throttle.
i think allen dynoed a srx crank and viper crank the srx crank had about 2ftlbs on the viper crank.
the difference is minimal
someone correct me on the numbers if they remember better.
lighter flywheel will give you a quicker reving motor with lower torque, more for snowcross style running where your on and off the throttle.
i think allen dynoed a srx crank and viper crank the srx crank had about 2ftlbs on the viper crank.
the difference is minimal
someone correct me on the numbers if they remember better.
mopar1rules
Active member
BETHEVIPER said:
yes, lighter flywheels will give you a quicker revving engine. when you let off of the gas, it will want to get out of the powerband a little more easily, cause the loss of mass on the lightened flywheel. so, i don't see it aimed at snowcross applications, were you need to have it not falling out of the powerband so easily, when you are letting off the gas for corners, and then getting back on it. also, the lightened flywheel is more for drag racers, where they only have to worry about it revving up quickly and going down the run strip. they are not on/off the throttle, so the lighter flywheel not wanting to help hold the motor in the powerband when off the throttle isn't going to matter. lightened flywheels are also not directed for trail applications either. learned all this from my banshee modding times
i ask cause i know 2000 and up have a lighter flywheel ...will see the difference during winter
mopar1rules
Active member
'00 and newer had a lighter flywheel? how much lighter? why are you worried about the flywheel? did you get one lightened or something?
no i just switch from a 98 to newer 2000 and up ..so just try to see if someone see difference about it
i can tell you on a motocross bike,at least the old school 2 smokes by adding weight to the fly wheel it would make the bike have a broader power band.the main benefit about that was on a slick track it would become much more tractable -ie better traction less wheel spin.on the dyno the hp numbers were the same ,however it was all about the curve.in the early 90s the factory teams had some real trick setups,they used a centrifical setup on some tracks for certain applications.
well i know on motocross bike they put a heavier so the bike doesnt wanna stall every slow corner..it keep the swing of the motor ...i know a little just try to see if someone have experience a difference bettween a 98-99 and the 2000 and up
mopar1rules
Active member
yep, the lighter flywheel will make the engine feel/have a narrow powerband. that's why i said it will want to fall out of the powerband when letting off the gas. the heavier flywheels will help keep the engine cycling over and that's why the powerband seems/feels wider. 
i will see the difference went the snow will fall ..if i can get all my parts together
mopar1rules
Active member
you probably won't notice much of a difference, but let us know how it goes once the snow flies. it will probably be hard to tell on the first ride, or at all, cause as we all know that on the first ride of the year, they always seem the fastest and all