Valve Clearances

Yes, the valve clearence can be checked using the same machine. I know the difference between carb balancing and valve checks

[Viney]

You need a set of feeler guages to check the shims.

[yorkie_chris]

Originally Posted by Daimo

But its mearly a case of plugging a machine to the carbs (via vacum pipe) and letting it work it out. We also done my carb balancing while i was there.

That's either a really advanced vacuum gauge, or you're thinking of something else.

What did the machine look like?

[yorkie_chris]

Originally Posted by HooliganDan

I would do it myself but I don't have a micrometer.

You only need a micrometer to change them, you can check them using just feeler gauges, which are like £5 or less.

Originally Posted by Daimo

Yes, the valve clearence can be checked using the same machine. I know the difference between carb balancing and valve checks

You sure!

[yorkie_chris]

It's possible that it could work, but you'd be measuring any back flow on compression stroke through a valve held open.

Since there's a pressure wave bounces back up the intake a little before that anyway then the accuracy of the measurements would be mental, especially compared to the overall random "noise" of gas flow.

I don't think it's likely to have been attempted.

Dave at Wimbledon Motorcycles is v. reasonable and comes recommended by loads of honda owners. I used to take my cbr there over chiswick honda.
mary

Originally Posted by yorkie_chris

It's possible that it could work, but you'd be measuring any back flow on compression stroke through a valve held open.

Since there's a pressure wave bounces back up the intake a little before that anyway then the accuracy of the measurements would be mental, especially compared to the overall random "noise" of gas flow.

I don't think it's likely to have been attempted.

Er, yeah. I was thinking the same thing.

[yorkie_chris]

Hehe, care to enlighten us daimo?

Originally Posted by yorkie_chris

That's either a really advanced vacuum gauge, or you're thinking of something else.

What did the machine look like?

Slighty smaller than a shoebox. Think its measured by testing the pressures somehow. Its a £1500 bit of kit, I got a graph measurement on the unit showing me each cyclinder and valve clearence. Then went into a different menu on the unit to run the carb checks which showed a different graph again for each carb.

When I first spoke to my old man about valve checks, he immediatly informed me about it isnt a cam cover off job and don't go to the dealers who would shaft me on labour.

Seeing has he's been riding since he was 16, plenty of years road racing inc a national license, used to strip the race bike down in the living room in the winter, has rebuilt more bikes than i've had hot dinners, and now works on Benellis, Ducatis, and MV Augustas just for fun at RedDogs while he's still recovering, no offence guys, but i'll trust him over whats written here. I very much doubt with his experience he would lie to his son about something like this, and he could strip a bike with his eyes closed, so i'll trust his judgement over a few internet comments .