Topic: Are the Randakk carb rebuild kits genuine Keihin jets?

[zabzob]

That's the question. I've got a 1975 CB750K. I see the Keihin jets are available separately but a kit is more convenient.

[PeWe]

You do not need new jets or needles unless you have damaged them.
Main jet if air filter and/or exhaust system are changed to better flowing in need of a size or 2 bigger.

My K6 carbs had over 100.000 km. Only main jet changed.
If engine runs uneven, carbs need  a deep clean in an ultrasonic cleaner.

[newday777]

Randakks was sold by Randall to one of the dotcom groups a few years ago.  Do not assume anything. Aftermarket kits are only good for the gaskets at best. Never assume the brass parts are worth using. Only get Honda brass parts. Sorry but there are no good aftermarket kits that include the brass and Honda never included the brass in the gasket set. If you need jets, get Keihin jets from JetsRUs.com

[Floshenbarnical]

I agree, through experience this summer.

Rejetted my pilot and main (K&N pods & open 4:1 exhaust w/ PD carbs) from #35 & #105 to #40 and #120. The math said it would work, I was using jets from a kit. It did not work. Replaced with #40 and #120 OEM Keihin jets from ToysRUs JetsRUs and it immediately ran like a top

[Tracksnblades1]

I agree, through experience this summer.

Rejetted my pilot and main (K&N pods & open 4:1 exhaust w/ PD carbs) from #35 & #105 to #40 and #120. The math said it would work, I was using jets from a kit. It did not work. Replaced with #40 and #120 OEM Keihin jets from ToysRUs JetsRUs and it immediately ran like a top

Have you had an A/F test done ?

[Flyin900]

Randakks was sold by Randall to one of the dotcom groups a few years ago.  Do not assume anything. Aftermarket kits are only good for the gaskets at best. Never assume the brass parts are worth using. Only get Honda brass parts. Sorry but there are no kits that include the brass.

As noted above Randall sold the business a number of years ago to a conglomerate and is no longer involved in the business of parts under his name. When he was involved he only sold the soft parts for kits AFAIK and no brass in his kits. He was a big believer in keeping and cleaning the original Keihin brass in the carb setup.
The general consensus is that aftermarket brass is never as good as the original stuff. That said, if your highly modifying the original Honda stuff with intake air box and motor/exhaust setup changes you will need to experiment for the best results.

[grcamna2]

Randakks was sold by Randall to one of the dotcom groups a few years ago.  Do not assume anything. Aftermarket kits are only good for the gaskets at best. Never assume the brass parts are worth using. Only get Honda brass parts. Sorry but there are no kits that include the brass.

As noted above Randall sold the business a number of years ago to a conglomerate and is no longer involved in the business of parts under his name. When he was involved he only sold the soft parts for kits AFAIK and no brass in his kits. He was a big believer in keeping and cleaning the original Keihin brass in the carb setup.
The general consensus is that aftermarket brass is never as good as the original stuff. That said, if your highly modifying the original Honda stuff with intake air box and motor/exhaust setup changes you will need to experiment for the best results.

I appreciate this information.

[zabzob]

Thanks all, good to know. I did at one point have Keyster stuff in my carb, but went back to the original jets. They have the Keihin stamp on them.

Related, I'm curious if anyone has bought the Yamiya rebuild kits? Their individual parts are variously marked Honda or Yamiya.

[WideAWAKE]

Owned by the same people who bought mikes XS which knowingly sells defective parts. Happened with multiple parts on multiple occasions. They are not here to serve a community of vintage bike enthusiasts, they are here to take as much money from you and get away with delivering the lowest quality parts they can without going under.

I personally do everything I can, including spending more money elsewhere, to avoid them.

[Bailgang]

When he was involved he only sold the soft parts for kits AFAIK and no brass in his kits. He was a big believer in keeping and cleaning the original Keihin brass in the carb setup.

Not so sure about that because his Goldwing carb kits were about the most complete carb kits (including new brass) you could get for a GL and the most expensive and the Goldwing owners on the GL site I visited during the time I had mine regarded his kits as being superior to any other aftermarket kits. I can't say whether his brass peaces were genuine Keihin, Randakks was on vacation when I needed kits for my GL and his site wasn't taking orders so I had to settle with a different kit but Randakk held the same esteem on the GL site as our Hondaman does here and he built a reputation for selling quality products. As it's been noted, Randakks has been sold and the big question has been is the quality still at the same level as when he was involved?

[newday777]

When he was involved he only sold the soft parts for kits AFAIK and no brass in his kits. He was a big believer in keeping and cleaning the original Keihin brass in the carb setup.

Not so sure about that because his Goldwing carb kits were about the most complete carb kits (including new brass) you could get for a GL and the most expensive and the Goldwing owners on the GL site I visited during the time I had mine regarded his kits as being superior to any other aftermarket kits. I can't say whether his brass peaces were genuine Keihin, Randakks was on vacation when I needed kits for my GL and his site wasn't taking orders so I had to settle with a different kit but Randakk held the same esteem on the GL site as our Hondaman does here and he built a reputation for selling quality products. As it's been noted, Randakks has been sold and the big question has been is the quality still at the same level as when he was involved?

Randakks never had the brass in the kits, and he highly recommended buying/using original Honda brass from the carbs, and only getting float valves from Honda.  I bought 2 sets for the GL1100 from Randakks.

