R100GSPD '93 Noisy Valves..

[(RIP) Bin Ridin]

Hi,

Next move was to enlist the help of John Stanley of Lacken near Blessington. He has a small business restoring and repairing airheads. His diagnosis was that the camshaft was loose in the rear bearing, He has a method for line-boring the engine casting in front of the oil pump, and pressing in a bush, then reaming to be a snug fit (+1thou) on the camshaft. He replaced camshaft as well as oil pump rotor and sleeve, front camshaft bush, timing chain. I had a listen at his workshop, sounds very sweet.
Proof of pudding will be after a few thousand kms, but the diagnosis and the cure make sense. Either I or the PO have let the oil run low, it seems. Luckily, the rest of the engine is pretty good and the bike looks smart, so worth a few bob to get it running well and quietly. I already replaces the cam followers.

John's mobile number is +353 872483999. He is Derby lad so don't expect a Wigla accent.

Onwards and upwards!!

Bin

 

[Rob Farmer]

He is Derby lad so don't expect a Wigla accent.

He'll be one of the untrustworthy Stanleys from Derbyshire then? Them lot that betrayed Richard the third!

 

[(RIP) Bin Ridin]

He never mentioned anyone named Richard, but in Ireland, we keep it dark....

I noticed John was selling a new very clean airheads in the Donedeal, and gave him a call. He is well known to the Classic guys.

I won't get to ride the bike this time, but John seems a very careful man, so I am confident it will be just the job.

Just noticed that I started this thread 1 year ago, 16/3/15 ! I suppose a year is a blink of the eye in the airhead world....

 

[B Murr]

So did you check out the cam to see if it is moving laterally? I still think that would explain it and you would still get good compression if it were the case. Plus I'd guess the followers are getting hammered if the cam is shifting and explains the wear there. Just my two cents of amateur reasoning.

Looks like I was not far off, although I didn't diagnose wether one or both ends of cam moving, is there a prize

 

[(RIP) Bin Ridin]

The prize is that warm feeling of being able to say "I told you so"....