Jim Schmidts Keihin Smooth CRS Carbs

Anyone who that is sick of fiddling around with Amals this is the solution and want more power and plug and play installation the Keihin 33 mm CRS smooth bore carbs that are set up for Nortons by Jim Schmidt Norton Guru in Northern California has your back . After spending months goofing around with my Amals I stumbled across Jim and could not be happier unless I were to win the lottery ! I installed them today with his air cleaner and fuel line , and throttle . I turned on the gas , put the choke on and walla , the Cobat fired up First Kick . Not only that the bike idled perfectly with that Norton thump. I took it for a ride as well and it has never ran like a scalded dog like it does now. The set up requires no synch as the carbs are bolted together and synched. The only adjustments the throttle cable . They are not inexpensive . Around $1350.00 all in for everyhing . Check out his website @ JS Motorsport.com. I have a video on my bike running but cant figure out how to post it ........

Are your plugs clean?

Does anyone know if it is possible to use the ham can style air filter with the Keihen carb kit or if the stock ham can filter can be modified to be used?
Or possibly a slim style ham can be used?

Desmopower said:

Does anyone know if it is possible to use the ham can style air filter with the Keihen carb kit or if the stock ham can filter can be modified to be used?
Or possibly a slim style ham can be used?

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There was a guy on one of the Norton Facebook groups that 3D printed a plate for a Mikuni, might want to reach out to see if he is up for the task.

Keihens on a Norton Commando? What's next, Amals on a Honda CBX?

MexicoMike said:

Keihens on a Norton Commando? What's next, Amals on a Honda CBX?

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I have seen a CB 750 fitted with 4 MK1 amals
No Idea what it ran like

Actually, fitting Amal mk11 Smoothbores to big, tuned up, Japanese bikes used to be the thing to do.

Fast Eddie said:

Actually, fitting Amal mk11 Smoothbores to big, tuned up, Japanese bikes used to be the thing to do.

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It's a bit easier to tune slide carbs than CVs
But this was an early K series honda
I was just surprised to see 4 mk 1 amals
The bike looked like a race track refugee
The amount of weld on the bottom of the alternator case was also notable

baz said:

I have seen a CB 750 fitted with 4 MK1 amals
No Idea what it ran like

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The Keihins on my CB750K6 (1976) are slide carbs and I needed carb cleaner and compressed air to get the pilot jet clear, just like my Commando's mk2 Amal. Balancing my single Amal is easier!

Mart UK said:

The Keihins on my CB750K6 (1976) are slide carbs and I needed carb cleaner and compressed air to get the pilot jet clear, just like my Commando's mk2 Amal. Balancing my single Amal is easier!

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Doesn’t anyone sell a 4:1 manifold kit for the ‘onda ??

Fast Eddie said:

Doesn’t anyone sell a 4:1 manifold kit for the ‘onda ??

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A mate of mine runs a cb750 chop on a pair of VMs
It runs very sweet,he imported the manifolds from the states
I ran my fj 1200 on a single carb for a while but could never get it jetted right

Fast Eddie said:

Doesn’t anyone sell a 4:1 manifold kit for the ‘onda ??

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Used to see twin Webbers occasionally

Fast Eddie said:

Doesn’t anyone sell a 4:1 manifold kit for the ‘onda ??

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Oooh! I’ll bet it’d start first kick every time but just ruin the top end power! Don’t forget choke on only if cold with a VM. Lol!

I used to run mikuni smooth bores on my SOHC '78 CB750F......and a kerker header. never a problem......well I used to lose in a street race to a certain V65 saber Cj