Vintage Dirt Bike Q & A

Anything and everything about Vintage Dirt Bikes! After you Register, email nathan@alp-sys.com and let me know so I can activate you.
It is currently Fri Dec 15, 2017 7:34 pm

All times are UTC - 7 hours [ DST ]




Post new topic Reply to topic  [ 8 posts ] 
Author Message
PostPosted: Wed Aug 18, 2004 3:51 pm 
Offline
User avatar

Joined: Mon Jan 26, 2004 10:40 am
Posts: 310
Location: Sacramento, CA
Hey,

Anybody from this forum going to the last 2004 Vintage/PV National at Madera, CA?

J

_________________
#829 The "Factory Novice"

1988 Honda CR250RJ
1983 Honda CR480
1981 Can-Am 250 MX6-B
1979 Honda CR250RZ
1979 Kawasaki KX250 A5
1978 Husky 250CR
1978 Honda CR250R
1977 Yamaha YZ400D
1977 Suzuki RM125B


Top
 Profile  
 
 Post subject:
PostPosted: Thu Aug 19, 2004 9:36 am 
I went last year and was planning on going this year before it was moved. Does anyone have information on just what the noise requirements were at Holister Hills that required the move?


Top
  
 
 Post subject:
PostPosted: Thu Aug 19, 2004 1:42 pm 
Offline
User avatar

Joined: Mon Jan 26, 2004 10:40 am
Posts: 310
Location: Sacramento, CA
I believe there was a legal settlement to be under 99 decibels.

http://www.ahrma.org/northwest/T_HollisterCA.htm

Madera is not as nice as the Hollister area, but I'm still looking forward to attending my first National event! :D The next time I drive past the track I will try to take some photos to share and get some info on the surface and other conditions.

_________________
#829 The "Factory Novice"

1988 Honda CR250RJ
1983 Honda CR480
1981 Can-Am 250 MX6-B
1979 Honda CR250RZ
1979 Kawasaki KX250 A5
1978 Husky 250CR
1978 Honda CR250R
1977 Yamaha YZ400D
1977 Suzuki RM125B


Top
 Profile  
 
 Post subject:
PostPosted: Wed Sep 01, 2004 12:58 pm 
Offline

Joined: Fri Feb 27, 2004 10:20 pm
Posts: 906
Location: San Clemente, CA
http://www.off-road.com/dirtbike/news/2 ... index.html This suggests that you need meet a 101dB limit to ride in the ORV parks whether on a track or not. I assume that some of the vintage bikes sampled could not make this limit.

_________________
Michael Stiles
1979 Honda CR250R Elsinore | 2006 Husqvarna SM510R | 2007 Service Honda CR500R-AF


Top
 Profile  
 
 Post subject:
PostPosted: Wed Sep 01, 2004 9:50 pm 
Offline
User avatar

Joined: Mon Jan 26, 2004 10:40 am
Posts: 310
Location: Sacramento, CA
Michael,

The Hollister Hills GP track 99db limit was the result of a lawsuit. Here is a link with the details:

http://www.parks.ca.gov/pages/712/files/110403.pdf

J

_________________
#829 The "Factory Novice"

1988 Honda CR250RJ
1983 Honda CR480
1981 Can-Am 250 MX6-B
1979 Honda CR250RZ
1979 Kawasaki KX250 A5
1978 Husky 250CR
1978 Honda CR250R
1977 Yamaha YZ400D
1977 Suzuki RM125B


Top
 Profile  
 
 Post subject: 99db levels
PostPosted: Thu Sep 02, 2004 8:18 am 
Offline

Joined: Thu May 06, 2004 6:41 am
Posts: 28
Location: Dearborn, MI
If anyone fiqures out how to make an Elsinore CR250R pass the 99db level tests, I'd love to know how they did it!
Thanks

_________________
Dale E White
1980 CR250R
2002 R1


Top
 Profile  
 
 Post subject:
PostPosted: Thu Sep 02, 2004 4:33 pm 
Offline
User avatar

Joined: Mon Jan 26, 2004 10:40 am
Posts: 310
Location: Sacramento, CA
Maybe a carrot would work? :)

Have you tried the DG replacement aluminum silencer?

J

_________________
#829 The "Factory Novice"

1988 Honda CR250RJ
1983 Honda CR480
1981 Can-Am 250 MX6-B
1979 Honda CR250RZ
1979 Kawasaki KX250 A5
1978 Husky 250CR
1978 Honda CR250R
1977 Yamaha YZ400D
1977 Suzuki RM125B


Top
 Profile  
 
 Post subject:
PostPosted: Fri Sep 03, 2004 8:06 am 
Offline

Joined: Thu May 06, 2004 6:41 am
Posts: 28
Location: Dearborn, MI
I spoke with DG, they won't guarantee a db level. And I'm not going to spend the money for the silencer if they can't tell me what db it's rated at, and they won't take it back if it does not pass the 99db level.
I did make up a prototype silencer and sent it to Jemco to be made out of steel. They did a super nice job of fabing it up for me, for $86.00 including shipping. It tested at 98db. The problem is that I'm not convinced that the 18 or 19 year old young man running the sound meter knew what he was doing. I don't trust his results, so I'm going to have one of our production tooling manufactures test it for me. I'm on his list of things to do. I'll post the results when I get it tested.

_________________
Dale E White
1980 CR250R
2002 R1


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC - 7 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group