GY6 50cc

MStud · 03-31-2016, 10:50 AM

I have a couple concerns on this GY5 50cc motor i bought off ebay for a little project.

Im curious on what this port is for on the front of the engine

also Im curious what are the 2 vacuum ports are for on the intake elbow.

Thanks guys!

rks · 04-02-2016, 08:04 AM

1. Part of emission control system. A lot of folks remove this stuff, then make and attach a block off plate to the opening. There are part suppliers that sell these plates, but they are easy enough to make.

2. Vacuum ports are there to operate fuel petcock/pump, and the ACV/anti backfire valve on the right side of carb. Some manifolds have just one nipple....doesn't matter either way, just cap off unused ones.

04-02-2016, 08:04 AM	#2
rks Join Date: Dec 2013 Location: Western New York Posts: 454	1. Part of emission control system. A lot of folks remove this stuff, then make and attach a block off plate to the opening. There are part suppliers that sell these plates, but they are easy enough to make. 2. Vacuum ports are there to operate fuel petcock/pump, and the ACV/anti backfire valve on the right side of carb. Some manifolds have just one nipple....doesn't matter either way, just cap off unused ones. __________________ 2011 Jonway 150cc..16,109 breakdown free miles, and counting
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