RE: down pipes

Yamaha YZF 1000 Thunderace discussion forum:


RE: down pipes

RE: down pipes 
Geert said 2008-06-09 06:55 
 
I was riding for 3 weeks that way when i was searching for a new one.
The powervalve reduce the hole of the exhoust between 0 ant 3000rpm, once you are past that the valve is almost completely open.
But to start riding you need more gas, you have more noise from the exhoust, but most of all the bike accelerate slow ´especially between 1500 and 2500rpm.
Also in the city the bike uses more gas becouse the fuel goes not down in the cylinder, but direct from the intake to the exhoust, sometimes with explosions in the exhoust.
That is coused by the angle of the valves, combined with the long overlap time (means the valve to the exhoust is a long time open, while at the same time the intake is open too.
You need that powervalve. 
 
<<Previous          Answer          Discussion overview          Report spam          Next>>

Comments, questions and answersEnter a comment or answer to this message

You can post your question, answer or comment as a guest. Or enter your e-mail to join the forum and get notifcations of new messages.

 
Title 		 
Signature
Optional e-mail
Enter your e-mail to join the forum and get notification of answers and new messages. You can unsubscribe with a single click. Bikez does not display, sell or misuse e-mail addresses.
Message text

Describe technical issues in detail to get quality answers. You can offer or request second-hand parts and equipment as a privat person. Bikez reserves the right to remove any improper or commercial content.
Accept that we store and display the message.