Author Topic: 4into1Motorcycleparts Carb Kits?  (Read 579 times)

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Offline Duanob

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4into1Motorcycleparts Carb Kits?
« on: July 03, 2024, 11:37:58 AM »
Anybody tried them for the CB550K carbs? Any good? Any Bad? I bought them mostly to get a complete o-ring and gasket set. I may try the floats and jets if mine are gas logged. I know my float jets have some gunk, so new ones will only help. Any thoughts appreciated.
"Just because you flush a boatload of money down the toilet, doesn't make the toilet worth more",  My Stepfather the Unknown Poet

1974 CB360T
1976 CB550K2 Resurrected
1976 CB550F2 Barn Find
1979 CX500 VG "HONDA-GUZZI"
2007 Moto Guzzi Breva 750ie
2015 BMW F700GS
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Offline Ksgfx

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #1 on: July 03, 2024, 11:54:23 AM »
I have tried them and would not recommend using any of the jets that come in the kit. Unless yours are corroded beyond use you are better off cleaning and using the OEM ones. The newer ones, especially from 4into1 just don't have the size accuracy that the OEM ones do causing lots of tuning issues.

Hope that helps.

kev
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72 CB500 K2
70 CL350 K2
72 CB450 K5
73 CB450 K6
75 CB750 F0

Offline PeWe

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #2 on: July 03, 2024, 11:58:59 AM »
I have tried their pilot jets for CB750 round top carbs. 2 of them broke when tighten them. Had to drill out the brass debris.

Found a review saying the same thing, broken pilot jets.

I think CB500 pilots are of same design, CB550 I do not know.

The general consensus is to use stock brass jets, needles, not aftermarket.
Better to clean the old jets.

Main jet is normally the only jet to change if the setup need more fuel after exhaust system change or better flowing filtering system.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
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The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
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http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Bankerdanny

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #3 on: July 03, 2024, 12:27:20 PM »
I've used them, but for gaskets only. Last time I had a kit, which was a few years ago, I compared the OEM float needle to the kit, and the kit needle was visibly shorter and would have made it very hard to set the floats.
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Offline Duanob

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #4 on: July 03, 2024, 12:49:20 PM »
Thanks all! I have some jets coming from JetRus as far as pilots and mains. I may have to try and sonic clean the float jets and needles. At least oi have all the o-rings and gaskets.
"Just because you flush a boatload of money down the toilet, doesn't make the toilet worth more",  My Stepfather the Unknown Poet

1974 CB360T
1976 CB550K2 Resurrected
1976 CB550F2 Barn Find
1979 CX500 VG "HONDA-GUZZI"
2007 Moto Guzzi Breva 750ie
2015 BMW F700GS
Another 1976 CB550K Cafe?

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Offline fizzlebottom

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #5 on: July 03, 2024, 01:29:58 PM »
I tried their floats in my CB650 once. Never again. Failed within a season. Went back to my 42 year old floats and everything is great.
1982 CB650SC Nighthawk

Offline Duanob

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #6 on: July 03, 2024, 06:11:06 PM »
I used all the gaskets and O-rings I needed. I checked out the floats, didn't like the steel pin, would rather use the brass OEM. My floats seemed to be fine. I did like the bowl gasket, perfect fit, no futzing with the non shaped ones again.
 
I was almost tempted to install the entire kit and write up a proper review on these carb kits that people could use but I just want to get this this running for now. I can always do that later if I'm feeling a bit masochistic! 😀
"Just because you flush a boatload of money down the toilet, doesn't make the toilet worth more",  My Stepfather the Unknown Poet

1974 CB360T
1976 CB550K2 Resurrected
1976 CB550F2 Barn Find
1979 CX500 VG "HONDA-GUZZI"
2007 Moto Guzzi Breva 750ie
2015 BMW F700GS
Another 1976 CB550K Cafe?

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Offline CycleRanger

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #7 on: July 03, 2024, 08:05:51 PM »
I used these kits on my 550K.
Just the gaskets etc., no brass.
No issues.
Same for my CJ360T and CL350.
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline ofreen

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #8 on: July 03, 2024, 09:58:30 PM »
I don't know about those kits, but I have gotten other kits in the past.  Like others mentioned, I found the brass bits so far out of spec as to be useless.  I thought the same thing, I'll just use the rubber stuff.  I found that the rubber is poor quality, shrinking and hardening in a comparatively short time.  So that was a bust too.  So as long as OEM is available, I get that.  Buy once and cry once as they say.
Greg
'75 CB750F

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Offline bryanj

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #9 on: July 03, 2024, 11:59:24 PM »
If you just wany O rings ask nurse julie on here,she will ship toUS
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

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Offline Stev-o

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #10 on: July 05, 2024, 09:45:04 AM »
If you just wany O rings ask nurse julie on here,she will ship toUS

Yes, she sells the viton rubber bits that resist the effects of ethanol
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline madmtnmotors

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #11 on: July 05, 2024, 12:08:19 PM »
If you just wany O rings ask nurse julie on here,she will ship toUS

Yes, she sells the viton rubber bits that resist the effects of ethanol

That was going to be my two cents: verify that the rubber bits are Viton rubber. I have had aftermarket kits with rubber bits that swelled beyond recognition and started leaking within a week of exposure to ethanol laced fuel. Leaving puddles of gasoline under the bike while stopped at a light from the marginal rubber tips on the float needles had me skirting with an impression of "Ghost Rider". My best performing carb packing has come in the form of genuine Honda kits. K&L float needles are a close second.
TAMTF...


Wilbur



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Offline newday777

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #12 on: July 05, 2024, 06:17:57 PM »
If you just wany O rings ask nurse julie on here,she will ship toUS

Yes, she sells the viton rubber bits that resist the effects of ethanol

That was going to be my two cents: verify that the rubber bits are Viton rubber. I have had aftermarket kits with rubber bits that swelled beyond recognition and started leaking within a week of exposure to ethanol laced fuel. Leaving puddles of gasoline under the bike while stopped at a light from the marginal rubber tips on the float needles had me skirting with an impression of "Ghost Rider". My best performing carb packing has come in the form of genuine Honda kits. K&L float needles are a close second.
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline Duanob

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Re: 4into1Motorcycleparts Carb Kits?
« Reply #13 on: July 05, 2024, 09:36:47 PM »
Luckily my carbs don't have robber tips on the float needles. And also luckily, I have a few places close by that sell non -cornholio gas! I buy it regularly for any engine that is old or stored for a any length of time.
"Just because you flush a boatload of money down the toilet, doesn't make the toilet worth more",  My Stepfather the Unknown Poet

1974 CB360T
1976 CB550K2 Resurrected
1976 CB550F2 Barn Find
1979 CX500 VG "HONDA-GUZZI"
2007 Moto Guzzi Breva 750ie
2015 BMW F700GS
Another 1976 CB550K Cafe?

  __o
_- \_<,
(*) /' (*)