VTR smoking when startup

[EmilleVTR]

Hi everyone. Im new to this site so pleas pardon me if this has been discussed before. I just bought my vtr and the guy who owned it told me that he serviced it with 20w50 oil and now the bike smokes upon startup. I know the bike ran great before the service. Would it be advisable to change the oil to 10w40 now, can the current oil do harm? Or should I change it to 10w40? Dont know much about these bikes. Please help.

[sirch345]

Welcome aboard

First off the 10W40 should be a Semi-synthetic oil, which the 20W50 oil probably isn't. If it was me I'd change it back to the correct oil, even if the 20W50 oil turns out to be semi-synth. Then take it from there if the bike is still smoking,

Chris.

[StuartWags]

20w50 ??? Do any bikes use 20w50? Hope it is not car oil

[EmilleVTR]

I replaced the oil with Castrol 10w40 today. Still smoking when starting the bike and reving it. Hoping it’s not valve seals. Need to drive it tomorrow morning to get to work, hoping for the best.

[EmilleVTR]

How often do valve seals go on these bikes?

[sirch345]

I replaced the oil with Castrol 10w40 today. Still smoking when starting the bike and reving it. Hoping it’s not valve seals. Need to drive it tomorrow morning to get to work, hoping for the best.

What colour is the smoke?

Chris.

[sirch345]

How often do valve seals go on these bikes?

Only really high mileage engines normally going on.

How many miles has yours covered?

Chris.

[EmilleVTR]

Hi there guys, sorry for the late response, my bike has 40000 km on the clock. Im leaning more toward valve stem seals now as it only smokes when starting and when the bike is idling. According to a Youtuber I got in contact with, the VTR uses the same valve stem seals as a 2005 Hyundai Gets 1.3 and should be allot cheaper than the original parts.