Author Topic: K&N air pods  (Read 1724 times)

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Offline davelape

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K&N air pods
« on: June 04, 2015, 05:16:22 PM »
74 cb350f
Looking for more HP. Pods are on the carbs. Stock main jet #75 with needle at highest level. Stock exhaust with rusted silencers. Next steps?Please opinions wanted!


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Offline Retro Rocket

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Re: K&N air pods
« Reply #1 on: June 04, 2015, 05:17:44 PM »
Buy a bigger bike... ;D
750 K2 1000cc
750 F1 970cc
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Offline knowsnothing

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Re: K&N air pods
« Reply #2 on: June 05, 2015, 08:38:34 AM »
1978 CB750k Green - 811 engine
1978 CB750k Blue - for sale
1974 CB375F Faded Black - had to have that 6th gear
1976 CB400F Red - in many pieces
1973 CB350F TBD - in many pieces

Offline flybox1

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Re: K&N air pods
« Reply #3 on: June 05, 2015, 09:12:44 AM »
more HP out of a 350F?   ;D 
Pods wont do crap for more HP.
Bore the cylinders and get bigger pistons. 
Port the head.
Hotter Cam (if there is such a thing for a 350F. 400F cam maybe? i dunno)

you might be near 55hp   ::)
'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

Past Bikes
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Offline flybox1

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Re: K&N air pods
« Reply #4 on: June 05, 2015, 09:14:47 AM »
winnepeg defender break his ankles on that play?  ;D :P
'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

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline davelape

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Re: K&N air pods
« Reply #5 on: June 05, 2015, 09:46:17 AM »
Now your talking, in time. Thx


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Offline flybox1

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Re: K&N air pods
« Reply #6 on: June 05, 2015, 10:01:03 AM »
if you're looking for something immediate, change gearing, sprocket tooth count, up or down, for more top speed or off the line launch...
'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

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline Don R

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Re: K&N air pods
« Reply #7 on: June 06, 2015, 08:58:25 PM »
 Will a 400f header fit? there is a theory floating about the K&N pods work best. I had a 400 with them, it needed 1/4 choke to rpm. Stock jetting.

 The pilot jet works part way through the rpm range too, not just at idle.
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Offline davelape

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Re: K&N air pods
« Reply #8 on: June 07, 2015, 06:24:32 AM »
IDK. I hadn't thought of that. Thx!!


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Offline Terry in Australia

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Re: K&N air pods
« Reply #9 on: June 09, 2015, 02:17:20 AM »
A CB400F engine should drop straight into the 350F frame, so don't waste money on big bore kits etc, and the other benefit is you get a 6th gear.

Personally I never liked the 400F, but they were quicker than the 350F, so your pods plus a good free flowing pipe and some jetting is probably all you'll need, with little chance of over-stressing your engine.

If you need more power than that, then as has been previously suggested, buy a bigger bike. Cheers, Terry. ;D 
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So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline davelape

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Re: K&N air pods
« Reply #10 on: June 09, 2015, 03:40:45 AM »
I'm currently looking into options with the 400F motor. I may be thinking too hard on this. As I am rebuilding, I just want to upgrade and add power when I can. I have to remember not to go overboard, it just wastes money and delays the ride. Keep it simple, right? Thx


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Offline knowsnothing

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Re: K&N air pods
« Reply #11 on: June 09, 2015, 11:04:59 AM »
I had a 350f too and loved the bike but wanted a little more power.  I ended up going the 400f motor route.  Biggest perk is the 6th gear.  It more or less is a drop in switch.  The only thing a bit wonky are the controls and the kickstand.  You will need to use the 400f controls and foot rests (i think i had to use them) for both sides and on the right side there is a brake/kicker/footrest clearance issue (still haven't quite figured it out).  The brake doesn't allow the footrest to fold up so the kicker won't clear.  The only other thing is the 350f kickstand has a little metal piece that now gets in the way of the left side controls.  You can either cut it off or use the 400 one.  I also did go with a better flowing exhaust, but there is noticeably more pep with the new setup.  At least that's measured by my ass gauge. 

Here is a picture of it

« Last Edit: June 09, 2015, 11:09:54 AM by knowsnothing »
1978 CB750k Green - 811 engine
1978 CB750k Blue - for sale
1974 CB375F Faded Black - had to have that 6th gear
1976 CB400F Red - in many pieces
1973 CB350F TBD - in many pieces

Offline Terry in Australia

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Re: K&N air pods
« Reply #12 on: June 09, 2015, 03:50:32 PM »
That's good info mate, I spotted a couple of CB400F's and a CB350F yesterday and thought about building another 350F, but with a little more "pep". As I said earlier, I never liked the 400F, (too "slabby" IMHO) so a re-powered 350F would be the best of both worlds.

