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Post by optimised yammy on Mar 30, 2013 23:57:04 GMT
Right this has happened a few tikes now sometimes it doesn't sometimes it does usually if im holding a lower speed say 50 for a while so top gear 55mph 7,000rpm exactly and even if I pull the throttle down all the way it still stays there anyone know what the cause could be? Btw it has only started to happen roughly about the time a little prick nicked my scorpion exhaust baffle but I think it happened before that so any help is appreciated!
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Post by MRB3N on Mar 31, 2013 10:39:33 GMT
Right this has happened a few tikes now sometimes it doesn't sometimes it does usually if im holding a lower speed say 50 for a while so top gear 55mph 7,000rpm exactly and even if I pull the throttle down all the way it still stays there anyone know what the cause could be? Btw it has only started to happen roughly about the time a little prick nicked my scorpion exhaust baffle but I think it happened before that so any help is appreciated! Yep. Simple answer??? - You're running a stock Fuel Map.  When the bike is new from the factory, its is only running at about 70% to 75% of its Potential Power. This is to make up for different emission and power laws around the various countries that the bike is sold in. As soon as you add any aftermarket exhaust or air filter etc, you drop that bikes potential power to about 60% to 65% or even less when you remove baffles etc! To sort these problems you need correct fuelling. This is done with a fuel commander unit of some sort. A few well known brands are: DynoJet Power Commander (Version 3 or Version 5).
GPR PowerJet Extreme
Koso Fuel Control
Malossi ForceMaster.
Speed Sparks Piggy
Daytona ECU.With the right fuel and air ratio mix and at the right times of the bikes fuel power curve you can get your bikes potential power to 90% to 95%!!!For a full 100% is near impossible and would take a long time on a Dyno with a racing team and isn't really worth it. |
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Post by optimised yammy on Mar 31, 2013 12:13:12 GMT
Its been fine before tho?
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Post by MRB3N on Mar 31, 2013 18:57:26 GMT
Its been fine before tho? Well I'm only giving the facts dude.  And wait till you get your bike to run at 95% of its potential. Then you'll realise how pants it was before! I am trying different fuel maps at the moment. But going to write my own soon! |
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Post by optimised yammy on Mar 31, 2013 21:48:32 GMT
Right I found out coming home tht my bike will do 55 only in top gear if im in the gear below it keeps climbing but as soon as I go into top gear the revs start to drop slowly and so does my speed then when I change back down I pick up speed again? :S
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Post by dave70 on Apr 1, 2013 12:55:46 GMT
Right I found out coming home tht my bike will do 55 only in top gear if im in the gear below it keeps climbing but as soon as I go into top gear the revs start to drop slowly and so does my speed then when I change back down I pick up speed again? :S I get the same thing, which is why I mainly tend to stay in 5th gear, unless I'm going down hill or on a flat road with no wind. |
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Post by optimised yammy on Apr 1, 2013 14:23:51 GMT
:S I dont understand why The bikes are doing it? Mine used to hit 90 in top gear
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Post by cbrsims on Apr 1, 2013 21:41:01 GMT
uhm i thought all yzf125rs were all restricted to 83
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Post by dave70 on Apr 1, 2013 23:12:54 GMT
uhm i thought all yzf125rs were all restricted to 83 yeah...it's either 84 or 86 mph when it hits the limiter, can't remember which off hand. |
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Post by cbrsims on Apr 1, 2013 23:36:53 GMT
ahh thought so
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Post by optimised yammy on Apr 2, 2013 2:35:34 GMT
I've had 89 on the flat no wind before on mine but now itl only do 55 in top gear feels like im on a 50cc
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Post by MRB3N on Apr 2, 2013 8:19:01 GMT
I've had 89 on the flat no wind before on mine but now itl only do 55 in top gear feels like im on a 50cc I have never used 6th gear. And I don't know many stock R125 riders that have. The 6th gear only becomes any use when you do engine mods. Other wise it will slow you down. DONT USE IT! |
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Post by optimised yammy on Apr 2, 2013 9:43:01 GMT
Ill bear tht in mind lol im still looking for a frickin power commander mate I cant find any  |
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Post by MRB3N on Apr 4, 2013 11:30:16 GMT
Ill bear tht in mind lol im still looking for a frickin power commander mate I cant find any Irish Al is looking for one as well. I just bought mine out right for £100 off eBay brand new. Didn't realise that they were so hard to come across. The guy I bought mine off was having trouble getting rid of it at £150 and £130. |
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Post by optimised yammy on Apr 4, 2013 12:56:15 GMT
Yh man they R hard to get hold of cheap  |
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