Handlebar choke kit /cooling/tuning aid/engine saver

[Darrell Taylor]

below is part of a pm i sent also that may be of use to you wack and others

as rpm increases you get a greater draw on the atomiser so
a 100 mjet at 7000
behaves like a 102 at 8k
and 104 at 9k

so adding additional circuits like power jets allows finer tuning that 100 main can be an 80 main with a 20 power jet giving a cleaner transition but still delivering 100

each time you increase one circuit it overlaps the next so a bigger main may need 1 clip leaner needle or vice versa
u can have full throttle delivery at 3k so delivering off the main jet occurs with the pilot and needle together so u can see how these overlaps interact ,i see it on the lambda readings everytime i dyno so is quite a familiar site

power does come from improved cooling effect its not more ,its a case of returning the power you just lost thru heat

the choke jet runs in conjunction with an air gallery so is in effect a minature carburettor,i ran dyno tests with a 60 choke removed and replaced with in the end a 25 jet and with a carb size restriction in our racing class of 19mm the 3mm bore choke gallery with the 25 jet effectively made it a 22mm carb but legal in class rules it outperformed the larger 21mm carb that some other teams cheated with so your carb with choke on at full chat might have a good gas speed thru the choke gallery and might not enrichen as much as people would think

[Andy Pickering]

Thanks Darrel, I hope to fit it tomorrow

Probably the perfect add on for yourself Eden

Sent from my GT-I9300 using Tapatalk 2

[Darrell Taylor]

a fitment aid to ease the task of getting/cutting the cable length correct would be to drill a small pilot hole thru the back of the choke lever to allow the cable to pass thru then the inner can be pulled whilst the solderless nipple is nipped up,id also fully adjust the choke end adjuster and if u cut the cable a mm or 2 too short u can always back it off to get some free play back

eden, pop the spare nipple in ur toolbox i added

[bizzly]

Paul dropped mine off today thanks Darrell... cheers m8

[Darrell Taylor]

cheers Bizz

ive drilled all the latest kits so the cable feeds thru the lever now

got a new batch made up for those who were waiting

[Adam_Winstone]

Is this ON/OFF or can it be applied to different degrees (no pun intended!)? If variable then this could be adapted to work as a control for a spring loaded stator's rotation/timing method (as per German/Austrian bloke's Vespa that was featured in Scootering).

"Anyone who has tried using a std choke whilst riding will at least once have found themselves either in the gutter or on the wrong side of the road", Paul (LateAgain) really liked watching me try to do this on my standard carb Vega 125! (lol) On a Vega it requires half turning around, leaning down and reaching backwards!

Adam

[wack 63]

[Darrell Taylor]

thanks for feedback wack good or bad thats fine
few questions
what carb was it?
was the cable dropped into choke at 90 degrees or straight
is the pinch bolt on the lever too tight
did u tie the cable back properly along its route

[wack 63]

[Tosh]

i used to use something like this on my 500cc kawasaki mx bike in the early 80s when we
used to do beach races,we`d pull the leaver in at the end of a very flat out long straight
as to open the choke to hopefully help it not to lock up before we`d knock it down a gear or three
as we hit the soft stuff to keep the front end light