Here's a pic of one I restored back in the 90's, it was a fantastic bike, but I had to move it on when I got beaten at a traffic light drag by a Mitsubishi Magna........... ;D



I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline davelape

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Re: K&N air pods
« Reply #13 on: June 09, 2015, 05:20:55 PM »
Love it and starting to dig this forum. After set backs or defeat, sometimes inspiration can the biggest hurdle. Thx.


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Offline davelape

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Re: K&N air pods
« Reply #14 on: June 09, 2015, 05:33:04 PM »
The point of this project for me was small mods to performance and looks while respecting Honda and vintage. Restraint from bigger is better, is what is new, challenging and exciting to me. Love this.
Thx


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Offline davelape

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Re: K&N air pods
« Reply #15 on: June 09, 2015, 05:36:11 PM »
Does anybody bore their own jets or is that crazy talk?


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Offline Terry in Australia

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Re: K&N air pods
« Reply #16 on: June 09, 2015, 06:18:49 PM »
You can drill your own jets, I've had to do it when I didn't have the right sizes, the only problem is that you won't be able to mark the jets with the new size once you've drilled them, which can be as confusing as hell down the track. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline knowsnothing

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Re: K&N air pods
« Reply #17 on: June 10, 2015, 08:19:02 AM »
That's good info mate, I spotted a couple of CB400F's and a CB350F yesterday and thought about building another 350F, but with a little more "pep". As I said earlier, I never liked the 400F, (too "slabby" IMHO) so a re-powered 350F would be the best of both worlds.

Here's a pic of one I restored back in the 90's, it was a fantastic bike, but I had to move it on when I got beaten at a traffic light drag by a Mitsubishi Magna........... ;D



Ha i agree Terry, The 400fs look a little dumpy to me.  The Cb375f is the best of both worlds  ;D

That was a good looking restore.  Too bad you didn't keep it.  I hear those Magnas are wicked fast off the line  :P
1978 CB750k Green - 811 engine
1978 CB750k Blue - for sale
1974 CB375F Faded Black - had to have that 6th gear
1976 CB400F Red - in many pieces
1973 CB350F TBD - in many pieces

Offline Terry in Australia

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Re: K&N air pods
« Reply #18 on: June 11, 2015, 03:53:22 AM »
Thanks mate, I bought it for 200 bucks at a swap meet from Jim Parker (Australia's top Indian repairer/restorer) back in 1995, Jim had taken it as part payment for a job he did, but didn't want a jap bike lowering his real estate value, ha ha!

To be fair, it was in horrible condition with rust everywhere that wasn't covered in oil, so all the chrome except a strip on the front fender (where the fork oil had bypassed the seals and settled) was rusted, the engine was furry with corrosion, the tyres were rotted, the seat base was rusted through, the wiring was clagged, blah blah blah. The pic below is how it looked when I got it home from the swap meet.

I was working part time at a gas station (I couldn't afford to restore bikes on my army salary) so every Monday I'd walk into the local Honda dealer (no internet in 1995) where I'd take my $200 and I'd walk out with a tiny bag of parts, back then I'd have to pay $100 for a points cover, $100 for a pair of tank badges etc, so it was a slow process. I found a new genuine seat and the dealer wanted $800 for it, which almost lead to blows, but I eventually got it for $400, which was still stupid money, hell, I only paid $500 for my car!

Anyway, one of the guys who worked at the Honda dealer felt sorry for me and got me a complete new original exhaust for $400, the panel shop where I'd had my car repaired after a crash painted the tank and sidecovers etc (three times on the tank, the first time there were runs everywhere, and the second time they dropped it) all the old chrome was re-done, I rebuilt the engine's top end and painted the engine, had the frame powdercoated by a local guy for cheap, put new chain and sprockets, Koni rear shocks, new tyres, new wiring loom, you name it, I replaced it. Luckily I found another tank at a bike wreckers as the tank that was on it was beyond repair.

Magna's are horrible cars, and killed Mitsubishi production in Oz, but are fast enough to beat 350F's, so I mentioned to a mate that I was thinking of selling it to buy a new lathe. He immediately offered me a new $5K lathe, plus another thousand bucks worth of tooling. He later sold it to the owner of the local Mercedes dealership, he'd owned one back in the 1970's when he was an apprentice in Germany, and he loved it so much he parked it in his games room and occasionally rode it on sunny days.

While I enjoyed the restoration process, I couldn't have kept it. I'm 6'4" and even when I was fit I was over 200 pounds and that's  probably a "cruel and unusual punishment" for a little bike like a 350F. I've only ever played with CB750's since, which are much more suitable for someone my size. Cheers, Terry. ;D   

I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline flybox1

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Re: K&N air pods
« Reply #19 on: June 11, 2015, 07:55:57 AM »
Does anybody bore their own jets or is that crazy talk?


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accuracy is the biggest issue.  we're talking 100ths of a mm here.
Jets are cheap, anyway.
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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

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"