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28mm delorto phbh jetting

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28mm delorto phbh jetting

Postby Jonle » Tue Feb 04, 2020 8:07 pm

Hi all, I'm currently in the middle of building an engine, was going to use a 28mm delly just need some ball park figures on the jets I needed to get me started.
its a , rt225 with a 60x110 crank, bgm pro clubman v4 exhaust, probably will be running open mouth or through a foam filter with the panels on.
Any help greatly appreciated, Jon
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Re: 28mm delorto phbh jetting

Postby ULC Soulagent » Wed Feb 05, 2020 1:16 am

Ball park settings


28/30mm Dellorto PHBH, standard piston ported RT kit, starting rich and work down (28mm would use the weaker sellections)



Main 125 - 122 - 120 (open) 122 - 120 - 118 - 115 (filter)
Atomiser AV266 - AV264 - AV262
Needle X2 - X13 - X7, 2nd - 1st down
Idle jet 55 - 52 - 50
Slide 40 - 45 - 50 - 55
Choke 70 - 60
Float needle valve 3.50 - 3.00
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Re: 28mm delorto phbh jetting

Postby Toddy » Wed Feb 05, 2020 6:52 am

one i did a year or so ago

Carb Set Up ( RT225)
Dellorto 28 mm PHBH/BGM Clubman
Slide 40
Needle X7/ P2
Atomiser AV266
Main Jet 128
Pilot 55
Choke 60
Needle Valve 300
GP200 Indian GBOX 19x46 82 link 4.7
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Re: 28mm delorto phbh jetting

Postby Jonle » Wed Feb 05, 2020 8:31 pm

Muchas Gracias :D :D
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