« previous next »
Pages: [1]   Go Down

Author Topic: Camshaft  (Read 1772 times)

0 Members and 1 Guest are viewing this topic.

Offline voxonda

  • Master
  • *****
  • Posts: 2,229
Camshaft
« on: April 11, 2009, 01:51:54 PM »
Anybody experience with the Webcam 41 or 41a, since Buzz at Dynoman has a nice offer. Got a very good engine with original piston area, so no big-bore, that I would like to give a bit more ...................balls but stay 736cc (for now).

Rob
Logged
Better sorry for failing then for the lack of trying.

ev0lution7

  • Guest
Re: Camshaft
« Reply #1 on: April 11, 2009, 02:20:24 PM »
it will give a small "butt dyno" increase but you will need port and polish job and good carbs to take FULL advantage it will be "ok" on a stock motor but not "ideal" as going with the "above" mods!!!
Logged

Offline kghost

  • Really Old Timer ...
  • *******
  • Posts: 6,850
  • www.facebook.com/RetroMecanicaAustralia
Re: Camshaft
« Reply #2 on: April 11, 2009, 03:51:42 PM »
My install with the 41A works good.

Spend the money and get a proper Adjustable Cam Sprocket so you can set the Degree's.
Logged
Stranger in a strange land

Offline MRieck

  • Really Old Timer ...
  • *******
  • Posts: 10,814
  • Big ideas....
Re: Camshaft
« Reply #3 on: April 11, 2009, 03:56:29 PM »
 Anything is better than stock. ;) ;D
Logged
Owner of the "Million Dollar CB"

Offline BlackMax

  • Enthusiast
  • **
  • Posts: 205
Re: Camshaft
« Reply #4 on: April 11, 2009, 07:46:31 PM »
Quote from: kghost on April 11, 2009, 03:51:42 PM
My install with the 41A works good.

Spend the money and get a proper Adjustable Cam Sprocket so you can set the Degree's.

I literally JUST ordered the 41 cam for my F2 motor.  I was just about to get the 41A, but didn't wan't to push my luck with stock retainers and springs.  But, now I'm thinking that the F2 has beefier springs anyway (than K motors), and maybe stronger retainers?    I'm planning on running stock everything else, but am having the head ported and polished, that's it. 

What's the remainder of your setup?  How does it sound with the 41A?  Should I cancel my 41 order and change it to a 41A? 
Logged
1978 CB750SS, 4-1 Yoshi, Pods, 3-angle valve job, ported chambers, ported intake, 41a cam

Offline MRieck

  • Really Old Timer ...
  • *******
  • Posts: 10,814
  • Big ideas....
Re: Camshaft
« Reply #5 on: April 11, 2009, 08:35:00 PM »
Quote from: BlackMax on April 11, 2009, 07:46:31 PM
Quote from: kghost on April 11, 2009, 03:51:42 PM
My install with the 41A works good.

Spend the money and get a proper Adjustable Cam Sprocket so you can set the Degree's.

I literally JUST ordered the 41 cam for my F2 motor.  I was just about to get the 41A, but didn't wan't to push my luck with stock retainers and springs.  But, now I'm thinking that the F2 has beefier springs anyway (than K motors), and maybe stronger retainers?    I'm planning on running stock everything else, but am having the head ported and polished, that's it. 

What's the remainder of your setup?  How does it sound with the 41A?  Should I cancel my 41 order and change it to a 41A? 
Guide wear is a big thing on those motors
Logged
Owner of the "Million Dollar CB"

Offline dpender836

  • Full Member
  • *
  • Posts: 39
Re: Camshaft
« Reply #6 on: April 11, 2009, 08:35:37 PM »
I.m running the 41a cam in my motor, It has a 836 kit, ported head,Kerker header, and I'm running the later carbs with the accel. pump. It pulls pretty hard from 4000 rpm on ;D, and is reliable. I'm happy with it, but what I've read here, there probably is better choices for my motor. As far a sound you really can't tell it has a cam, atleast not at idle. I'm running a f2 lower with a k cyl and head, it was a low mileage F motor with the typical F head problems, it smoked like a 2 stroke. Has anyone used cyclex cams?
Logged

Offline Spanner 1

  • Old Timer
  • ******
  • Posts: 4,092
  • CB 750 K0 ( always thought it was a K1!) + CB750K8
Re: Camshaft
« Reply #7 on: April 11, 2009, 08:50:26 PM »
I'm starting to know there are 'two' sorts of posts here on this Forum.. 1. The Plebs with their everyday bike problems...and 2. The Tuners who only post about their 'big bore' ' cam., piston, whatever mods. between themselves....it's all cool !!
Logged
If your sure it's a carb problem; it's ignition,
If your sure it's an ignition problem; it's carbs....

