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12-09-2016, 09:43 PM | #1 |
Join Date: Dec 2015
Location: coastal SC.
Posts: 206
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Jets and idle
I put in the 80 cc kit runs great but hard to get started and idle is bad and it is needing more gas I have put a cone filter on as well but still have stock muffler and suggestions
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2016 TT250 2014 NSS300 FORZA 2014 UN200 BURGMAN |
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12-10-2016, 11:06 AM | #2 |
Join Date: Jan 2008
Posts: 221
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Pilot and main jet sizes?
If using the stock head which has around a 5cc combustion chamber . . . 39mm bore (50cc) = around 10:1 static compression ratio 44mm bore (63cc) = around 12.6 static compression ratio . . resource 47mm bore (72cc) = around 14.4:1 static compression ratio . . resource 50mm bore (81cc) = around 16.2:1 static compression ratio 52mm bore (88cc) = around 17.6:1 static compression ratio For comparison . . . Sym 50 11.8:1 Honda Ruckus 50 11.9:1 Yamaha Vino 50 12:1 Static Vs. Dynamic Compression Ratio 1 teaspoon (4.9 cc's) in a stock 139QMB cylinder head . . . Last edited by tortoise; 12-14-2016 at 12:15 PM. |
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