honda305 Home honda305 Auctions honda305 Gallery honda305 Forum


honda305.com Forum

Login
□ Search
□ FAQ 
□ 
Vintage Honda Owners,
Restorers, Riders and
Admirers

re firing interval

Points Based Ignition | Electronic Ignition Upgrade
Post Reply
tomrux
honda305.com Member
Posts: 1
Joined: Tue Mar 20, 2007 7:53 am

re firing interval

Post by tomrux » Tue Mar 20, 2007 7:58 am

hey can anybody out there settle an argument for me???
what is the firng interval on a cb72.
I reckon it is 360 degrees ie both pistons rise and fall together
Friend reckons 270 degrees ie pistons up and down at opposite times

Tom

LOUD MOUSE
honda305.com Member
Posts: 7817
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Re: re firing interval

Post by LOUD MOUSE » Tue Mar 20, 2007 9:14 am

Most CB72 HONDAS have a 180 crank. (one piston up one down)
So they fire Right/Left, Exhaust/Exhaust.
The DREAM C/CA72/77 engines are 360 crank and as one fires the other exhausts. ............lm
tomrux wrote:hey can anybody out there settle an argument for me???
what is the firng interval on a cb72.
I reckon it is 360 degrees ie both pistons rise and fall together
Friend reckons 270 degrees ie pistons up and down at opposite times

Tom

Post Reply




 

CB-77 | CYP-77 | Road Test | Riding Log | Literature | Zen | Marketplace | VJ Survey | Links | Home