Problems dialing in my cb160...

10721 Views 16 Replies 6 Participants Last post by Minnesota Driver, Jun 22, 2009

Minnesota Driver

Discussion Starter · Jun 13, 2009

Got my bike together. Cleaned & set the points. Set the timing. Carbs are sparkly clean with new kit in each, they seem to be synched right on. Throttle cables are nice and free. Got spark to both plugs (although it seems kinda white, sparkly. Does that make sense??). Plugs are Ngk D8HA (new set of what was in it when I got the bike).

Bike is running rich--symptoms... Starts up great cold with no choke, smells very rich (no smoke, though) plugs are sooty black. Right side plug was also wet. I understand these bikes are very sensitive to float height, so i've been playing around with that. I got the right side to fire better, not as wet.

I'm having a hard time getting bike to idle, can't really get idle speed to respond to mix screws (they're 2+ turns out) and the idle speed screws are turned way in. It will hold an idle for 20 sec. or so and dies out.

At about half throttle it really starts sputtering. I can take it up the road, but no power beyond half throttle (guessing about 3-4000 rpm).

I'm no mechanic, but i've done my time working on old snowmobiles. Not alot of experience with 4-stroke twins. Any help would be appreciated!

Save

1 - 2 of 17 Posts

jayel

· #5 · Jun 13, 2009

Minnesota Driver said:
Got spark to both plugs (although it seems kinda white, sparkly.

Bike is running rich--symptoms... Starts up great cold with no choke, smells very rich (no smoke, though) plugs are sooty black.

I'm having a hard time getting bike to idle, can't really get idle speed to respond to mix screws (they're 2+ turns out) and the idle speed screws are turned way in.

are the points throwing a arc or just a sharp clean pop? arcing is caused by bad condensers,
check those slow speed jets again for your idling problem the orifices are so small it's easy to miss cleaning them,
it should flow straight thru, just had a guys Honda scooter in and he swore up and down the carb was clean,
someone had told him about the cross holes in those jets so he had cleaned them but didn't see the thru hole (top to bottom)

Save

jayel

· #11 · Jun 13, 2009

Minnesota Driver said:
I went out and kicked her over after dark. Nice spark from the plugs, plenty of sparking from the points as well. I would assume in the dark they should put out some light, but they did seem to be arcing quite a bit.

it should be just a single clean arc not a bunch of sparkles like a 4th of july sparkler

Save

1 - 2 of 17 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.

Top Contributors this Month