Author Topic: Valve lash recommendations on RC327 cam?  (Read 2183 times)

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Offline dragracer

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Valve lash recommendations on RC327 cam?
« on: October 29, 2010, 12:34:19 PM »
What is the spec on valve lash for the RC327 camshaft??????

Offline Bill/BentON Racing

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Re: Valve lash recommendations on RC327 cam?
« Reply #1 on: October 29, 2010, 06:31:03 PM »
.012 in. ;D,Someone gonna have a little fun ? ;)Bill
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Offline Sam Green Racing

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Re: Valve lash recommendations on RC327 cam?
« Reply #2 on: October 31, 2010, 01:50:11 PM »
He's been racing the bike for ten years, completely forgot the settings due to never having to touch it. ;D ;D ;D ;D

Just shows how good these bikes are Frankie, hey what ?

Sam. ::) ;)
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Offline 754

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Re: Valve lash recommendations on RC327 cam?
« Reply #3 on: October 31, 2010, 03:54:14 PM »
 Actually its .012 int, and .014 exhaust.. :o..cold..

 try checking them cold, just to see what they are at..
« Last Edit: October 31, 2010, 04:00:53 PM by 754 »
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Offline Bill/BentON Racing

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Re: Valve lash recommendations on RC327 cam?
« Reply #4 on: October 31, 2010, 08:18:50 PM »
Actually its .012 int, and .014 exhaust.. :o..cold..

 try checking them cold, just to see what they are at..
Not according to specs in catalog. .012 in & ex. ;)Bill. Came from blue catalog with V8 on back cover.
BentON Racing Website
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Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
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Offline 754

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Re: Valve lash recommendations on RC327 cam?
« Reply #5 on: October 31, 2010, 08:27:48 PM »
 I was looking at the one with the triple on the cover.. I have the other one at my shop.. either way .012 should work. I would check to see where the vaives  are at  now..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline dragracer

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Re: Valve lash recommendations on RC327 cam?
« Reply #6 on: October 31, 2010, 11:05:21 PM »
He's been racing the bike for ten years, completely forgot the settings due to never having to touch it. ;D ;D ;D ;D

Just shows how good these bikes are Frankie, hey what ?

Sam. ::) ;)

Yes Sam, a mind is a terrible thing to waste- lol. I haven't been on the bike in a while and want to do some maintenance before i take it out again- i haven't adjusted the valves in a long time. I've been neglecting it badly. Funny, it used to be my "go to" bike whenever i would go bracket racing. Now it sits in the back of the shop under the cover collecting dust. 

One  other question on the cam; what is the spec on the  lobe center setting??? I may as well re-check myself with the manufacturers data versus my seat of the pants meter ;D.

Offline Bill/BentON Racing

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Re: Valve lash recommendations on RC327 cam?
« Reply #7 on: November 01, 2010, 03:09:54 AM »
He's been racing the bike for ten years, completely forgot the settings due to never having to touch it. ;D ;D ;D ;D

Just shows how good these bikes are Frankie, hey what ?

Sam. ::) ;)

Yes Sam, a mind is a terrible thing to waste- lol. I haven't been on the bike in a while and want to do some maintenance before i take it out again- i haven't adjusted the valves in a long time. I've been neglecting it badly. Funny, it used to be my "go to" bike whenever i would go bracket racing. Now it sits in the back of the shop under the cover collecting dust. 

One  other question on the cam; what is the spec on the  lobe center setting??? I may as well re-check myself with the manufacturers data versus my seat of the pants meter ;D.
Lobe center 104,all opening and closing taken with valve .050 off seat.duration 325,lift .368,intake opens 31 BTDC,closes 56 ABDC.Ex opens 56 BBDC,closes 31 ATDC.Good Luck,You going to Valdosta?,Bill
BentON Racing Website
OEM Parts | Service | Custom Builds
BentON Racing Facebook
Over 35 years of experience working on vintage motorcycles, with a speciality in Honda SOHC/4 with a focus on the CB750 and other models as well from 1966 - 1985.
______________________________________
1993 HRC RS125 | 1984 NS400R | 1974 Honda CB750/836cc (Calendar Girl) | 1972 CB 500/550 Yoshi Kitted 590cc | 1965 Honda CB450 Black Bomber | 1972 Suzuki T350 | 1973 88cc | Z50/Falcons Pit Bike | 1967 CA100| 1974 CB350 (400F motor)...and more.
______________________________________
See our latest build 'Captain Marvel' CLICK HERE

Offline dragracer

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Re: Valve lash recommendations on RC327 cam?
« Reply #8 on: November 05, 2010, 09:21:15 AM »
He's been racing the bike for ten years, completely forgot the settings due to never having to touch it. ;D ;D ;D ;D

Just shows how good these bikes are Frankie, hey what ?

Sam. ::) ;)

Yes Sam, a mind is a terrible thing to waste- lol. I haven't been on the bike in a while and want to do some maintenance before i take it out again- i haven't adjusted the valves in a long time. I've been neglecting it badly. Funny, it used to be my "go to" bike whenever i would go bracket racing. Now it sits in the back of the shop under the cover collecting dust. 

One  other question on the cam; what is the spec on the  lobe center setting??? I may as well re-check myself with the manufacturers data versus my seat of the pants meter ;D.
Lobe center 104,all opening and closing taken with valve .050 off seat.duration 325,lift .368,intake opens 31 BTDC,closes 56 ABDC.Ex opens 56 BBDC,closes 31 ATDC.Good Luck,You going to Valdosta?,Bill


Not going to make Valdosta this time. I'm hoping Sam will have his beast ready for the first SEMDRA race in 2011. I may have to drag my bike down there so he can have some compnay- lol

Offline dragracer

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Re: Valve lash recommendations on RC327 cam?
« Reply #9 on: November 05, 2010, 09:22:49 AM »
Thanks for the help on the specs gentlemen. Will do my off season maintenance so i can play with the old Honda some next season.