View Full Version : Rs whistler

02-08-2016, 05:15 PM

Sent barrel to be resleeved and ordered gaskets, vertex piston + rings + gudgeon pin and small end bearing. Fitted all these and bike started first time and rums well but i have one concern, there is a kind of whistling/whining noise that i THINK is coming from the top end somwhere. The noise speeds up and slows as per the piston speed.

Iv read a couple people have had this noise occur but dont know if it happened after installing new parts. Anyway they seemed to have fixed it after replacing balance shaft gears.

so my questin is, does this sound like the problem i am having or is it just the new parts breaking in?

any ideas would be appreciated

02-09-2016, 10:31 PM
Interesting you should say that I went to put some from another motor same everything and they were tight really tight What I am sure happened is the plastic in the gears had swelled so I took a bit off the outside diameter and all was good ,gears still meshed ok no worries.I think it's safe to say you will be alright.

02-10-2016, 09:53 AM
Yer i thaught as much, but we will see