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Discussion Starter · #1 ·
It seems most want the Delardo or copies for carbs on these bikes.

Just wondering if/why a Mikuni/Keihn wouldn't work? Of course it needs to be the right size and all.

Just curious as the parts availability seems to be so much better and the 2S dirt bike crowd seems to love them. I was recently reading how the better ones now use a sort of crude FI setup via a little pump that draws very little power. It's still a carb, its just a pressurized system for the low end/midrange portion to fight off the tendency to go lean.

Anyone tried it?
 

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In my younger years most of the karts at the track ran pumper carbs,,,,,theyre a fuel pump that acts like a fuel injector but is a carburetor.....

Spend a lil money and put a Tillotson carb setup on your bike and youll never look back...Just contact them direct and tell them what your application is and theyll hook you up with a perfect power package carb.....

http://www.tillotson.ie/products-carb-specialty.php

You can of course put a Mikuni or a Keihin carb on your bike but those carbs can take up alot of space...They have to be setup on the lean side for the pilot jet and atomizer tube like a 12 or 15 pilot,,q2 atomizer and something between 93 and 103 mainjet for a 19mm one

 

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Ok, so a diaphragm style then. Hows the transition/throttle response when compared to a Delordo?
Its like the difference between an oldschool carbbed engine versus a newer style fuel injected engine....The throttle response is so crisp and snappy,,best part is you can easily dial-in the pumper carb between heats without doing anything more that twist a few screws...........The technology is like digging a hole with a backhoe over using a metal shovel

Theres just too many variables to alter the tune with a float type carb...My cags werent any fun with the floater carbs,,after fitting the engines with pumper carbs they actually became quite fun and alot quicker aswell as easy to tune...................



This 70cc methanol powered mcculloch is the engine I stuck on my blata 2.5 that I busted my neck on...on a JrTonykart this engine had the kart hitting 85mph

 

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Discussion Starter · #10 ·
Its like the difference between an oldschool carbbed engine versus a newer style fuel injected engine....The throttle response is so crisp and snappy,,best part is you can easily dial-in the pumper carb between heats without doing anything more that twist a few screws...........The technology is like digging a hole with a backhoe over using a metal shovel

Theres just too many variables to alter the tune with a float type carb...My cags werent any fun with the floater carbs,,after fitting the engines with pumper carbs they actually became quite fun and alot quicker aswell as easy to tune...................



This 70cc methanol powered mcculloch is the engine I stuck on my blata 2.5 that I busted my neck on...on a JrTonykart this engine had the kart hitting 85mph


Ok, so the same basic idea as the Walbro carbs I have on all my giant scale RC aerobatic planes. Tune with a screwdriver instead of a pack of jets and spilling gas everywhere.

Awesome! I can do dat!
 
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