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PostPosted: Sun Mar 06, 2011 12:58 am 
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BMX
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Joined: Sat Mar 05, 2011 11:35 pm
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Location: Hawaii
hello to all,

newbie here on forum. been reading a lot and learned a lot of good information.

The question I have is what is the stock carbeurator size of the SYM dd50? I have heard/read 12mm. can anyone confirm.

also if it is 12mm what would be the largest main and pilot jet that i could run with the carb before having to just upgrade to a larger carb?

I have a 2010 SYM with a 43mm bore kit (60cc i think) with the stock carb and airbox. I am currently running a 40 pilot and 100 main. the bike runs OK but it revs out at the top end. i was wondering if i should upjet to 105 on the main or would that be too much for the baby stock carb.

any insight would be great.


Last edited by HI808SYM on Mon Mar 07, 2011 4:45 am, edited 1 time in total.

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PostPosted: Sun Mar 06, 2011 3:44 am 
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CBR1000RR
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An 80 pilot jet for60cc? lean that out. are you planning to keep the stock air box?

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PostPosted: Sun Mar 06, 2011 5:48 pm 
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CB900F
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is the bore new?

just run 105 jet and check plug color and add oil in gas and fill up oil in oil resirvor..


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PostPosted: Sun Mar 06, 2011 6:13 pm 
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BMX
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thanks guys. yes its a new bore (about 600 miles on it) and yes i want to keep my stock airbox.

I took out the plastic tab form the inside of the airbox but i havent drilled any holes or anything.

I was running the stock pilot (38 I think) and i was running too lean.

am i correct on assuming 12mm for the stock carb?

should i get a 17 or 19 mm that can bolt to my stock intake?


Last edited by HI808SYM on Mon Mar 07, 2011 4:45 am, edited 1 time in total.

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PostPosted: Sun Mar 06, 2011 6:17 pm 
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Elite
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If it really is a 12mm then id go small on the aftermarket carb and go with the 17.
I believe arreche makes a 17.5mm

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PostPosted: Mon Mar 07, 2011 4:46 am 
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BMX
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Joined: Sat Mar 05, 2011 11:35 pm
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Location: Hawaii
can anyone confirm 12mm for stock SYM dd50 carb?

thanks again for all the input.


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PostPosted: Mon Mar 07, 2011 9:22 am 
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Don't get confused on the 12mm (which is the carb measured at the narrowest point) with the size of the mouth, which is more like 15mm. Methinks you guys are talking about different things.

I don't think you need to re-carb, I think you need to take a look at your plug and see if you need a re-jet.

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