Downsizing Ke70 Carb Jets

[Tham]

Hi Felix,

 

In this post, you mentioned you downsized the jets of

your KE30 carburettor.

 

http://www.rollaclub.com/board/index.php?s...st&p=129102

 

 

May I ask what jet sizes you downsized them to ?

 

I'm not sure of the stock jets for the KE30, but those

for the KE70 are 105 primary, 168 secondary. The idle jet

is 50, I think.

 

The idle jet also looks too big, as consumption seems high

even when just idling.

 

Over here in Malaysia, it's a bit hard to find just replacement

jets alone for sale. Most come with carb kits, such as those

"Keyster" brand ones, and are standard stock jet sizes.

 

Thanks very much.

[Felix]

Hey Tham,

 

I'm not sure exactly, but I think it was something like a 97 primary, 165 secondary.

 

I've been playing with carbs for many years so have accumulated a reasonable collection from old carbs and others from carb shops. You could always look on ebay for "jet drills" and solder up your existing ones and redrill them.

[Tham]

Thank you, Felix.

 

That would be about 8 % smaller for the primary jet,

which accounts for most of the running in downtown driving.

Initially I thought you had used about 85 or 90 for this jet.

 

I'll try looking around.