Hi, i am going to attempt a service on my 91 Nc30 can anyone give me some info on the best oil to use, the best spark plugs and the best air filter?? is it worth getting an aftermarket air filter if so whats the best and where can i get it from??

Many Thanks
Kris

Best Oil: 10w 40 Semi-Synthetic. Any variety really, hopefully you will be servicing it regularly enough to not worry about the Oil.
Best Spark Plugs: NGK ER9EH. Have heard people use ER10EH Plugs for bikes running at higher temperatures and speeds.
Best Air Filter: Honda Standard/OEM Pattern Air Filter. A Different Air filter will undoubtedly need your cabrs setting up to match and will affect your performance in a bad way if done even slightly wrong. Also, the Standard Air Filter can easily cope with a modified setup, when using an enlarged Airbox Lid for instance, so it would be silly not to use standard one.



So there you go...


Happy To Help.

excellent, many thanks!!

Kris

Seconded.

Use OEM filter and standard spark plugs :)