carby T vent kit....fact or fiction?

[firko]

I spotted this kit on eBay and it roused my curiosity as to whether it's a good thing or just another crock of technical bullshit . Anybody tried it?
   
http://www.ebay.com/itm/YAMAHA-YZ490-YZ-490-CARBURETOR-VENT-HOSES-CLAMP-KIT-AHRMA-VINTAGE-1982-1991-YZ-/290938732651?pt=Motorcycles_Parts_Accessories&vxp=mtr&hash=item43bd4cc06b


                            "T" VENT SYSTEM NOTICEABLY IMPROVES THROTTLE RESPONSE THROUGH WHOOPS AND JUMP LANDINGS

CARB OVERFLOWS FREELY ELIMINATING VAPOR LOCK

(KEIHIN PWK CARB IS SHOWN FOR DISPLAY AND IS NOT INCLUDED)

FITS ALL 2 STROKE KEIHIN AND MIKUNI CARBS FROM 1973 THROUGH 1993

MX BONZ WURX CARB KIT The original better clamps and tubes and still the best First introduced in 1997 by MX BONZ the WURX CARB KIT has been imitated but never duplicated 85 Durometer shore A polyurethane tubing cut to proper length eliminates guesswork This hose is made in the USA and MX BONZ is proud to provide proof upon request and that the American Employee is supported whenever it outsources its raw polyurethane and plastic materials

Features both intake and air boot clamps  Clamps are supplied by ABA of Sweden a country deeply rooted in motocross tradition and are the hidden secret to the MX BONZ WURX CARB KIT These clamps eliminate all air leaks enabling the tuner to accurately jet the carburetor without a doubt

Kit includes heat shrink tubing to join the upper vent loop factory works style

USE THE PICTURES IN THE LISTING FOR CORRECT ASSEMBLY

KITS ARE SHIPPED UNASSEMBLED

USE A LIGHT GREASE ON THE "T" FITTINGS WHEN FITTING HOSES

WD-40 ON HOSES ENABLES THEM TO BE PULLED THROUGH RETAINER RINGS EASILY

[TM BILL]

They do work Mark but you dont need the fancy kit you can just put a T piece in your original hoses and put your vent hoses above the float bowl. I dont think they are nessercery on vintage tracks , they do stop bogging on landings from big jumps .

[yamaico]

I don't even "T" mine - just join the two up over the top and cut some small slices out of the side with the stanley knife. If you're interested Mark I can sell you the kit for only $199.99 + p&h. Just hit the "buy it now" button.

[tony27]

Dellorto carbs on trials bike use the same system as you describe  Pete but loop under the carb, seems to work except in deep water

Have a look at a modern Keihin PWK carb at some stage, they have vent hoses exiting straight up as well as sideways to loop down to the rear of the cases so the manufacturers must think there is something in it

[Mike52]

Just what I need , now I can do airials on my TS100.

[Nathan S]

They're great for water crossings - stops the rapidly cooling air in the carb from sucking water up the vent hoses. I got stopped in a case-deep creek crossing that caused me some undue stress at the four day...

Never felt the need on an MX track. Then again, most modern carbs have the T-pieces effectively built in to the carb body.

[firko]

Just what I need , now I can do airials on my TS100.

Which reminds me.....I'll check on that TS90 cover for you Mike.......I'll report back a bit later after my visitors go.

[Mike52]

Just what I need , now I can do airials on my TS100.

Which reminds me.....I'll check on that TS90 cover for you Mike.......I'll report back a bit later after my visitors go.

Check your pm,s Firko , Tim came good with a heap of stuff.

To stop water getting in the carb via hoses we used to loop them up over the carb and down the other side .
Seemed to work ok.