Odd backfire, bike ran on 1 cylinder
Odd backfire, bike ran on 1 cylinder
Hi ya'll, I had a weird start-up the other day, thought I'd see if anyone else has had this issue or might know what it points to. For context, I rebuilt my '02 883 this winter with a Hammer 1250 kit, and Dynatek 2Ki ignition. I'm well beyond the 500 mile break-in period, bike has been running great and getting ~50mpg. No issues with it whatsoever.
I rode around town yesterday to do some errands, it was about 50F out. First stop, rode ~1 mile, shut the bike and fuel off, and when I started it 30min later, bike backfired out the carb. I hit start again, and it fired up running on 1 cylinder (rear), I lightly gave it some throttle and the front cylinder started firing. Rode around for another half hour, with a couple more stops, and it fired up fine each time. Gave it a few hard pulls once it was more warmed up and the bike's power seemed fine.
Am I just being paranoid because it's a "fresh" top end, should I just let it be? Or what should I specifically look at to see what the potential problem might be?
I rode around town yesterday to do some errands, it was about 50F out. First stop, rode ~1 mile, shut the bike and fuel off, and when I started it 30min later, bike backfired out the carb. I hit start again, and it fired up running on 1 cylinder (rear), I lightly gave it some throttle and the front cylinder started firing. Rode around for another half hour, with a couple more stops, and it fired up fine each time. Gave it a few hard pulls once it was more warmed up and the bike's power seemed fine.
Am I just being paranoid because it's a "fresh" top end, should I just let it be? Or what should I specifically look at to see what the potential problem might be?
I'd be checking HT leads and plug caps or even replacing them . I had all kinds of little running issues including hesitation , going on to one cylinder and carb coughs . Replaced the Accel leads with some hand built ones from an independent maker and the bike has never missed a beat .
HDF Community Team
Joined: Dec 2011
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From: San Diego, CA
Maybe you tried to start on the compression stroke? Since I did my 1250 build, when engine hot, the starter will sometimes just kind of "stop" on the first try, then it will start next try. I read several posts here about it being a common issue when you upgrade. I think it could eventually damage starter, but so many have upgraded and I haven't read of any massive replacement of starters afterward. I have heard of "rocking" the motor before starting to minimize this, but IDK. I think is has to do with the increased compression on a warmed up motor, because I don't have the issue when starting a cold motor.
John
John
Last edited by John Harper; May 6, 2021 at 12:29 PM.
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