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marking on points cam

Points Based Ignition | Electronic Ignition Upgrade
DOUG6PIPES
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Location: gillingham kent

marking on points cam

Post by DOUG6PIPES » Sat Apr 23, 2016 9:50 am

can anybody tell me , when the rh cylinder is on F on the alternator rotor with the points just opening where should the line on the end of the points cam be

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malcolmgb
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Post by malcolmgb » Mon Apr 25, 2016 8:47 am

The line on the points cam is TDC for right cyl. so when T is lined up on rotor the points cam line should also be vertical at top.
1977 CB400F
1973 CL175
1976 XL175 - Sold
1964 CL72
1966 CA78

LOUD MOUSE
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Re: marking on points cam

Post by LOUD MOUSE » Mon Apr 25, 2016 9:27 am

Keep in mind the engine is a 180 crank.
You install the cam chain with the "O" on the cam sprocket vertical to the center of the head casting and the line on the point cam toward the "O".
Now to set the timing/valves you must rotate the crank a cycle so the line on the points cam is down/vertical to the center of the head casting and the rotor is at "T". ....................lm
DOUG6PIPES wrote:can anybody tell me , when the rh cylinder is on F on the alternator rotor with the points just opening where should the line on the end of the points cam be

DOUG6PIPES
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Joined: Fri Jan 15, 2010 2:05 pm
Location: gillingham kent

ignition timing

Post by DOUG6PIPES » Sat Apr 30, 2016 3:52 am

thanks for your replies ,i still need help as you both give different answers

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Muddy
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Post by Muddy » Sat Apr 30, 2016 4:54 pm

G'day Doug6Pipes

Just a suggestion, but as this topic covers several different model bikes, it often pays to clarify which model/year you are referring to. I have a '64 C72 and was thinking you were referring to that model, but rereading it now looks like you are referring to the CB72? This may explain why the answers are differing?

Regards

Muddy
Thanks.

Regards

Muddy

'64 C72
'63 C72

DOUG6PIPES
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Joined: Fri Jan 15, 2010 2:05 pm
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ignition timing

Post by DOUG6PIPES » Sun May 01, 2016 3:58 am

Thanks Muddy you are right, the bike is a 1963 CB72

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Muddy
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Location: Sunshine Coast, QLD, Australia

Post by Muddy » Sun May 01, 2016 4:06 am

G'day Doug6Pipes

I'm sorry too as that means I cannot help at all - the 2 points model is still a mystery to me.

Good luck.

Regards

Muddy
Thanks.

Regards

Muddy

'64 C72
'63 C72

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