smell of petrol in oil

[Rab]

Hi folks I'm don't know too much about scooters but recently did an oil change & there's a slight smell of petrol coming from the old oil. Is this normal? My scooter is a t5 classic. Thanks in advance.

[henri]

your clutch side main seals "funked" as they say .or at least on the way out . H

[kru251]

AS Henri so eloquently put it! The container you drained the old oil into. Hadn't ever had petrol in it recently? Use a clean container and drain the oil again after a short run out(you can re-use this oil OK). See if the fresh oil has the petrol smell. If it has it's a new seal required. You might also find the engine is harder to start and smokes more with that seal gone!!!!!

[gillie]

ive changed lots because they were f**ked or old type seals but i also had an engine come back to me for a service with a smell of fuel in the oil, i was sure id used the best seals and done a good build and was talking to a dealer about this , he told me to ask the lad had he had flooding issues as he had had a few he was convinced they pushing fuel under pressure past the seal i was sceptical ,,,, anyway the lad told me it had filled barrel and the exhaust up 3 or 4 times and been a f**ker to start but he had changed his float needle and cured it , the dealer said refill the oil and check it after 50 miles , no smell of fuel and again at 200 and 500, im sure the seal may not be 100% but it certainly is ok for now ,,,, i

[henri]

as above , if scoots not showing hard starting/loss of power , leave alone .its a judgement call on wether to strip an do seals or not .if seals totally gone you'd get more petrol than oil out the gearbox. when i drain oil i usually keep it in a jam jar for a day or 2 .an from a tip from sime66 have a magnet nxt to it, then you can see if petrols present as it will seperate an sit on top, an any steel debris will collect nxt to magnet . biggest tip is the colour tho, black oil=carbon present from combustion =seals gone . H