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Post by TheRoseyBiker on Aug 29, 2013 13:13:14 GMT
Right, I've got the Danmoto Carbon GP exhaust on my Yamaha R125, and it backfires like mad. Sometimes like 2/3 times a week, I get one sudden bang, sounds exactly like a shot-gun going off! Literally everytime I release the throttle it backfires. Does the backfire damage my engine or anything? Some websites say it does, some say it doesn't?
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Post by optimised yammy on Aug 29, 2013 20:46:13 GMT
All It is pal is your engine pumping through a little to much petrol which is igniting in the exhaust (i think that's where it ignites) it doesn't do damage I believe  I mean if you listen to really high end hyper cars they backfire like fuck its quite normal after a new exhaust is put on where its not mapped properly don't worry yourself to much  much love <3 |
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Post by cbrsims on Aug 30, 2013 1:48:04 GMT
over fueling mate, worst it will do is make your mpg alittle worse, but try a aftermarket air filter bmc or k&n that will make it pop less
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Post by centrez on Aug 30, 2013 9:57:03 GMT
sounds like you are running lean and it needs rejetting, it will eventually kill your plug and leads over very long jorneys, if it is backfireing like mad as you say i would defo get it re jetted or try changing the air/mix screw and see if that helps first.
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Post by cbrsims on Aug 30, 2013 11:00:49 GMT
You know these bikes are fuel injected right? doesnt have that on the injecters its not a carb basically you need a remap to fix it completely or a powercomander which is a piggy back ecu, and its not running lean popping and banging is to much fuel which is running rich over fueling like a boss,
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Post by centrez on Aug 30, 2013 11:09:27 GMT
oh i didnt know you that Thought it was carby lol ive never actually worked on a yzf so iam sorry for wrong info :S yeah your right about being rich i always get them 2 bloody confused!,
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Post by TheRoseyBiker on Aug 30, 2013 12:03:59 GMT
So it needs re-mapping? Thing is it costs like £300 for one of them like DynoJet things. £300 I don't have at the moment. I've got an interview for an apprenticeship on Monday, so hopefully if I get that, the money should start rolling in. But until then... damage may be occuring. Unless it doesn't damage it like some of you say?
I'm confused.
The bikes due for a service in 1000 miles, so about a 5/6 weeks, I'll ask then what they think. Probably want to charge me £1,000,000 to fix it knowing them though haha!:L
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Post by cbrsims on Aug 30, 2013 18:34:19 GMT
Try a better quality air filter first mate, that should make the air fuel mix abit better
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Post by TheRoseyBiker on Aug 30, 2013 19:00:16 GMT
Try a better quality air filter first mate, that should make the air fuel mix abit better Cheers! I'm going to get a K&N Air and Oil Filter for my next service, which should be in about 4/5 weeks pal. Do them things make it sound better too? I've heard they make it a bit more beefier? |
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Post by cbrsims on Aug 30, 2013 19:15:24 GMT
It made mine abit louder more bass to it, just dont expect massive performance gains if any, but don't worry about the popping and banging wont harm your engine at all
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Post by TheRoseyBiker on Aug 30, 2013 22:32:50 GMT
It made mine abit louder more bass to it, just dont expect massive performance gains if any, but don't worry about the popping and banging wont harm your engine at all |
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Post by billyr125 on Dec 2, 2013 0:35:39 GMT
This thread made me decide to buy a danmoto gp exhaust |
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I mean if you listen to really high end hyper cars they backfire like fuck its quite normal after a new exhaust is put on where its not mapped properly 
much love <3 
