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Dellorto VHSH 30 and RB20

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Dellorto VHSH 30 and RB20

Postby corrado » Fri Nov 13, 2015 7:09 pm

Forthcoming BSSO production racing class is to feature exclusively this combination with Franspeed race pipe. Has anyone got experience of this carb / kit combo to offer a ball park starting point for the jetting?
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Re: Dellorto VHSH 30 and RB20

Postby Markpm » Sun Nov 15, 2015 1:16 am

I will check in the morning as I can't remember
Thinking 168 main
55 pilot(maybe smaller though)
1.5 down on clip
Dq266 atomiser
300 float valve
Strobed to 17 degrees
Runs pretty nice around town
Great on the motorway
Ps this has a franspeed road pipe though so could be worthless info
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Re: Dellorto VHSH 30 and RB20

Postby corrado » Wed Nov 25, 2015 3:48 pm

Got this from AF's website.

Starting point for jetting Dellorto VHSH 30
Slide – 50
Needle U16 3rd clip from top Factory fitted with K98
Needle jet (atomiser) DQ266 Factory fitted with DP268
Main Jet 170 Pilot Jet 45 to 55.Factory fitted with 180 main & 60 pilot
Float Valve 300 minimum Choke Jet 50 Factory fitted with 60 choke
Mixture screw 2.5 to 3.5 turns out
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Re: Dellorto VHSH 30 and RB20

Postby corrado » Wed Dec 27, 2017 5:32 pm

AS the BSSO production class has now done a couple of seasons with the RB20, Franspeed race & VHSH30 combination what's the general consensus for optimum jetting?
I've used my RB20 for sprinting but feel the VHSH might offer a bit more top end than the PHBH currently fitted.
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