its to give the engine extra full after the high rpm end straigt line

In a 2-stroke the lubrication is provided by the fuel that gets in the engine, it also cools down the piston. When you're at high rpm, the piston gets hot and so do all the bearings inside the engine. When you let off the throttle you interrupt almost completely the fuel flow, starving the engine of lubrication and cooling. If you do that you risk seizing a piston or getting the engine very hot and indicing very bad knocking/detonation which also will not make your piston very happy. You put the engine in front of the airbox to create a slight vacuum that increases fuel flow momentarily.

hello Zax! thankyou, i run 10-86, bus with ibea carb, thats what you need, with a walbro you will not have the same as with Ibea carb , grtzzzz

Entièrement d'accord j'ai décroché du Kart avec l'arrivée du rotax max et ce qu'ils ont fait par la suite(liquide et embrayage) , des kart qui absorbent les sensations et qui coûtent une blinde.... Mais avec le retour du f20000 on revie....

Nice idea! We have plenty of those engines :D

about 110kph

Ja die is dodelijk 🙈

178 km/u with slipstream an 172 km/u alone

You're doing it to flood the engine since 2 strokes are lubricated by the fuel they run. After running at top rpm by the end of the straight the engine has been strained at high rpms so, while you are still at full throttle just before you brake for the corner, you cover the airbox and flood the motor, this ensures it is lubricated well and prevents a seize which is especially important in direct drive applications

5%

@@gilmertens8634 it depends on the oil. Be careful, with some (shell if my memory is ok), 5% is not enough. you will need 7% with shel oil.

The more revs, the more oil - and the same for heavy loads, direct drive being really bad about heavy loading…

you close the air off, and the engine take a gab off full

"gab off full"...what does that mean? and when exactly should you be doing this? btw - great vid

By closing the air off the mixture gets rich and it Lube the engine

@@nazzytpr indeed, its like that !

120 or so

laaaaang lang geleden hebben ze dat eens georganiseerd maar was maar 1 keer

Is het gewoon tandwielen aanpassen naar een “ groot circuit “ en vlammen maar ? Of moet je meer aan de kart veranderen ?

@@LeFollon tandwielen zowizo; en ook de carburatie wat rijker zetten

Thatsbfor giving the engine more full, you shut off the air...very important, other time is you have 2 screws on the carburator, you can give the engine more ore lower full on the botthem ore high rpm wen the engine runs to lean ore to ritch

Krisztián Ambrus no, vortex VL98 100cc air cooled

Gabriel Altland when they were raced properly in the 90’s a new piston every 45 mins and a full rebuild at two hours to be safe (20,000rpms!)

@@Luniemiester1 What does that cost?

@@teter129 just the connecting rod alone is 180€, 60 for the piston, add alll the other stuff and you're looking at around 300€ per rebuild if you build it yourself

2006adfer 10-85

i think its not faster, 100cc 20 years old . x30 new generation + 25 cc more, bud iff you have a good engine and good carburation it will be not slower , number sprocket 10-85

Yeah I have an x30 and do not underestimate the kart in this video because it’s mad quick, but x30’s are the quickest single geared karts and are quicker

Karts would be pretty close in times. X30 kart is 50 lbs heavier or more, 100 is very light and nimble handling. 100cc rebuild after every race weekend, x30 rebuild after 10hrs or so.

​@@tiger4108 Is an X30 quicker than a Rotax ? I think the Rotax is slightly more powerful but its power curve is a bit weirder so if you have any idea about which would be quickest.

This would eat an x30 for dinner. Older 100cc ICA's were pretty much no holds barred.

It’s a choke or he’s leaning the engine off

@@KaiRogersKarting alright thanks 👍🏻

Thanks mate!!

Marco Scheiber thank you my friend!

What is the effect of choking the engine under braking?

@@RC99mx when you run the engine flat out the fuel evaporating in the cylinder is what it keeps the piston from melting, when you let off the gas to break the piston is really hot, and it barely gets any fuel to cool it, and by choking the intake you increase the amount of fuel that gets into the engine giving it extra cooling and preventing knocking or even melting a hole straight trough it. I hope it was understandable

@@JDTeam im 35 have engine vortex 100cc from 2008 still doin it that choke and love it :))

the choking seems pretty difficult since you gotta do it every single corner and also you have to time the braking and choking and get your 2nd hand in the wheel in time

hello, i'm very happy with the sodikart, for me is the stabilitie off the chassis better than the other chassis

neen, wss in genk

Ah oké doe jij mee aan bnl van Genk dit jaar

yes mate, kosmic T4

Michael Ray thank you, indeed this is real karting, i just love it

U don't have to be fully off the throttle, just a little bit

Yes I agree but you can keep going if you see the accident and know what not to do

@@tiger4108 Just lucky he didn't seize whilst at max revs at 6:28, or you'd have 4 broken legs. I'm sure he knew what not to do, not to have a mechanical failure

@@nicelittlerunner ive seized an engine before at pfi going under the bridge at over 100kmh its not fun luckily didnt hit anything

chocking by putting the hand on the air intake to cool and lubricate the engine

Francisco Dias Rosa olá francisco