[Floshenbarnical]

I agree, through experience this summer.

Rejetted my pilot and main (K&N pods & open 4:1 exhaust w/ PD carbs) from #35 & #105 to #40 and #120. The math said it would work, I was using jets from a kit. It did not work. Replaced with #40 and #120 OEM Keihin jets from ToysRUs JetsRUs and it immediately ran like a top

Have you had an A/F test done ?

I chopped plugs a few times following an excellent guide on here. Plugs looked great. No fumbling, hesitation, or flat spots. Rode it all season.

[Stev-o]

You do not need new jets or needles unless you have damaged them.

One needs to confirm the carbs have genuine parts before choosing not to replace them.

Don't bother to ask how I found this out! [years ago]

[PeWe]

You do not need new jets or needles unless you have damaged them.

One needs to confirm the carbs have genuine parts before choosing not to replace them.

Don't bother to ask how I found this out! [years ago]

Good idea!
Carb sets for very small money have been on the market the last years.
I could not resist to buy some.

When I saw the needles I changed my mind. I saw direct without comparing, different taper and lenght.

Pilot jets from 4into1. I had to drill all my 4  086A  K6 carbs after 2 were stuck and broken where it is 2mm.
A 2.0 mm drill cleaned the debris. Drilled all 4 to make them equal just for sure.  A very thin layer of alu followed, maybe more oxide thick layer had to focus on depth. Tape on drill helped.

This when I got an idea to use size 42.5. Tricky to find.
I think CB500 has that size.

[grcamna2]

You do not need new jets or needles unless you have damaged them.

One needs to confirm the carbs have genuine parts before choosing not to replace them.

Don't bother to ask how I found this out! [years ago]

Good idea!
Carb sets for very small money have been on the market the last years.
I could not resist to buy some.

When I saw the needles I changed my mind. I saw direct without comparing, different taper and lenght.

Pilot jets from 4into1. I had to drill all my 4  086A  K6 carbs after 2 were stuck and broken where it is 2mm.
A 2.0 mm drill cleaned the debris. Drilled all 4 to make them equal just for sure.  A very thin layer of alu followed, maybe more oxide thick layer had to focus on depth. Tape on drill helped.

This when I got an idea to use size 42.5. Tricky to find.
I think CB500 has that size.

Excellent 

[gearsoup]

Randakks was sold by Randall to one of the dotcom groups a few years ago.  Do not assume anything. Aftermarket kits are only good for the gaskets at best. Never assume the brass parts are worth using. Only get Honda brass parts. Sorry but there are no kits that include the brass.

Well, wish I had found this thread before I bought their kits. I wasn't planning on using the brass, just the gaskets. Hopefully they're of decent quality..

[newday777]

Randakks was sold by Randall to one of the dotcom groups a few years ago.  Do not assume anything. Aftermarket kits are only good for the gaskets at best. Never assume the brass parts are worth using. Only get Honda brass parts. Sorry but there are no kits that include the brass.

Well, wish I had found this thread before I bought their kits. I wasn't planning on using the brass, just the gaskets. Hopefully they're of decent quality..

So did you use the brass from the kits or just the gaskets?

[gearsoup]

So did you use the brass from the kits or just the gaskets?

Neither, I just ordered the kits a couple days ago, haven't come in

I plan on giving the carbs a long soak in the ultra-sonic and going from there. Plan is to use only Keihin brass if at all needed (or what's in there is not OEM)

[Floshenbarnical]

So did you use the brass from the kits or just the gaskets?

Neither, I just ordered the kits a couple days ago, haven't come in

I plan on giving the carbs a long soak in the ultra-sonic and going from there. Plan is to use only Keihin brass if at all needed (or what's in there is not OEM)

I bought cheap carb gaskets from Amazon and ran them leak-free all season. The floats and needles were #$%*, though, so I'll be forking out the coin for some OEM parts before turning her over again.

[gearsoup]

I bought cheap carb gaskets from Amazon and ran them leak-free all season. The floats and needles were #$%*, though, so I'll be forking out the coin for some OEM parts before turning her over again.

That's good to know. The kit I bought doesn't come with floats or needles, I expect to go OEM for those (unless folks have a better suggestion for a K6)

[newday777]

I bought cheap carb gaskets from Amazon and ran them leak-free all season. The floats and needles were #$%*, though, so I'll be forking out the coin for some OEM parts before turning her over again.

That's good to know. The kit I bought doesn't come with floats or needles, I expect to go OEM for those (unless folks have a better suggestion for a K6)

Only OEM

[newday777]

South Sound Honda usually offers the best prices

https://www.southsoundhonda.com/--xpartsstream#/Honda_Powersports/CB750KA_(76)_750_FOUR%2c_JPN%2c_VIN%23_CB750-2540001_TO_CB750-2575894/CARBURETOR/b3d05c73-22e7-4620-b018-132301d96b6e/2956d6f0-ff36-4614-8698-9bd31eb1e621/y

[Floshenbarnical]

I bought cheap carb gaskets from Amazon and ran them leak-free all season. The floats and needles were #$%*, though, so I'll be forking out the coin for some OEM parts before turning her over again.

That's good to know. The kit I bought doesn't come with floats or needles, I expect to go OEM for those (unless folks have a better suggestion for a K6)

Only OEM

Absolutely! I learned from bitter experience.