smoking nsr

mongman · Nitrous Nuisance Joined: 26 Jul 2008 Karma :

since i rebuilt the nsr it's been a bit sluggish and only starts on choke unless it's been run that day. it also gives a lot of smoke when pulling away but it stops after a minute or so. runs like normal after that. even letting it warm up for five minutes it still won't go any better. also a bit weaker at top end. i was told by a mate the fuel mix valve on the side of the block needs adjusting. i tried with a spanner earlier but i could only move it a bit. tightening it made a difference but i don't want to do it to much. it was loosened to remove the engine so i know it needs doing but i wanna be sure it's deffo that. fuel economy's not changed though.
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previous: '02 honda nsr, '89 kawasaki zxr 750 h1
current: '09 zzr 1400

baldy · World Chat Champion Joined: 15 Feb 2004 Karma :

Your mates a bit silly, it's the power valve not a fuel mix valve. Have you checked to see if it is set properly or if the head gasket is leaking?
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lukamon · World Chat Champion Joined: 18 May 2007 Karma :

fucking hell, abusive rating for saying "your mates abit silly"?
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killa wrote: Im an ass man myself

Pete. · Super Spammer Joined: 22 Aug 2006 Karma :

NSR Mick · World Chat Champion Joined: 26 Jun 2005 Karma :

I'm not sure if the 125 is the same as the 250 but an NSR smoking more for the 1st minute is normal.

There is a solenoid that allows more oil to flow for the 1st minute of running.
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chillpill · World Chat Champion Joined: 12 Aug 2008 Karma :

yeah all nsrs smoke for the first minuite , was it a just a top-end rebuild or a full engine rebuild you did ?

might just be the powervalve cables need adjusting

baldy · World Chat Champion Joined: 15 Feb 2004 Karma :

mongman · Nitrous Nuisance Joined: 26 Jul 2008 Karma :

he wasn't anyone here. my bad. he said power valve not fuel. after some cautious fiddling with a spanner in a seriously tight space it's now nearly back to normal. at least it wasn't a million miles behind another mates gs600f today around coome abbey. think some tinkering is in order. still smokes but less than before and starts without choke ok. now hits aroung 10,000 rpm before losing power. before it would redline before you noticed any loss. glad it's sorted. going to a bike/car meet tomorrow and i wanna show off a bit! cheers for the posts.
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previous: '02 honda nsr, '89 kawasaki zxr 750 h1
current: '09 zzr 1400