's Forum Archives - Components

Archive Home >> Components(1 2 3 4 5 6 7 8 9 10 )

I think that my STIs finaly need a WD40 treatment...(5 posts)

I think that my STIs finaly need a WD40 treatment...igorn
Oct 17, 2003 12:51 AM
I have RSX STIs on my everyday comuter bike. So far I put more than 14000 km on them without any special maintance. As weather became colder this autumn, a have noticed that right shifter sometimes misshift when I try to shift from bigger to smaller cogs. Cables and cables casing are ok (I changed them month ago). Actually, this never happens when I came back home, leave bike on room temperature about 30 min and than try to repeat misshift (I could shift hundreads of times without any issue). I think that dust, oil or grease finaly made combination which is dependent of outside temperature :-) and that good flush of WD40 could be a cure.
My question is where exactly I should applay WD40?

re: I think that my STIs finaly need a WD40 treatment...boyd2
Oct 17, 2003 4:50 AM
I did not use WD40, although it may work fine. I use White Lightening "Clean Streak".

I completely removed the shifter pod from the bike. Look for an instruction manual on-line. Take all the covers off so the guts are exposed. Blast everything clean with the clean streak. Lube up with Tri-flo.
Here's what I did ...superdog
Oct 17, 2003 6:25 PM
I sprayed electrical contact cleaner in every nook cranny and orifice of my brake/shift lever mechanism. A lot of black gunk dripped out. I waited 30 minutes for the cleaner to evaporate completely and then I squirted tri-flow into every nook cranny and orifice of the lever mechanism. It worked for me.

Someone on this board recommended electrical contact cleaner for the cleaning agent. I happened to have a can on hand but the stuff is dangerous so if you use it, wear gloves and use in a well ventilated area.
WD40Andy M-S
Oct 19, 2003 10:53 AM
A friend recently came to me with a similar problem. Shifting with the big lever was fine, but the little lever didn't do much and then -- zang -- multishifted (IIRC).

He asked me about new shifters, and I suggested that since we had nothing to lose, we should try the WD40 method.

I put the bike in my workstand and tilted it so that the fluids would run out of the brifter and into a bucket I set below the bike for that purpose, then I opened the QR on the brake, squeezed the lever to open it, then pried up the plastic cap on the back of the shifting mechanism and put the tube from the can of WD40 into the openeing.

I pumped most of a small can of WD40 into that shifter and within a few minutes, it was shifting well again. I let it sit overnight and then returned the bike, and from all I hear, it continues to work.

Spritzing in a little light lube after the shifter has dried out is probably a good idea as well...
Thanks everyone...igorn
Oct 19, 2003 11:08 PM
I did it friday night and so far it works realy fine.

Thanks again,