yamaha rxs running too rich

ba · Borekit Bruiser Joined: 23 Nov 2009 Karma :

Does anyone know how to stop the oil running as fast/rich? in my yamaha rxs 100. Its very smokey and wont hold its revs . Any help would be great , thanks , Barney

P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

i take it you have a cable from the throttle to the oil pump area?
not sure if its the same as my KH125, but when i twist the throttle it opens the oil passage more and more, i can adjust the amount by turning a screw.[/u]

ba · Borekit Bruiser Joined: 23 Nov 2009 Karma :

27cows · World Chat Champion Joined: 01 Nov 2009 Karma :

You can whip off the oil pump cover (three screws, round cover on the right of the engine) and adjust the oil pump easily enough.

When RXS100s smoke a lot, it's usually because the baffle/pipe is full of gunk and needs cleaning out. The oil pump rarely needs to be tinkered with.

It's also possible you could have a sticky choke, which causes similar smoking and inability to rev up.
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The RXS100: vehicle of choice for Chuck Norris

P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

ba · Borekit Bruiser Joined: 23 Nov 2009 Karma :

hmmmnz · Super Spammer Joined: 22 Aug 2006 Karma :

before you change the pump,
i would be pulling the head off and cleaning the dome, piston, and ring grooves of carbon,

i know 27cows is against doing regular piston de-coking but its something i do regularly on my smokies,

i would also check the choke, and re-clean your carb, making sure all jets are clear
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Wiring Diagrams BIDNIP it bitches

27cows · World Chat Champion Joined: 01 Nov 2009 Karma :

And most important of all, change the plug. Also ensure the plug cap is screwed tightly into the HT lead and the end of the lead isn't corroded. Give all the ignition components a good spray with WD40 for good measure. And make sure the throttle slide is round the correct way...
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The RXS100: vehicle of choice for Chuck Norris

MaybeGuy · Super Spammer Joined: 12 Mar 2007 Karma :

or ignore the above and set the mixture screw correctly (NOT the idle screw with a spring behind it). screw it in all the way and back it out 1 and a half turns (i think this is right. been ages since ive set up an rxs carb).

easiest place to start.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!! Mr. Green

Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

UnspeedySam · World Chat Champion Joined: 26 Nov 2009 Karma :

Odd I was about to ask a similar question. My RXS has been drinking oil recently and being really smoky, although I haven't noticed any performance decrease. Although it seems to smoke more when stopped sometimes than others...hope it's not something being stuck... Will adjust the oil pump when I have a spare moment, as I've never done it and the previous owner was a slob.

edit: On the subject of sticky chokes, how do you check for it and how do you fix it? Although the bike is idling properly so it's more likely something stuck open on the oil pump or something...
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Riding: BMW R1150RT `02 bought mildly crashed
Fixing: Also the BMW as I get less broken bits
Gone: ZZR600 '00, TRX850 '97, RXS100 '93, JS125-6B '07, BMW R1100RS '93, Kawasaki ZX-6R-J2 '01, Honda Bros NT400 NC25 '88

27cows · World Chat Champion Joined: 01 Nov 2009 Karma :

Unless the mixture screw has been tinkered with, that won't be the problem. I haven't touched mine in 50,000 miles or more - there's no need.

I encountered the choke problem on a mate's RXS years ago. The spring had broken and all cocked to one side. The choke appeared to work normally but wasn't closing properly. Only way to be sure it's OK is to try one that you know works...but unscrewing it and a visual inspection should be enough.

The amount a stroker smokes can depend on the weather conditions. Mine smokes like buggery when it's anything but warm. Then again the motor has done an immense mileage Laughing

The original motor hardly smoked at all, and used to do about 1000 miles to a litre of 2T Shocked

But it lasted well and ran lovely.
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The RXS100: vehicle of choice for Chuck Norris

UnspeedySam · World Chat Champion Joined: 26 Nov 2009 Karma :

Completely failed to even get the cover off...the screws appear to be made of cheese. Will take it down a bike shop this week to see if they can get them out.

Another random question: The main headlight bulb should light up when on Lo-beam right? Mine appears to have stopped doing it but I'm not sure if that's before or after I just had the headlight off in a failed attempt to replace the Oil warning bulb. Probably a knackered bulb? Or do they have one filament?
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Riding: BMW R1150RT `02 bought mildly crashed
Fixing: Also the BMW as I get less broken bits
Gone: ZZR600 '00, TRX850 '97, RXS100 '93, JS125-6B '07, BMW R1100RS '93, Kawasaki ZX-6R-J2 '01, Honda Bros NT400 NC25 '88

27cows · World Chat Champion Joined: 01 Nov 2009 Karma :

I presume you have an impact driver. You'll have considerable trouble getting those screws out without one. I replaced virtually every crosshead screw on mine with socket caps. Makes life a lot easier.

The headlight bulb has two filaments. Sounds like you may have wiring issues. The headlight bulbs don't blow often - and I don't think I've ever had an instrument/oil/neutral/indicator bulb blow, ever. Instrument lights failing to work can also be down to worn/dirty ignition switch contacts.
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The RXS100: vehicle of choice for Chuck Norris

UnspeedySam · World Chat Champion Joined: 26 Nov 2009 Karma :

I don't unfortunately, but it's on my list of things to buy in the near future. I'll probably buy some socket caps, as I'm getting seriously fed up of stuck screws and nuts now...

It's probably a wiring problem to be honest. The previous owner did a lot of work on the wiring and I'm not convinced he did it properly. The neutral and high beam lights work so a blown oil bulb seems likely to me.
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Riding: BMW R1150RT `02 bought mildly crashed
Fixing: Also the BMW as I get less broken bits
Gone: ZZR600 '00, TRX850 '97, RXS100 '93, JS125-6B '07, BMW R1100RS '93, Kawasaki ZX-6R-J2 '01, Honda Bros NT400 NC25 '88

27cows · World Chat Champion Joined: 01 Nov 2009 Karma :

More likely a poor contact. I have a dodgy indicator warning light that doesn't work for a week...and then comes back again Laughing

An impact driver is probably the most important 'special' tool you can own, with the possible exception of a flywheel puller.
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The RXS100: vehicle of choice for Chuck Norris

ba · Borekit Bruiser Joined: 23 Nov 2009 Karma :

Im just goona sell her. Shes up on ebay now....

https://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=160440411169&ssPageName=STRK:MESELX:IT

27cows · World Chat Champion Joined: 01 Nov 2009 Karma :

ba · Borekit Bruiser Joined: 23 Nov 2009 Karma :

now sold for £225 , £95 profit , didnt buy the bike for that so I am happy

27cows · World Chat Champion Joined: 01 Nov 2009 Karma :

Some jammy bugger got a bargain.
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The RXS100: vehicle of choice for Chuck Norris

MaybeGuy · Super Spammer Joined: 12 Mar 2007 Karma :

225? Mine was 70
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!! Mr. Green

Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

ba · Borekit Bruiser Joined: 23 Nov 2009 Karma :