yamaha yq50 blue smoke problem

[pitbull]

hi, everyone, iam new on here, i have a problem with my sons yamaha yq50 year is 2000 w reg, it started to smoke a lot from the exhuast blue smoke, ive change the head and piston think it would cure it,but its a no no, so i was just wondering if some one has had the same problem, and may be can help me out, or maybe i need to replace something else, so if someone who knows wot the problem is please email me. thank you very much.

[SM.Morgan]

blue smoke is normal from a 2-stroke, if its excessive check that the oil pump is set correctly.
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Harley XR1200

[iooi]

Either as the above said, or if you are pre mixing then you got the % wrong.
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Just because my bike was A DIVVY, does not mean i am......

[pitbull]

yes there is excessive blue smoke then normal, so how do i set the oil pump

[SM.Morgan]

On yamaha scooters there should be a splitter in the throttle cable follow the oil cable from the splitter and there should be a set-up with two nuts. (like on a push bike brake cable)
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Harley XR1200

[pitbull]

on this model is a autolube oil pump i will look in the morning, thanks

[pitbull]

hi still no joy still smoking like hell its just throwing it out, it just fills the garden with smoke,i was having a good look at the engine and theres not much to look out to see whats wrong.now the light dont work, any ideas what else it could be.

[iooi]

Pump will be under a cover somewhere, could be cable has snapped and its running full on.
Have a look in the Manual thread there maybe a link to one in there, failing that a google may bring one up.
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Just because my bike was A DIVVY, does not mean i am......

[pitbull]

the pump has no cable its just 2 pipes 1 from the mixing tank and the other is to the carb,the pump is driven by a cog.

[pitbull]

still no joy with the yamaha yq50 still loads of smoke from the exhaust. ive changed the head and piston and rings, just wondering would it be the carb, or wrong oil, its due for the mot soon so i need to fix this problem, and can anyone tell me why the starter dont work, i put a new relay and stater motor in but dont work, the battery is fully charged, and the lights dont work, the side lights only work when the engine is running, but no main or dip beam, iam sorry for being a pain, but i really need to fix these problems so if some one has had the same problems pease help many thanks

[rezzin]

Definately warmed up properly?

[pitbull]

yes its warmed up left it idleing for 30min+ dont seem to clear.

[iooi]

Lights and starter sounds like a fuse issue. Might be a inline fuse thats blown.
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Just because my bike was A DIVVY, does not mean i am......

[rezzin]

Idling for 30 mins may not be enough to 'warm' the bike up properly. Try giving it a 5min run giving it a bit of beans in that time. Also if it in a 'enclosed' space then it is likely to get very smokey,this is the case in my carport at home. Hope this helps.

[tutton]

Could be a lifetime of shit oil.

Used to have smoke all the time, until i flushed my whole system and started using either esso highgrade 2stroke bout 8 pound a bottle or castrol 2T
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[pitbull]

thanks i try and have another go tomorrow, i sorted out the starter motor, thats works now, apart from it spins but dont turn the engine over.how do i flush the oil out.

[pitbull]

why does the starter motor spin but not turning the engine over

[Finglonga]

[Cigaro]

[pitbull]

battery fully charged,the starter motor turn normal, but not turning the engine, just makes a rattleing noise. and how do you decoke the exhaust.

[aero]

Mmm.....why don't you remove the silencer, and place it in a raging bonfire for at least an hour. I do mean raging, not just marshmellow toasting heat. Get the thing properly hot.

You may find that carbon and oil has built up in side it. This treatment will dry it out to the extent that it will break up and fall out of the silencer easily.

Beat it with a stick once it has cooled off to loosen the clag inside, refit it and I'll have a fiver on the fact that it doesn't smoke anymore.

When I was working in the bike shop we had an oil drum out back for burning off 'smokey' 2 stroke exhausts.
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70's & 80's 4 stoke Yamaha Guru and professional workshop dweller.

[pitbull]

i may as well buy a new exhaust if that will cure the smoke.

[tutton]

Obviously not buy a new one,
just take the current one off, and throw some caustic soda down it make sure the ends are bunged up and your wearing gloves etc.

Hardware shops will sell that soda, its like a really strong bleach kind of substance mix it with water and it can remove limescale and grime etc, so put that mixture in ur pipe, shake it about, leave for about 2 hours, drain all the liquid out, and then get a stick or something and push it and poke to get out and hard stuck on dirt.
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[aero]

Burning it out is a 1000% better then the old causic soda trick, gets it completely clean where as the soda reacts, gets overwhelmed by the amount of oil then stops working.
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70's & 80's 4 stoke Yamaha Guru and professional workshop dweller.

[tutton]

I thought about burning it out idea,
but obviously your going to need some excellerant like petrol.
and im not sure whether the outside casing of the can etc will take the temperatures the inside will?

Just a note =]
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30