Sorry for the length of this.
Last week I went out and started my 72 CB 350 to get some fluids running through it and since it hasn't been ridden in about 2-3 months because it's winter here in Colorado. The bike once warmed always idles at 1200 rpm as it should and was idling at that speed for about 10-15 minutes after being started when all of a sudden it jumped to 2,000 rpm for no reason ( I'm sure there's a reason ) and I couldn't figure out what was going on so I finally just shut it off.
Today, I go out to the garage and try to start it the usual way, chokes on, fuels on and gas is in the tank, kill switch to the "on" position, keys on and I hit the starter. The bike fires up and I need to give it just a bit of throttle ( as usual ) for about 20-30 seconds to keep the revs up and then I can shut the chokes off and the bike idles fine..............until today !
When I went to shut the choke off, the bike wouldn't idle and even trying to give it throttle, the engine was laboring and finally died. I tried starting it up again without the chokes and I started getting backfire out the exhaust and still it wouldn't idle. Tried the choke on again but still would not run unless I gave it a good twist of the throttle. Shut it off and discovered that the left exhaust pipe was red hot and the right exhaust pipe was barely luke warm.
This sounds to me like a possible timing issue ????? The bike has been running great for the last couple of years up until now (today). Could the timing just go off all on it's own without anyone messing with it ?
Any help or advice would be greatly appreciated.
Thanks in advance.
Last week I went out and started my 72 CB 350 to get some fluids running through it and since it hasn't been ridden in about 2-3 months because it's winter here in Colorado. The bike once warmed always idles at 1200 rpm as it should and was idling at that speed for about 10-15 minutes after being started when all of a sudden it jumped to 2,000 rpm for no reason ( I'm sure there's a reason ) and I couldn't figure out what was going on so I finally just shut it off.
Today, I go out to the garage and try to start it the usual way, chokes on, fuels on and gas is in the tank, kill switch to the "on" position, keys on and I hit the starter. The bike fires up and I need to give it just a bit of throttle ( as usual ) for about 20-30 seconds to keep the revs up and then I can shut the chokes off and the bike idles fine..............until today !
When I went to shut the choke off, the bike wouldn't idle and even trying to give it throttle, the engine was laboring and finally died. I tried starting it up again without the chokes and I started getting backfire out the exhaust and still it wouldn't idle. Tried the choke on again but still would not run unless I gave it a good twist of the throttle. Shut it off and discovered that the left exhaust pipe was red hot and the right exhaust pipe was barely luke warm.
This sounds to me like a possible timing issue ????? The bike has been running great for the last couple of years up until now (today). Could the timing just go off all on it's own without anyone messing with it ?
Any help or advice would be greatly appreciated.
Thanks in advance.