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Fitting A New 34Mm Carb Help

#1 User is offline   gavinh 

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Posted 08 April 2011 - 12:36 PM

I am. Fitting a dellorto 34mm VHSB carb on my 2000 aprilia rs 125 I wanted to know how many turns should the mixture screw be turned and how do I fit the 160 main jet? Also is there anything else o need to do?

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#2 User is offline   box 

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Posted 08 April 2011 - 12:41 PM

i thinks its bout 2.5 turns out,to fit the jet
just unscrew the nut in the float cover, ie
the lower half of the carb you will see a brass
nut about 8mm across the hex with a small hole in, that is your jet
unscrew and refit your new one done back up the cover
nut
d

#3 User is offline   gavinh 

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Posted 08 April 2011 - 12:57 PM

Nice one cheers will it make a lot of difference to the power?

#4 User is offline   pego30 

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Posted 08 April 2011 - 02:53 PM

View Postgavinh, on 08 April 2011 - 12:57 PM, said:

Nice one cheers will it make a lot of difference to the power?


depeds what air filter and exhaust you have

if its a standard air box and a decat zaust or arrow equivelent you ideally want 155-158

if its a cone filter 162 - 165 main jet


if you have the standard air box put the 1 60 in and mve the needle clip to its highest position :thumbsup:

#5 User is offline   box 

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Posted 08 April 2011 - 03:07 PM

oh yea, most of us with the 34mm carb
have to run with the needle on the top notch
or secound to top
d

#6 User is offline   gavinh 

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Posted 08 April 2011 - 05:22 PM

It's a 2000 the so standard exhaust with no cat and standard airbox with pipercross flat filter and up 1 tooth on the rear sprocket and down one on the front

#7 User is offline   pego30 

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Posted 08 April 2011 - 05:42 PM

View Postgavinh, on 08 April 2011 - 05:22 PM, said:

It's a 2000 the so standard exhaust with no cat and standard airbox with pipercross flat filter and up 1 tooth on the rear sprocket and down one on the front



155 or 158 main

#8 User is offline   xtreamer 

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Posted 08 April 2011 - 06:20 PM

View Postpego30, on 08 April 2011 - 05:42 PM, said:

155 or 158 main

:thumbsup:

#9 User is offline   gavinh 

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Posted 08 April 2011 - 09:08 PM

Cheers thanks just ordered those

#10 User is offline   GeorgeL 

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Posted 05 July 2011 - 10:02 PM

View Postbox, on 08 April 2011 - 03:07 PM, said:

oh yea, most of us with the 34mm carb
have to run with the needle on the top notch
or secound to top
d


Is it worth upgrading from the 28mm carb? Noticable power increase?

#11 User is offline   box 

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Posted 06 July 2011 - 12:55 PM

yea i would say it is much better midrange
with bit more top end power
d

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