[Honda Hawk newbie]

I recently put in a carb rebuilder kit In my CB 400 Hawk After tinkering with the Jets I found that giving it throttle at low rpm's It would seem to run to lean The guy at the Honda shop said he never seen Pilot jet or (slow) jet like mine Can someone help me Find bigger pilot Jets? I'm going to try to post a picture so you can see what they look like

 

[J-T]

First off welcome to the group. We'd appreciate a post in the member introductions section to let us know a bit about yourself and your bike(s). It would be helpful if you would include your location in your profile and create a signature that includes the specific model of your bike.

Don't know what you mean by "tinkering with the jets". Most likely your slow jet is non-removable and, unless it's dirty/plugged it's probably not the cause of your problems. If you browse the SOHC fuel supply and carburetion section you'll find a wealth of information. With that knowledge we'll be better able to help you back on the road. Here's a good place to start.

http://www.hondatwins.net/forums/63-fuel-supply-carburation/24191-rebuilding-vbulletin-carbs.html

 

[longdistancerider]

The slow jet isn't removable if you have the correct carbs, VB21's. It was pressed into place and tapping on the end of it to remove it destroys it. VB22's have a removable jet.
The only way I've heard of to remove it is using a screw extractor but that will cause damage to the inner bore which then has to be cleaned up to function again. Never tried this,

 

[dtsmjr8dan]

Welcome to the forum. Great to see another 400 series on here.

 

[Honda Hawk newbie]

this is what i removed, a jet threads in behind it and these needles thread up in to the air way of the carb. i think if i can replace these with some that have a bigger opening for more gas flow.

 

[longdistancerider]

Those are the primary emulsion tubes, not the slow jet. This what the slow jet looks like Honda 450 CB450SC main jet slow air pilot kit but on the VB21's they are pressed in place

 

[Honda Hawk newbie]

Oh ok , So if my bike is running lean When I rev it from low rpm's What would you suggest doing?

 

[longdistancerider]

Start by identifying your carbs here http://www.hondatwins.net/forums/63...1654-carb-information-years-jetting-more.html which tells you the stock jetting and compare that to what you're running.
These carbs were setup originally on the lean side and we've found they benefit from having a 1 size increase in the primary main jet
A lean condition can be from air cut valves leaking, leaking carb insulators/boots or plugged passages in the carbs
After you rebuilt them did you sync them and then set the mixtures correctly?
Are you trying to run w/o the air box boots in place?
Correct sparkplugs? Valves adjusted? Compression in spec?

 

[Honda Hawk newbie]

I didn't sync the carburetors yet , I'm running them with the air box boots in place , I have the right spark plugs , The bike has Good compression Cause in certain rev ranges it has good power. Thanks for your comments! It helps alot!!

 

[longdistancerider]

In order to get mixtures correct the carbs have to be sync'd first

 

[seaTWiNer]

View attachment 35400 this is what i removed, a jet threads in behind it and these needles thread up in to the air way of the carb. i think if i can replace these with some that have a bigger opening for more gas flow.

hey hawk newbie, where did u source those 2 shiny new primary emulsion tubes??? I'm in desperate need of 2 of them for my 78... also, u still have those older ones??? I can't find any anywhere...