big bore carb?????
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big bore carb?????
i am converting a 31cc ryobi for my supersportster and i found a walbro carb that is 15mm on one side and where the choke is its 18mm. how can i find out what model it is?? on the choke its stamped 62-40 and on the top 21-245-5-4 on the side were the high and low needels are HDA 60 k1. will it make a big difference in rpms to go to a bigger carb? thanks john
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RE: big bore carb?????
11mm is about right. The membranes are the restricting factor. Trumpeting the entrance duct to the largest size the membrane petal will seal brings a substantial increase in power.
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RE: big bore carb?????
tractor dude-you need a WT324,391 or 347 or I've heard but haven't seen 167. Except I've heard that some 167's have trumpeting membranes. Very noisy,I bet.