kx 500

[stewart]

exh open for 200 deg and transfers open for 130 deg stewart

[flotek]

Originally Posted by stewart

exh open for 200 deg and transfers open for 130 deg stewart

cool ,thats pretty aggressive sprecs for a 500 engiine ,yo u have sub exhaust ports right,, what is there duration? sounds like a good combo with lots of blowdown ,you might get some more gains by running a little higher transfer by a few degrees

[hpunlimited]

stewart,this is interesting for i have 2 kx500's and am making one a dirt drag bike only.what rod # is in the lectron in order to use alky.i have one thats gas setup with 6-1 rod.(44mm).about to bolt on 89mm top end with down pipe off yz250 flattrack bike i used to have.i'll check back often to see how it goes.

[stewart]

got bike ready to dyno on sat rode with street tire on tonight for seat of pants feel moter felt very aggressive and peaker but it was hard to tell increase because of tire spin and wheeling i have ridden big bores since 83 when i had a kx 420 then 4 kx 500 hooped up and cr 500 but first time i was ready to get off bike was tonight cant wait to dyno i hope it stays in one piece felt like kx 80 with 90 rear wheel hp love to have input stewart

[hpunlimited]

man does that sound good.can't wait either for results.if you have a chance try reed cage spacer to see if it would make power curve a little broader without losing peak#'s.i put one on a 84 cr500 and it help with rideability without lost on top end.too much wheeling at any time cost some races.i also use the mossbarger cage.like these!good luck

[stewart]

well we started dyno test at 9 am made about 20 pulls got some gains first of all found best power at 3 degree adv tried many settings found best plug was ngk9 tried 8 10 etc ran in to wall getting power past about 76 rear wheel hp gained some with out air cleaner and seat tried all fuel settings lean to rich on akly i feel need more spark amps from my experince with 100s of akly car racing engines but also saw it was pushing bike and tire around pretty hard on dyno drum wondered about clutch slipp i have all best clutch stuff in it new springs etc, any input stewart

[flotek]

my thoughts are this ,alky loves compression and high port timing but high compression tends to blow out the spark and in my opinion you should look into a Nology high output coil wit htheir hot wires and plug,i have this mod on my cheetah cub banshee ,for a single cylinder Kit it is only like 95$ and i bet youd see some gains .it definitly sparks a lot stronger-you can feel it respond better and visually see a very strong white arc off the plug

[stewart]

thanks eviltwin i will get one ordered monday and re dyno tuesday will post results i felt my stock system was at its end stewart

[hpunlimited]

will the nology coil work with all kx5 or is there more than one #for the different ohms for pre 90 bikes.mine being a 89 calls for i think 5.0-6.8 and 90 on says 2.6-3.6 ohms.

[tecateboy]

with the nology coil, would that have any real gains in performance for a stock tecate?