Help on carb suitability

[wr200_motard]

Hi Guys,

I have a Honda GB400 and the standard cv carb is giving me some issues, she has done 100,000km and the carb has seen better days. the standard is a keihin VE10.

Anyway I've measured up the standard CV carb and it seems to be a 40mm or a 42 depending on which orientaion you measure the venturi as it seems oval at the slide.

If I replace this with a flatslide 40mm am I going to run into issues? it seems quite large? I realise it will likely need jetting etc and im happy to work that out.

let me know if you think it will work all-right.

Thanks in advance

[spanner spinner]

have a look at http://www.mikuni-topham.de/ENGLISHSITE/Carburetor_kits/Honda_English/XBR500_GB500_English/TM40-6_main.html

fitted a couple of these to hotted up gb500's when they where newish straight bolt on might just need to tweak the jets at little to suit the 400.

[husaberg]

if your heart is set on a set of slide carb's why not base it on the Honda XR design.

[Motu]

A CD carb is not measured by the bore size, although the Japs do - makes it sound like a really big carb, and bigger is better. The venturi size across the mainjet bridge is the true measurement. 40mm is way too big for a 400cc single, 28mm would be fine.