Thread: intake riser pros/cons?
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Old 07-29-2016, 11:35 AM   #4
Irish   Irish is offline
 
Join Date: Dec 2014
Posts: 738
I have "ported & polished " intake manifolds on motorcycles(Triumphs) but have never worked on that type of eng! I did it to help RPM in drag racing but I doubt if your going to Drag Race a scooter! Sorry can't help! Irish
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