bike is running rough. help plz

[GForce]

when it comes to my bike, even a little thing will make paranoid only coz i love my bike.
my problem is that the bike is riding more rougher and rougher everyday. i am getting alot more viabration and it feels like the bike is not getting enough fuel. i can still rev it out and power feels abit off but when i do rev it out, the engine feels rough.

my next service is due in 200kms (15k) and i think it has something to do with my carbs and plugs. should i be paranoid or is this a common problem?

malcolm

[mick_dundee]

Might want to elaborate on what the bike is for starters.. what fuel you run and just a few more gory details would be handy.

[Gosling1]

carby balance + new air filter = Nice running.

[Neka79]

plus ur oil is probably at the end of its life...

no harm in getting ur service done 200km early...

is it due for major service?? are u gunna do it or bike shop??

if bike shop, they should do plugs, clean/replace air filter etc..check carbs etc, maybe its due for valves to be checked etc?

its a zx2r ...with 18000km from memory??

[mike-s]

carby balance does a lot for smoothness, esp the low end off the line. worth begging for, borrowing or buying a set, id not recommend stealing, as ardy's just down the road and mightn't approve

[Plaz]

Mal, Get the service done a bit early and then see what you think. If its still rough after the service keep taking it back to the bike shop until they get it right!!

Who are you taking it to anyway?....SA Dirt Bikes are now a kwaka dealer and well worth a try from all the reports I've heard

[greeny]

Yeah take it to SA Dirt bikes.
I used to get my bikes carbies balanced at another Dealer down here but i thought i would give SA dirt bieks a go.

The bike has never run better.
Think they are a bit cheaper too.

[GForce]

its nearly done 15k now and i just recently changed the oil. havent touched sparks or air filter. ill clean out the air and fuel filter tmw so i hope that helps. feels more likely the carbs are out of whack and sparks maybe getting old.
i was going to bring it to boltons kawa. ian the guy down there said he will charge me 100 for carb tune and balance and also 4 new sparks.
ill give dirt bike sa a ring tmw and see how much they can do it for.

[mick_dundee]

My bike has done >100,000 k and I don't reckon it's had a carb tune in it's life, certainly not whilst it's been in my hands, surely 15000k isn't going t send carbs outta whack?

[mike-s]

I know, some bikes ive heard of were so rickety they needed a balance every other month. Then there were others, like my last bike, that you only needed a carby balance after the carbs were stripped, cleaned, and reassembled! and even then it was a tiny adjustment as they weren't more than 10hg or whatever it was out from one another.

[Neka79]

vtr1000 needed one abt every 12,000km..but that was cos they shake to buggery!!

[christianzx6]

a carb tune AND balance, maybe they mean the same thing. Carb tuning takes 5 minutes, order carbtune II from the uk. If they're talking about tuning your carbs to your engine systems setup, for $100 thats pretty awesome. So they're going to rejet your carbs, set your needles and float heights for $100?

more likely they'll throw some vacuum gauges on it, and spend 5 minutes balancing. Buy yourself a set for that $100, it'll maybe cost you 150... Clean or replace spark plugs, clean/replace air filter.

Mike-S, 10mmHg? its a pressure measurement, Hg being mercury. so 10mm Hg is related to pressure by pgh (p=roe, which is density - in this case density of mercury, g is gravity u can take it to be 9.8, and h is your 10 whatever reading). Normally a manufacturer will specify 2cmHg as a tolerance when tuning, but in reality, thats huge and you can balance them far more accurately. So most likely yours were 10mmHg out, and you balanced them and noticed a significant improvement in idle smoothness.

Its not hard to do, the gauges arent overly expensive, and you can tune it whenever you like at your own home. If they're rejetting etc for you, thats an awesome deal for $100.