mmz77

Member
Oct 15, 2006
435
0
Just got a quick question. I was wondering if the older bikes that didn't have power valves would still have a power band like the newer two strokes that do. I am just curious.

P.S. Scared the crap out of me today when I hit the power band from a patch of grass to dirt and the front wheel shot up :boss: . I guess I have to get used to this lol.
 

76GMC1500

Uhhh...
Oct 19, 2006
2,142
1
Yes, the power band just the range at which the ports and expansion chamber operate most efficiently at. A power valve broadens the power band. Power valves can actually tame the hit.
 

84cr125

Member
Apr 8, 2007
292
0
ya the older bikes do have a powernd. i should know, cuz i have one. Once she hits, she hits hard and fast.

Ive got one of Hondas first Power Valves, they called it the ATAC.(Automatic Torque Amplification Chamber). it was built to help the woes in the bottom end and also help the transition throughout the rpm range without harming the top end power.
 

76GMC1500

Uhhh...
Oct 19, 2006
2,142
1
Definately with. It lets you run more aggresive porting for more peak horsepower, but still have a broad and useable power band. Power valves also tame the hit down to give you better control.
 

MikeT

~SPONSOR~
Jan 17, 2001
4,110
11
Very good answers guys. I can't add anything else.
 
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