Search found 4 matches

by jdip16
Tue Aug 06, 2019 7:16 pm
Forum: Technical Discussion
Topic: 81 cb650c backfire on downshift/cruise at 4k rpm
Replies: 8
Views: 1155

Re: 81 cb650c backfire on downshift/cruise at 4k rpm

Sorry it's been a minute. Since my last post I've probably put another 200-250 miles on the bike (named POPeye). Plugs were checked after last post showing a lean mixture. Fiddled with pilot screws and first went out ¼ turn (clymer says 2¼ as a baseline for rebuilt carbs). Adjusted idle accordingly ...
by jdip16
Wed Jul 31, 2019 9:04 pm
Forum: Technical Discussion
Topic: 81 cb650c backfire on downshift/cruise at 4k rpm
Replies: 8
Views: 1155

Re: 81 cb650c backfire on downshift/cruise at 4k rpm

Clamps for boots were tightened down after a long ride last week. Might be taking the bike to work tomorrow. Will check plugs and maybe fiddle with pilot screws after work. Here's a dark photo of my bike with my buddies recently resurrected '74 360t. And also a pic of my winter project picked up tod...
by jdip16
Sat Jul 27, 2019 11:02 am
Forum: Technical Discussion
Topic: 81 cb650c backfire on downshift/cruise at 4k rpm
Replies: 8
Views: 1155

Re: 81 cb650c backfire on downshift/cruise at 4k rpm

CV carbs; exhaust and filter came with the bike. I get that you should tune with everything factory, but I don't have the option at the time. Ballin on a budget if you know what I mean hah.

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by jdip16
Fri Jul 26, 2019 11:26 pm
Forum: Technical Discussion
Topic: 81 cb650c backfire on downshift/cruise at 4k rpm
Replies: 8
Views: 1155

81 cb650c backfire on downshift/cruise at 4k rpm

Hello new friends, ISSUES: backfiring on the downshift or around 4k rpm, a little lag when you want to give her the beans, and when the bike is hot idle is at or above 2k. BACKSTORY After two years of owning my bike (name tbd, suggestions welcomed) I finally got her on the road this May. I received ...

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