advice on shortening two stroke intake?

M

motor_bike_fanatic

New Member
I have heard some people suggest that a straight intake improves port matching. so if I cut the intake where it is angled, will that improve low end power and torque for better hill climbing ability?
 
I have a MM shorty manifold, and I can't tell if by itself it makes more power, but I can tell it doesn't make any less.
 
In a general, long, gently curving intakes boost low end power while short intakes boost higher end power. There are exceptions to every rule.
One of the better ways to boost low end power in a two stroke is to add a reed valve to the intake. You will need to adapt one from another small engine like a chain saw.
 
A reed valve is little more than a check valve. It allows things to flow only in one direction. To my understanding, reed valve prevents spent exhaust gases from contaminating the fuel/air mixture from the carb.
I bought a reed for a chainsaw from ebay for around $10. I am working on building a housing from aluminum stock.
 
wheelbender6 said:
A reed valve is little more than a check valve. It allows things to flow only in one direction. To my understanding, reed valve prevents spent exhaust gases from contaminating the fuel/air mixture from the carb.
I bought a reed for a chainsaw from ebay for around $10. I am working on building a housing from aluminum stock.
Click to expand...

a reed valve gos between the carb and cylinder and block air fuel load from exiting the motor HT are piston port blocking so with a reed you MUST cut or drill a pass through in the skirt of the piston and yes they work vary well I had a hard time sealing mine a stack of aluminum plates tried paper, rubber and 2 part epoxy what worked for me? leather
 
Last edited:
You must log in or register to reply here.
Back
Top