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Author Topic: Merit to this mod? - filling air screws - non stock air filter  (Read 1235 times)

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Offline nixon

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Merit to this mod? - filling air screws - non stock air filter
« on: December 29, 2018, 10:36:17 PM »

Yay or Nay to this minor mod?

http://www.hondachopper.com/garage/carb_info/idle_screw_mod/idle_screw_mod.html


could this explain why my cb750 only runs with screws all the way in?
Im using foam filters over velocity stacks ( yes i tried to fit a stock airbox!..but its an "A" with K carbs
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cb750a 77, cbr900rr 93 with auto clutch

Riding tip " turn in late, feeling great.  Turn in early,  feeling squirrely "

Offline PeWe

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Re: Merit to this mod? - filling air screws - non stock air filter
« Reply #1 on: December 30, 2018, 01:24:04 AM »
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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
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
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 Deltarider

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Re: Merit to this mod? - filling air screws - non stock air filter
« Reply #2 on: December 30, 2018, 02:27:45 AM »
Quote from: PeWe on December 30, 2018, 01:24:04 AM
i have seen a post somewhere on this forum where the hole was soldered. Maybe Hondaman that recommended it.
I seem to remember it was Dave500 who recommended it. Don't know what type of airfilter he runs.
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Offline flybox1

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Re: Merit to this mod? - filling air screws - non stock air filter
« Reply #3 on: December 31, 2018, 08:12:07 AM »
If youre talking about your 750K7, and it has stock PD carbs...the IMS dont have holes.
If you have the earlier carbs, send dave500 a pm, maybe he can explain more...
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

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Offline dave500

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Re: Merit to this mod? - filling air screws - non stock air filter
« Reply #4 on: December 31, 2018, 01:45:01 PM »
you can only enrichen the drilled screws so far,even fully closed they pass air,solid ones give you full control over it,as good as jb weld might be solder is better,i run the full stock air box.
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Offline Medyo Bastos

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Re: Merit to this mod? - filling air screws - non stock air filter
« Reply #5 on: December 31, 2018, 01:51:03 PM »
I use job on mine


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Offline nixon

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Re: Merit to this mod? - filling air screws - non stock air filter
« Reply #6 on: January 03, 2019, 01:06:57 PM »
Thanks guys.  If the 45 slow jets don't give me control over the air screw,  I think I'll solder some up!
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cb750a 77, cbr900rr 93 with auto clutch

Riding tip " turn in late, feeling great.  Turn in early,  feeling squirrely "
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