bs-7 throttle

[Irishrower]

Hey guys

I found a used throttle assembly with the parts shown in the picture, but I can't figure out how it is supposed to go together.  The sliding shoe and the stopper (smallest piece) both have an attaching point for the throttle cable.  I imagine the sliding shoe interfaces with the rifling inside the barrel of the throttle grip as you twist it, but how does it attach to the cable and where does the stopper come into play?

[disc_valve]

Hi,

The answer is simple (it always is when you know how!). The stopper holds the cable outer sleeve. and the cable nipple fits into the sliding sleeve. First task is to feed the cable into the handlebars until it emerges into the slot in the right hand bar. Then, grab hold of the cable and fit the stopper and shoe. The stopper fits into the inner end of the handlebar slot (there's a notch to locate it), and the sliding shoe just sits on top of the slot. Slide the throttle grip on (making sure you engage the sliding shoe properly with the spiral on the inside of the throttle grip pipe) and then fit the two halves of the switch box to sandwich the throttle pipe and hold everything in place.

A light coating of engine oil before asembly will help the throttle action. Don't use grease - the throttle return spring isn't strong enough to overcome the drag of a greasy mehanism.

I hope that helps!

Graham Weeks 

[Irishrower]

Thanks so much!  Yeah it turns out the prior owner hacked up the original bar and welded the upper parts of some other make on there, so I had no idea that the original bar had a purpose built groove in it or a hole for the throttle.  Half the battle with this thing has been trying to figure out what is original to the bike, what was added on by this dude, and what parts were even on there to begin with since I hear there were three models of the BS-7S alone.

So random question: is there a way to take apart the petcock?  I'm trying to take the little valve part that turns and the top part that screws into the tank off and put them on a new petcock body with new O rings I ordered from CPC.

[Bridgestone Man]

The fuel cock does come apart but Bridgestone did not supply inside seals, just the top and bowl seals that you have bought, thy will not fix and internal problem, I would  just get a new petcock, when you find out CPC does not have them, call Richard Clark the provider of this site.

Sam Keys