chroming dellorto slides

Spub

Spub

Hero member
Location
Pasadena, California, USA (Left Coast)
In dismantling the carbs on my newly acquired 74 SFC, I noticed quite a bit of wear on the slides. Beings as the bike appears to have been run with the stock bellmouths rather than air filters, this is not too surprising, but it did have only 5K on the clock.

Does anyone know of a source for chromed or otherwise treated slides for a PHB 36 carb? Can the worn slides be cleaned up and chromed? I want to keep the PHB body, so don't want to install a new carb, and the bike will not see huge annual mileage.

I had a Bevel 900SS that ran on bellmouths, and I would remove and wipe down the slides now and then. Put 5K plus on that bike and there was much less wear on the slides, and this for a 40MM PHMs and an engine that sucked like a shop vac.
 
Dell'Orto did do chromed slides, I have one in my Gilera Saturno. I've no idea if you could find the correct cutaway and size.
I wonder if a chrome slide wouldn't just wear the carb body more?
Ciao
Paul
 
The chrome ones I have seen are a lot heavier,don't know what effect that might have on throttle responce.
Someone was resleaving the body's,they defiantly do Amals and I think Delos,with new slides its expensive.
I tried the Teflon coating that pistons are done with,had success with 1 Del on my Husky but the Laverda set bubbled,the Teflon is very fine and if it works it does well.Takes up the clearance and reduces friction to boot I think maybe Stefan below or someone else did a more detailed tech explanation on carb slide coating a while back,worth a read.
 
The heavy brass slides can be used with far softer springs, an old off-road endurance trick.  The weight of the slides assists throttle closing, hence you no longer need the stock he-man springs.  I chuck them out/alter them anyway...

No difference in throttle response otherwise, Vince.  Why should there?

Reckon the ?80/slide would be well spent, far easier on the carb body, if you're running filters that is.  Without, I'd expect the bodies to wear at least just as quick, perhaps even quicker as the slide is no longer able to take up some of the inhaled grime.

piet
 
Inertia,I know intuitive thinking usually gets you into trouble in Physics but I would have thought more mass,heavier slide, would accelerate and stop slower = slower throttle response.
 
G'day Vince. Unless you're snapping the throttle open at lightning fast speed, I don't think slide inertia will play a big part in throttle response. Although for a limp-wristed 120 rider it might  :D

 
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