Isl 400 smoking on startup

[Rawze]

(11-08-2018 )Alfa Gold isl 400 Wrote:  If it is the valve guide seals, is there a oil additive or do you recommend a type of oil I can use ? Also how can I check if the guide seals are leaking? Thanks

If you have narrowed it down to a suspicion of valve guide seals,

For most engines, to check if the exhaust valves are wet with oil, cranking it a bit and watshing the oil pressure come up. The exhaust manifold needs to be pulled back away from the head + the ECM unplugged so it won't fire off to see if they are getting wet. Need to check the intake valves too.