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Windscreen and buffering

Started by tory, February 28, 2016, 05:40:58 PM

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Nova

Quote from: Arnie on February 28, 2016, 06:00:07 PM
It has been a common question, but there is no common answer.
There have been a number of differing aftermarket screens tried by people, but I have not seen any individual preference standout.

My choice for my '91 (same model as your 92) was to make an extension that uses the "slot" between the fins on my OEM screen to help push the air up and over.  Unfortunately, this "slot" or "letterbox" windscreen seems to not be available in the US.

Cheers (from an ex-Michigander)
Arnie

The "letterbox" windscreen was not available in the US AFAIK. It seems to have been mainly limited to Australia and Japan. I managed to find one and have it shipped to the states from Japan. I'm just waiting for the weather to get better so I can see how well it deflects the air for me.

Sparky84

Quote from: Pat Conlon on February 28, 2016, 08:29:10 PM

Low screen providing clean air with a quiet helmet and custom ear plugs works best for me.

My 84 has standard screen and I have buffering not that it worries me too much, a few are commenting on Clean Air,

Brings me to my Problem, Helmet Noise or should I say BUZZ!!!
If I stand up while riding in a Lot of wind, helmet is quiet but whilst sitting in normal Position I get a Low BUZZ, I do wear ear plugs but you can still hear a constant Annoying BUZZ in the background.
Opening Visor quietens it down only because there is a lot of wind noise.

I don't know if it is due to the new Helmet being Very quiet that I can now hear it.

Would the buffering be vibrating my helmet to produce this BUZZ?
Does anybody else have this problem?

Cheers Alan
1984 FJ1100
1979 Kawasaki Z1300
1972 Honda CB750/4 K2

tory

Thank you for all the advice. I suppose I did leave out the details.
I am 5.9, I have a stock shield, bar risers and a Corbin seat. I also have a Scala rider which was s where the buffeting becomes the biggest issue.
I do not mind the shorter stock shield and do not want to "hide" behind it. Just that this is the noisiest bike I've ever owned wind turbulence wise.
  I have considered a Laminar lip or F1 but would like to know if they helped.

I am.most curious now about the "letter slot" shield. I have had other bikes in n the past with similar designs and they worked excellent eliminating negative air.  Any one know how to find one for the late FJs here in the States?
1992 FJ1200
1982 CB900F
1989 EX500 NINJA
1978 CB400 HAWK

tory

Has anyone ever tried cutting a slot in there stock shield? I have heard, with other bikes, that this eliminates the negative air helping buffeting.
1992 FJ1200
1982 CB900F
1989 EX500 NINJA
1978 CB400 HAWK

FJmonkey

Quote from: tory on March 02, 2016, 08:57:04 AM
Has anyone ever tried cutting a slot in there stock shield? I have heard, with other bikes, that this eliminates the negative air helping buffeting.

Yes, Skymasters cut a hole in his screen. Not sure of the end result. Bit of a Franken bike last I saw...
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

Pat Conlon

Yea, where is Mike? He has been quiet lately.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

FJmonkey

Quote from: Pat Conlon on March 02, 2016, 09:32:17 AM
Yea, where is Mike? He has been quiet lately.
Busy moving to Florida, renting out his house here in SoCal.
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

FJscott

Quote from: FJmonkey on March 02, 2016, 09:58:21 AM
Quote from: Pat Conlon on March 02, 2016, 09:32:17 AM
Yea, where is Mike? He has been quiet lately.
Busy moving to Florida, renting out his house here in SoCal.

Which Mike is moving to Florida, LA or Skymasters? another FJ Brother to ride with...Im stoked. let me know which Mike so I can PM him.
would be great to have another attendee at Boone...#booneissoon!

Scott

FJmonkey

Quote from: FJscott on March 02, 2016, 11:19:26 AM
Busy moving to Florida, renting out his house here in SoCal.

Which Mike is moving to Florida, LA or Skymasters? another FJ Brother to ride with...Im stoked. let me know which Mike so I can PM him.
would be great to have another attendee at Boone...#booneissoon!

