jchek779
Leave the gun. Take the cannoli.
Hi guys,
I recently restored a 69 Honda CL450. The motor was completely torn down, cleaned, refreshed and rebuilt with gaskets, seals, piston rings and a fresh cylinder hone. Since completing the restore, I'm having trouble with a hanging idle when I fire it up. I'll blip the throttle and the bike will continue to rev at 3,000 or 4,000, or whatever. It will also pop through the exhaust occasionnally after letting off the throttle.
Since this started, I have verified my ignition timing, cam timing, checked to ensure my vacuum carb slides are returning when I let off the gas, carbs have been cleaned and rebuilt with fresh brass, and I just moved my valve lash from the 0.0012" that the manual calls for to 0.004" intake and 0.005 exhaust.
The valve lash changed moved my cylinder compressions from 120 per side up to 140psi per side.
Valve timing pics are in Reply #44 in my build thread here: http://www.dotheton.com/forum/index.php?topic=44487.0
As a next step, I was thinking about moving the lash out to 0.007 intake and 0.008" exhaust to see what happens.
Has anyone experienced this before? The bike starts fairly easy and runs good once running, but the hanging idle is obviously incorrect and needs to be fixed.
I appreciate any suggestions you guys can provide.
Jay
I recently restored a 69 Honda CL450. The motor was completely torn down, cleaned, refreshed and rebuilt with gaskets, seals, piston rings and a fresh cylinder hone. Since completing the restore, I'm having trouble with a hanging idle when I fire it up. I'll blip the throttle and the bike will continue to rev at 3,000 or 4,000, or whatever. It will also pop through the exhaust occasionnally after letting off the throttle.
Since this started, I have verified my ignition timing, cam timing, checked to ensure my vacuum carb slides are returning when I let off the gas, carbs have been cleaned and rebuilt with fresh brass, and I just moved my valve lash from the 0.0012" that the manual calls for to 0.004" intake and 0.005 exhaust.
The valve lash changed moved my cylinder compressions from 120 per side up to 140psi per side.
Valve timing pics are in Reply #44 in my build thread here: http://www.dotheton.com/forum/index.php?topic=44487.0
As a next step, I was thinking about moving the lash out to 0.007 intake and 0.008" exhaust to see what happens.
Has anyone experienced this before? The bike starts fairly easy and runs good once running, but the hanging idle is obviously incorrect and needs to be fixed.
I appreciate any suggestions you guys can provide.
Jay