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CBR600F - downpipes popping & engine cutting out

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RedPanda
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PostPosted: 09:34 - 15 Mar 2016    Post subject: CBR600F - downpipes popping & engine cutting out Reply with quote
My downpipes are corroded and have a hole. At my service last week I was told to call and order new pipes once they started popping. That started 2 days later.

What's happened twice since though, is that the engine has cut out when at very low speed/revs (big speed bumps & stopping at a red light). That's also when the popping happens.

Is the engine stopping likely to only be because of the hole? I'm worried about riding it so I think I'm going to be a bus wanker for a few days.
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c_dug
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PostPosted: 09:46 - 15 Mar 2016    Post subject: Reply with quote
I've had some huge holes in exhausts in the past, none have ever caused my bike to cut out.
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RedPanda
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PostPosted: 11:21 - 15 Mar 2016    Post subject: Reply with quote
Vincent wrote:
Does your bike have pair valves fitted? Along with the hole, they could be helping the backfiring.

I don't know sorry, I think the whole exhaust system is stock. Here's the offending hole, it is bigger than it was a couple of weeks ago:

https://img.photobucket.com/albums/v624/philr46/DSC_1607_zps6fvxaxsz.jpg
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P.addy
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PostPosted: 12:01 - 15 Mar 2016    Post subject: Reply with quote
I'd say its a different issue entirely.

Whats your idle speed, how is your choke...if you have carbs Laughing
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RedPanda
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PostPosted: 12:40 - 15 Mar 2016    Post subject: Reply with quote
Paddy. wrote:
I'd say its a different issue entirely.

Whats your idle speed, how is your choke...if you have carbs Laughing

Before service I think it was 2.5Ks, post-service it’s more like 1k RPM when sat in neutral. Apparently they did something to the pipe which feeds unused fuel back into the engine. It’s fuel injected, thankfully.

Thanks Vincent, that sounds very ominous Sad I don’t really know what I’m doing so will book it in for pipe fitting and see what they make of the whole thing.
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Matt B
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PostPosted: 12:43 - 15 Mar 2016    Post subject: Reply with quote
Paddy. wrote:
I'd say its a different issue entirely.

Whats your idle speed, how is your choke...if you have carbs Laughing


What I was thinking.

Just had a service? I wonder if they adjusted your idle and set it a little low. Should be somewhere around 1300 - 1400 when it's good and warm.

EDIT - 1000 rpm is too low Thumbs Up
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Carvel
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PostPosted: 12:55 - 15 Mar 2016    Post subject: Reply with quote
1000 revs is probably a little low, mine idles around 1500 revs.

The cutting out is nothing to do with the exhaust, I rode mine around the isle of wight with it sounding like a tractor Razz

It sounds to me like they haven't seated a plug cap properly or something has been disturbed when they've had it in bits.
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Old Thread Alert!

The last post was made 10 years, 205 days ago. Instead of replying here, would creating a new thread be more useful?
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