Valve kits and carb cleaning

[Wrigsby1]

Has anyone experience of the Intervalve kits etc by the likes of Motobins... I am going to renew the valves on my 100k+ 100RT as well as get the carbs ultrasonically cleaned and refreshing the front forks... Mates and work have the kit to make this a DIY job and that sort of goes with the DIY nature of Airheads...

Alternatively, if time is short... Roughly what price and who for a valve job and the carb cleaning...? All feedback appreciated...

 

[Wrigsby1]

Any experiences...? Come on chaps don't be shy...

 

[Damien]

I bought valves from either Motorworks or Motobins. I had them delivered to BLR Engineering who made up the guides to suit the valves. They also did the valve seats at the same time, along with a retread on the exhaust stubs. That was about 5 years and 40,000 miles ago.
I would use BLR again, great to deal with and quality work.

A few people are of the opinion that valve life is about 40,000 miles, so that means they need doing again?

A friend has an R80 Basic with 200,000 km on it and the engine is as it left the factory, minus a bit of wear.

 

[cookie]

I have intervalve valves in my Le Mans. They appear to be working fine, but I have heard mutterings about them. On a BMW I'd be inclined to use the oem valves.

You'll almost certainly need to change the exhaust guides. This and the consequent re cutting of the seats is anything but a DIY job IMO.

I've seen okish jobs done by whoever Motorworks use, better jobs by the Cylinder Head Shop, and even better by Ritchie Moore.

Now I think of it the last valve guide job I saw from Motorworks, they never recut the seat, though they said they would, the valve leaked and I had it done locally. Lucky I checked it before putting the head back on.

 

[Rob Farmer]

The cylinder head shop has ceased trading or sold out.

This was a job done by them

Moorespeed and his one piece valves everytime for me

If you are going to ultrasonically clean the carbs make sure you use a proper cleaner and not a cheapo unit thats little more than a parts shaker.

These are David Nimrods carbs after they've been through my cleaner - the choice of cleaning fluid is really important, unfortunately it isn't cheap buying the right fluids. You are probably better off sending them to a pro cleaning company - Zed Parts offer the service http://www.zed-parts.com/zp_ultrasonic_cleaning.html

 

[Paradiso]

Rob, what cleaning fluid would you recommend for carbs? I've got a decent quality 6 litre cleaner. I used degreasing fluid and then diluted washing powder on a Dellorto carb. It was certainly clean, but I had to use a brass brush on the outside casting to restore a smooth finish. Turned out well in the end, but the washing powder made the alloy really dull.
The degreasing fluid alone didn't brighten the surface. That's why I resorted to the washing powder.

 

[Wrigsby1]

Yep, I am tempted by the Moorspeed option and just send the heads away... I spose the trouble is with these old buses that it's pointless getting half a job done...