Zenoah 260 carb. diaphragam

[DAVE MARSON]

I have a Zenoah 260 ....I've heard there is a kit/mod to eliminate the carb. diaphragm....I've looked but can't find any info on this ...can ya help with a link or more info........thanks

 

[Kevin Sheren]

BH Hanson has them.

 

[Danny King]

K1-WYTA

 

[Lamar_Huff]

Technically you aren't eliminating it... you are just replacing it with something that doesn't need to be repalced nearly as oftern (if ever). The item you are looking for is WALBRO K1-WYTA - KIT-SPIRAL DIAPHRAGM.

Here's a video explaining it and how it works CLICK HERE

Thanks,
Lamar

 

[DAVE MARSON]

GREAT info ....thanks guys...know I could count on you
is this mod allowed in stock mono?

 

[Mark Anderson]

Since you are from Stockton, I will asume you are refering to NAMBA G-Limited. I copied this from the rulebook-

(f) Any fuel pump diaphragm may be used.
(g) Any metering diaphragm may be used

 

[DAVE MARSON]

Thank you Mark and everyone that responded......

 

[Wesleys Custom Graphics]

I've been using the spiral diaphragm for a year now on 5 different motors and have eliminated all my carb issues. I tend to over fill my bag fuel cell sometimes and I think that may have stretched the diaphragm at times. Either way I havnt had to replace the diaphragm for over a year.

 

[Alan Elzer]

Technically you aren't eliminating it... you are just replacing it with something that doesn't need to be repalced nearly as oftern (if ever). The item you are looking for is WALBRO K1-WYTA - KIT-SPIRAL DIAPHRAGM.

Here's a video explaining it and how it works CLICK HERE

Thanks,
Lamar

Thnx for sharing Lumar1

Technically you aren't eliminating it... you are just replacing it with something that doesn't need to be repalced nearly as oftern (if ever). The item you are looking for is WALBRO K1-WYTA - KIT-SPIRAL DIAPHRAGM.

Here's a video explaining it and how it works CLICK HERE

Thanks,
Lamar

Thnx for sharing this

 

[Tom Foley]

Great video !

 

[Daniel's Racing]

Depends on the carb number you are running as to what number you need.

Most carbs we use and one that had primer bulbs but have been modded to run without the primer bulb use K1-WYTA

257 No primer

1048 No primer

990 Primer

813 Primer

There are 5 different part numbers actually, The two that got cut off were K4 and K5

 

[Ron Manucci]

Very interesting. Thanks for the video Lamar.

 

[seaducerpete]

Are these allowed in Impba stock mono

 

[Stephan Peterson]

Yes legal in IMPBA Super Sport Engine specification rules for Super Sport Mono, Classic Thunderboat and Cracker box. 1. Spec engines will be a Zenoah G260 PUM ONLY. Maximum displacement will not exceed 1.555 cid (25.5 cc) 2. The engine may run an unmodified Walbro 257, 1027, or a 644 with choke carburetor. Original Equipment Manufacturer (OEM) Walbro spiral diaphragm may be used.