thoughts on .....

i want to tidy up the handle bars on my shovel. it has the two piece set on it. i want to use an internal throttle cable. not sure whether to get an old pair of pan/shovel bars with the internal throttle setup. or a newer modern aftermarket internal throttle kit.

i like the older bars with the big chrome olive type things that butt up against the grips. mine haven't got these.

dunno if makes any difference with choosing cable setup, but at present it's running a late cv carb, but i'm leaning toward getting a SU setup.

any thoughts or experiences much welcomed.

thanks in advance for any input.

[kevscrivener]

If you use the old-style OEM kit, you will have a "positive-action" throttle, that is to say you have to close it yerself, as there's no return spring. Not in itself a problem, just takes a bit of getting used to especially if you have to shut off quick like if some pillock pulls out on you. On the plus side, it does mean you can take your right hand off the throttle when cruising, which is great for baffling your fellow riders!

Not sure if they are compatible with a modern carb set-up, though; you could do worse than send a PM to Che, I think she's fitted similar to her Pan.

[kiwidave]

if it's running good there's no much technical reason for switching the carb. The CV is highly rated for Shovelhead use, given the right manifold adapter.

Modern internal throttle set-ups cost a bloody BOMB.

Remove those useless indicators (not needed by law on your bike), run the brake line inside the bars and you have removed half the junk around them.

Shovel FX risers/top clamp are peanuts if you want to start again with one-piece bars, which are easy to drill for internal wiring.

don't think the positive action would be too odd to get used too. i inherently shut off with the hand anyway. i never simply let the throttle go to shut the revs off, not natural to me. so that sounds o.k.

it's a plus about the non self-return, as i like the tension adjust on my present throttle, great for the motorway etc.

yes i'm wondering now about the spring return on the carb, and how that would be effected/affect the throttle setup?

regarding the carb, it does run/start well and it's kicker only. i simply like the look of an SU setup. and it'd be inkeeping with the style of bike i'm aiming for.

no indiactors on the bike anyway simply the horn button and light rocker switch. i want to fabricate a cable controlled master cylinder too for the front disks. so the bars will have just a pair of old style levers with cables.

o.k, lots of food for thought, cheers guys.

[zipps]

You do not have to spend a fortune on modern int. set up, have a good look on E.bay .I like the positive shut off.I think its a must have if you are using hand signals.also best quality stainless welding wire is a good substiute for piano wire.I have not done mine yet ,but you will need two r/h grips....

i, the zipmeister. ebay's where i've seen quite a few complete two piece setups with throttle assemblies.

so i see from what you say they use solid wire to control the carb.

so on original setups would the carb not have a return spring, like a modern one? i reckon the return spring would only help matters?

you may be physically pushing the wire to shut off and the carb spring would keep things in toe, no?

o.k, i think i'm kinda decided oem internal throttle is the way forward. any bridges i come to along the way i'll cross/re-design/re-manufacture on the way.

i'll let you know how i get on.

[zipps]

Good man.I do think that this will be suck it and see Re return spring.If you can find someone who can do vintage type grips for this set up let me know...

[kevscrivener]

Originally Posted by jzk

so on original setups would the carb not have a return spring, like a modern one? i reckon the return spring would only help matters?

you may be physically pushing the wire to shut off and the carb spring would keep things in toe, no?

.

Reason you don't have a return spring on this kind of set-up is that due to the way the twistgrip works (on an acme thread) you'd end up with a VERY sore wrist! The resistance on such a set-up is great enough to hold the throttle open where it is left; the extra pull of the return spring would make riding impossible for more than a mile or so. Steve Slocombe of VL Heaven fame came across this problem when sprinting; because safety regs dictate that a throttle return spring is essential, it made it very difficult to hold the throttle open.

oh right, thanks for that. so actually i'd be better off with a modern internal throttle assembly. these have to cater for modern carb setups, yeah?