Technical Discussion Topics related to Technical Issues

New Carb Boots Different!!!!

Old 07-21-2011, 08:09 AM
  #1  
Junior Member
Squid
Thread Starter
 
Join Date: Jul 2011
Location: nor cal
Posts: 21
chp_hates_me is on a distinguished road
New Carb Boots Different!!!!

i just bought some new carb boots for my 98 model. the boots are different than the originals.

take a look at the attached pic.... is this insert molded metal plate there help the hiccup problem, better atomize the fuel, reduce HP, etc????

.......i really don't like the looks of this, the plate ID is less than the ID of the carb outlet.....should i chuck this thing up and bore it out to 48.5 mm, same as the carb outlet.

the honda engineers must have done this for a reason, but it does not mean that it was a good reason.

thanks
Attached Thumbnails New Carb Boots Different!!!!-carb_boots.jpg  
chp_hates_me is offline  
Old 07-21-2011, 08:57 AM
  #2  
Senior Member
SuperBike
 
killer5280's Avatar
 
Join Date: Aug 2004
Location: Atlanta, GA
Posts: 1,728
killer5280 is on a distinguished road
That was a "feature" on some Euro models of the Super Hawk. Sort of a minor restrictor plate. They don't make too much difference, but they are easily removed.

https://www.superhawkforum.com/forum...trictor-20852/
killer5280 is offline  
Old 07-21-2011, 09:07 AM
  #3  
Junior Member
Squid
Thread Starter
 
Join Date: Jul 2011
Location: nor cal
Posts: 21
chp_hates_me is on a distinguished road
mine is a california model.

i read here that the euro restriction plates are D shaped. i'm just a little hesitant to take them out b/c i also read here the plates are to help with the hiccup problem and low velocity atomization that leads to the off idle engine dying prob.
chp_hates_me is offline  
Old 07-21-2011, 10:24 AM
  #4  
Banned
MotoGP
 
Join Date: Aug 2007
Location: Lake View Terrace, CA
Posts: 5,942
8541Hawk will become famous soon enough
Well it's not the "restrictor" as mentioned in the other post as those were much bigger.

I have run them both ways and found the only difference is the carbs seat much better when they are left in.

So I would just leave them in there and run them the way they are.
8541Hawk is offline  
Old 07-21-2011, 11:42 AM
  #5  
Senior Member
MotoGP
 
Join Date: May 2008
Location: San Clemente, CA
Posts: 3,447
VTRsurfer is on a distinguished road
I'd have to remove my carbs to check for sure (and I'm not going to do that right now), but I've had mine off 4 times, and I don't recall seeing a metal plate. I would swear that mine look like the cutaway in the upper image you attached. I've looked down into the intake ports with a flashlight each time I've had them off.

And as you can see in my signature, mine is an '05. Are they OEM Honda boots?
VTRsurfer is offline  
Old 07-21-2011, 11:50 AM
  #6  
Senior Member
SuperSport
 
kai ju's Avatar
 
Join Date: Jun 2005
Posts: 523
kai ju is an unknown quantity at this point
Originally Posted by chp_hates_me View Post
i just bought some new carb boots for my 98 model. the boots are different than the originals.

take a look at the attached pic.... is this insert molded metal plate there help the hiccup problem, better atomize the fuel, reduce HP, etc????

.......i really don't like the looks of this, the plate ID is less than the ID of the carb outlet.....should i chuck this thing up and bore it out to 48.5 mm, same as the carb outlet.

the honda engineers must have done this for a reason, but it does not mean that it was a good reason.

thanks
Leave the restrictor alone, you will get better low rpm fuel metering because the smaller diameter maintains higher intake port velocity.
You will not feel or see a difference at high rpm.
kai ju is offline  
Old 07-21-2011, 12:05 PM
  #7  
Junior Member
Squid
Thread Starter
 
Join Date: Jul 2011
Location: nor cal
Posts: 21
chp_hates_me is on a distinguished road
yes they are OEM pn#s

16210-MBB-950 - INSULATOR, FR. CARBURETOR
16220-MBB-950 - INSULATOR, RR. CARBURETOR
chp_hates_me is offline  
Old 07-21-2011, 02:36 PM
  #8  
Banned
MotoGP
 
Join Date: Aug 2007
Location: Lake View Terrace, CA
Posts: 5,942
8541Hawk will become famous soon enough
Originally Posted by VTRsurfer View Post
I'd have to remove my carbs to check for sure (and I'm not going to do that right now), but I've had mine off 4 times, and I don't recall seeing a metal plate. I would swear that mine look like the cutaway in the upper image you attached. I've looked down into the intake ports with a flashlight each time I've had them off.

And as you can see in my signature, mine is an '05. Are they OEM Honda boots?
Yes they are stock and you can't see them if you look down the carbs which is another good sign to just leave them be.......
8541Hawk is offline  
Old 07-21-2011, 02:50 PM
  #9  
Junior Member
Squid
Thread Starter
 
Join Date: Jul 2011
Location: nor cal
Posts: 21
chp_hates_me is on a distinguished road
ok, thanks for all the good advice guys.

i'll have it put together before dark tonight, and then take it out for a good flogging! just before dark is a good time to ride........ i think that is about shift change time for the cops.
chp_hates_me is offline  
Old 07-21-2011, 04:05 PM
  #10  
Out of my mind, back in 5
MotoGP
 
Tweety's Avatar
 
Join Date: Nov 2006
Location: Skurup, Sweden
Posts: 6,109
Tweety is on a distinguished road
The Euro "restrictor" is the same metal piece with about a quarter of the area filled in making a big "D" shaped hole that is easily visible... The restrictor should be removed, the ring is an entirely other matter and should be left alone...
Tweety is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
B R
Classifieds
2
03-25-2010 12:19 PM
Rollin20z
Classifieds
1
01-18-2009 07:55 PM
nophr
Rider's Gear
2
09-17-2006 07:25 AM
altosuperhawk
General Discussion
16
06-19-2006 08:17 PM
jschmidt
Knowledge Base
5
10-16-2005 10:59 PM


Thread Tools
Search this Thread
Quick Reply: New Carb Boots Different!!!!


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.