40mm intakes

crassius

Well-Known Member
Sep 30, 2012
4,032
155
63
USA
Been using motors with 40mm intakes for a while now. Have them with aluminum intakes, but ordered some steel ones for spares. I'm finding that on a tight frame build, the carb often won't fit in the frame.

I've found some steel intakes that give about an inch of extra room when needed.

ON left side in pic below.

ACMD0016.jpg ACMD0017.jpg ACMD0018.jpg
 

crassius

Well-Known Member
Sep 30, 2012
4,032
155
63
USA
got them from BGF, but he looked thru his shelves and has no more of the short ones : (

may take a while to find someone that still has them
 

CroMagnum

Member
Sep 2, 2011
148
1
16
Los Angeles
got them from BGF, but he looked thru his shelves and has no more of the short ones : (

may take a while to find someone that still has them

Are these the same?
http://www.ebay.com/itm/Intake-Mani...cc-W-Racing-Port-Matched-Gasket-/322213580185

I also found some cast aluminum that appear to be short. Make that rough cast... ;)
http://www.ebay.com/itm/Alum-Air-Intake-Pipe-40mm-Bicycle-Motors-Bicycle-Engine-Kits-/192211108245


Of course, you could always go dual carbs.
http://www.ebay.com/itm/Dual-Air-In...0CC-Engine-Gas-Motorized-Bicycle/252520204306
 

crassius

Well-Known Member
Sep 30, 2012
4,032
155
63
USA
steel onesnot same - says 32mm right on the ad

aluminum ones appear to be the long ones that come with the motors

the short, steel 40mm ones have a small round opening at the mounting point