Scott
[/quote]

Sykmasteres
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

tory

Quote from: FJmonkey on March 02, 2016, 09:22:59 AM
Quote from: tory on March 02, 2016, 08:57:04 AM
Has anyone ever tried cutting a slot in there stock shield? I have heard, with other bikes, that this eliminates the negative air helping buffeting.

Yes, Skymasters cut a hole in his screen. Not sure of the end result. Bit of a Franken bike last I saw...

Would love to see/hear how that went. Is there a post on it?
1992 FJ1200
1982 CB900F
1989 EX500 NINJA
1978 CB400 HAWK

FJmonkey

Quote from: tory on March 02, 2016, 01:45:44 PM
Yes, Skymasters cut a hole in his screen. Not sure of the end result. Bit of a Franken bike last I saw...
Would love to see/hear how that went. Is there a post on it?
Here it is, scroll down till just below the video, about 1/3 of the way.

http://www.fjowners.com/index.php?topic=7691.msg115581#msg115581
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

Pat Conlon

Quote from: Sparky84 on March 02, 2016, 01:31:44 AM
Quote from: Pat Conlon on February 28, 2016, 08:29:10 PM

Low screen providing clean air with a quiet helmet and custom ear plugs works best for me.

My 84 has standard screen and I have buffering not that it worries me too much, a few are commenting on Clean Air,

Brings me to my Problem, Helmet Noise or should I say BUZZ!!!
If I stand up while riding in a Lot of wind, helmet is quiet but whilst sitting in normal Position I get a Low BUZZ, I do wear ear plugs but you can still hear a constant Annoying BUZZ in the background.
Opening Visor quietens it down only because there is a lot of wind noise.

I don't know if it is due to the new Helmet being Very quiet that I can now hear it.

Would the buffering be vibrating my helmet to produce this BUZZ?
Does anybody else have this problem?

Cheers Alan


Hey Alan, sorry I missed this post.
Like I said, a good helmet, a neck gater (to seal the lower opening of the helmet) and custom ear plugs is about all I can do gear wise...

Yep, I also have the stock windscreen on my '84. Want to hear something strange?
I replaced the oem Mickey Mouse ear mirrors (bar mount) with some sexy Italian Rizoma mirrors and most of the helmet rumble went away. The Rizoma mirrors mount lower and further outside than the oem barn doors.
My theory is that I was getting turbulence off the big oem mirrors and that was hitting me right in the helmet.
Kinda like vortices coming off the tip of an airplane wing.

The lower, wider Rizoma mirrors moved the tumbling air away from my helmet.

Just a theory, but the results are unmistakable.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

tory

Thank you for the link FJmonkey. I am curious how that worked out in the end.
  He mentioned a CBR shield could be made to work??? Who can tell me more about that! It would be great to find a used one to play with.
1992 FJ1200
1982 CB900F
1989 EX500 NINJA
1978 CB400 HAWK

aviationfred

Quote from: tory on March 02, 2016, 03:46:23 PM
Thank you for the link FJmonkey. I am curious how that worked out in the end.
 He mentioned a CBR shield could be made to work??? Who can tell me more about that! It would be great to find a used one to play with.


The CBR1100xx windscreen mod has only been proven to work on the '88-'90 models.

Fred
I'm not the fastest FJ rider, I am 'half-fast', the fastest slow guy....

Current
2023 Moto Morini X-Cape 650
2008 VFR800 RC46 Vtec
1996 VFR750 RC36/2
1990 FJ1200 (1297cc) Casper
1990 VFR750 RC36/1 Minnie
1989 FJ1200 Streetfighter
1985 VF500F RC31 Interceptor

Vilike

I have a brand new MRA one, but that is the stock size. When i bought my FJ, there was a Givi touring windscreen on the bike, that was perfect for me. Im 183 cm tall.

  :yes:

FJ1200 1TX '1986
FJ1200 3CW '1988
FZR1000 Exup 3LE '1991