classic motorcycle forum

Motorcycle Discussions => British Bikes => Topic started by: triman65 on February 04, 2009, 07:27:06 PM

Title: Bonneville t120 camshaft
Post by: triman65 on February 04, 2009, 07:27:06 PM

Can anyone please tell me does the camshaft rotate clockwise or anti clockwise. As I am trying to set up boyer micro digital ignition.

Also in the concentric carb is the chock on when the choke is down or up. Hope this is clear enough :-[
 
triman65

Title: Re: Bonneville t120 camshaft
Post by: Hunter on February 04, 2009, 08:57:52 PM

You don,t say which camshaft, but anyway they both rotate clockwise. As for the choke, it is on when it is down ie, it enrichens the mixture by shutting off some of the air supply.

Title: Re: Bonneville t120 camshaft
Post by: triman65 on February 04, 2009, 09:07:53 PM

Hi Hunter

I mean the camshaft were the points should be. :-[

Title: Re: Bonneville t120 camshaft
Post by: L.A.B. on February 04, 2009, 09:10:53 PM

Quote

does the camshaft rotate clockwise or anti clockwise. As I am trying to set up boyer micro digital ignition.

= Clockwise. Watch the direction the end of the camshaft or Boyer rotor turns as you turn the engine over in the normal direction (with the kick starter, for instance).

Quote

Also in the concentric carb is the chock on when the choke is down or up.

For Amal Concentric Mk1 carbs, (presumably there are two?) if the choke slides are in the DOWN position, that is choke ON, so the choke cables will be in the slack condition. Operating the choke lever to pull the choke wires tight moves the choke slides to choke OFF.

Title: Re: Bonneville t120 camshaft
Post by: Goldie on February 05, 2009, 04:35:10 PM

When i had a 1967 Bonneville T120 650, i never had choke slides in the concentric carbs. I just tickled the carbs and it fired up, and exactly the same with my Triton and BSA Rocket 3, no chokes and no problems firing up.