Author Topic: 400/4 carb balancing  (Read 316 times)

Offline THUNDERDOWNUNDER

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400/4 carb balancing
« on: May 21, 2020, 03:36:21 PM »
Think they need a balance . Sluggish takeoff then whoosh! Anyone know a good brand of vac gauges or ones  to avoid ? Thanks in advance!

Offline Bryanj

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Re: 400/4 carb balancing
« Reply #1 on: May 21, 2020, 04:30:52 PM »
If you want ones that work get Sealy, come with adaptors and pipe plus good gauges BUT over £100
The cheaper blue metal ones dont damp well, ive had both

Offline taysidedragon

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Re: 400/4 carb balancing
« Reply #2 on: May 21, 2020, 06:01:27 PM »
Or look for Morgan Carbtune, also cost a bit but reliable.
Gareth

2010 Street TripleR
1977 CB400F

Offline Bryanj

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Re: 400/4 carb balancing
« Reply #3 on: May 21, 2020, 07:34:37 PM »
Ebay 301337733424 are the ones i bought, there are £46ish sets on ebay from china BUT look at the dials closley they are utter crap.
These are the nearest to original Honda i have found and having done the job for as long as i have they are worth it, the others you may as well burn your cash

Offline Oddjob

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Re: 400/4 carb balancing
« Reply #4 on: May 21, 2020, 10:48:37 PM »
Ebay 301337733424 are the ones i bought, there are £46ish sets on ebay from china BUT look at the dials closley they are utter crap.
These are the nearest to original Honda i have found and having done the job for as long as i have they are worth it, the others you may as well burn your cash

Same as the ones I bought last year Bryan, bought mine from the USA for around £80 IIRC, they also reminded me of the genuine Honda gauges  ;D ;D
Don't play stupid with me, I'm better at it

Offline Andych

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Re: 400/4 carb balancing
« Reply #5 on: May 22, 2020, 12:18:22 AM »
You could also go all high tech with this item from Australia... a bit more expensive but it is a quality product.
https://raytechautomotive.com/collections/frontpage/products/synchroking-4s-mkii
1975 CB400 - Project
1978 Yamaha SRX250 - Project

Offline gtmdriver

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Re: 400/4 carb balancing
« Reply #6 on: May 22, 2020, 08:10:54 AM »
I bought a cheapie set but I checked the calibration and, surprisingly, they were spot on.

Offline Bryanj

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Re: 400/4 carb balancing
« Reply #7 on: May 22, 2020, 08:39:55 AM »
I found the cheap set just didnt move tight when you screwed the little plastic damper down to stop the bounce, its those bits that are the real bad part the sealey one have the rotary thumbscrew dampers like the Honda.
I also paid less than £100 for mine on a "special" from e bay

Offline Oddjob

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Re: 400/4 carb balancing
« Reply #8 on: May 22, 2020, 05:56:04 PM »
My brother bought me a set of Davida gauges around 30 years ago as payment for fixing his bike, they worked ok for a few times but the damping on them was done by the same things you use on fish tank air lines. the needles either bounced around all over the place or wouldn't move due to too much damping. One gauge then just stuck solid for no reason, I had to use 3 gauges and swap onto the 4th cylinder to check what is was running at. Threw them away in the end.
« Last Edit: May 22, 2020, 06:19:07 PM by Oddjob »
Don't play stupid with me, I'm better at it

Offline Bryanj

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Re: 400/4 carb balancing
« Reply #9 on: May 22, 2020, 06:07:51 PM »
Thats the cheap ones i was on about, sold mine for a tenner at an autojumble

Offline flatfour

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Re: 400/4 carb balancing
« Reply #10 on: May 23, 2020, 09:30:04 AM »
Perhaps it's just the luck of the draw - my Davida set of gauges are over 20 years old now, used a couple of times each year and have been faultless.

Offline 4wDaz

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Re: 400/4 carb balancing
« Reply #11 on: May 23, 2020, 09:49:56 AM »
Anyone used the Morgan Carbtune ?

Offline taysidedragon

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Re: 400/4 carb balancing
« Reply #12 on: May 23, 2020, 10:17:40 AM »
Anyone used the Morgan Carbtune ?

Yep. Easy to use and good quality. My local club has a tool loan scheme so I just borrow it when I need it.
If I used it more I would buy one.
Gareth

2010 Street TripleR
1977 CB400F

Offline 4wDaz

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Re: 400/4 carb balancing
« Reply #13 on: May 23, 2020, 02:04:14 PM »
I think i may have to invest in a set  :)

 

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