Offline dpender836

  • Full Member
  • *
  • Posts: 39
Re: Camshaft
« Reply #8 on: April 11, 2009, 09:03:58 PM »
+1 on the valve guides, that was the problem with my F2 head. MREICK and some of the other gurus' have posted alot of info on this problem, do a search on the F heads, you'll save yourself alot of time and frustration. I pulled the motor and did a head gasket and seals, put about 800 miles on before it started smoking. pulled the motor and checked the guides, sure enough they were worn and egg shaped. I found the info here on putting K topends on the F motors, The best decision I made, I just wish I would have researched it here the first time.  
Logged

Offline MRieck

  • Really Old Timer ...
  • *******
  • Posts: 10,814
  • Big ideas....
Re: Camshaft
« Reply #9 on: April 11, 2009, 09:33:55 PM »
Quote from: dpender836 on April 11, 2009, 09:03:58 PM
+1 on the valve guides, that was the problem with my F2 head. MREICK and some of the other gurus' have posted alot of info on this problem, do a search on the F heads, you'll save yourself alot of time and frustration. I pulled the motor and did a head gasket and seals, put about 800 miles on before it started smoking. pulled the motor and checked the guides, sure enough they were worn and egg shaped. I found the info here on putting K topends on the F motors, The best decision I made, I just wish I would have researched it here the first time.  
Well said. The K heads are better and can be adapted. You will not be sorry (except for the keepers.)
Logged
Owner of the "Million Dollar CB"

Offline voxonda

  • Master
  • *****
  • Posts: 2,229
Re: Camshaft
« Reply #10 on: April 12, 2009, 01:50:15 AM »
Well got my answers. Will have a 41a with springs ordered for my '76 750 engine. Not sure about retainers but we'll see about that.
Still have a '77 K7, a '78 F2 and a '77 F1(850 kit) laying around, so maybe will have to mess around with the K7 head and cylinders on the F2 bottom, think I have a real strong engine then.

Rob
Logged
Better sorry for failing then for the lack of trying.

Offline kghost

  • Really Old Timer ...
  • *******
  • Posts: 6,850
  • www.facebook.com/RetroMecanicaAustralia
Re: Camshaft
« Reply #11 on: April 12, 2009, 08:12:00 AM »
Adjustable Cam Sprocket too.....

Degree it in properly for best performance gains...

Anything else is guesswork.
Logged
Stranger in a strange land

Offline NitroHunter

  • Radical Street / Strip Turbo
  • Hot Shot
  • ***
  • Posts: 718
  • A man's motorcycle is a reflection of the man
Re: Camshaft
« Reply #12 on: April 12, 2009, 09:01:59 AM »
Here's my .02
It's easy to slot your cam sprocket, they're not very hard material, and you don't have to remove much to hit your opening / closing points. Yes, spend the time to degree the cam.

Per RC liturature, valve springs can be shimmed to the point of .050" before coil bind.
 
F-2's (stock) are NOT stronger retainers, don't push your luck at extended high RPMs with them.

The guides - well, since they ARE probably egg shaped (all of mine have within very low miles), have them replaced, honed (not reamed), and then cut new valve seats. You must cut seats to match once guides are replaced.
Keep in mind these stock honda valves are Stellite coated and grinding removes this facing.

I'd make sure your head porter is looking for port VELOCITY increases, not just simple flow volume numbers. There's a big difference. FYI, with that F-2 head, your exhaust already outflows your intake...
Logged
Robbie the NitroHunter                      Fuel Coupe Hired Gun                  NHRA T/F 640

DRAGBIKE USA XH/MB Recordholder: http://forums.sohc4.net/index.php?action=dlattach;topic=127179.0;attach=332735
DRAGBIKE USA XH/SS Recordholder: http://forums.sohc4.net/index.php?action=dlattach;topic=63940.0;attach=103300
Young mans glory days in the lanes: http://forums.sohc4.net/index.php?action=dlattach;topic=45685.0;attach=66341

Offline voxonda

  • Master
  • *****
  • Posts: 2,229
Re: Camshaft
« Reply #13 on: April 12, 2009, 09:05:56 AM »
Quote from: kghost on April 12, 2009, 08:12:00 AM
Adjustable Cam Sprocket too.....

Degree it in properly for best performance gains...

Anything else is guesswork.

Have all my sprockets made adjustable.

Thanks for your input.

Rob
Logged
Better sorry for failing then for the lack of trying.
Pages: [1]   Go Up
« previous next »